/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/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 03:39:09,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 03:39:09,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 03:39:09,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 03:39:09,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 03:39:09,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 03:39:09,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 03:39:09,135 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 03:39:09,150 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 03:39:09,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 03:39:09,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 03:39:09,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 03:39:09,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 03:39:09,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 03:39:09,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 03:39:09,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 03:39:09,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 03:39:09,153 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 03:39:09,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 03:39:09,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 03:39:09,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 03:39:09,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 03:39:09,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 03:39:09,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:39:09,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 03:39:09,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 03:39:09,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 03:39:09,154 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 03:39:09,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 03:39:09,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 03:39:09,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 03:39:09,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 03:39:09,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 03:39:09,411 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 03:39:09,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-02-15 03:39:09,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dac85e07/82e4aab6a5c646b1bed11258339349e1/FLAG603a9fd98 [2022-02-15 03:39:09,865 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 03:39:09,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-02-15 03:39:09,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dac85e07/82e4aab6a5c646b1bed11258339349e1/FLAG603a9fd98 [2022-02-15 03:39:09,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dac85e07/82e4aab6a5c646b1bed11258339349e1 [2022-02-15 03:39:09,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 03:39:09,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 03:39:09,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 03:39:09,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 03:39:09,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 03:39:09,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f38023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09, skipping insertion in model container [2022-02-15 03:39:09,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 03:39:09,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 03:39:10,148 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/vogal-2.i[808,821] [2022-02-15 03:39:10,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:39:10,196 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 03:39:10,213 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/vogal-2.i[808,821] [2022-02-15 03:39:10,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:39:10,237 INFO L208 MainTranslator]: Completed translation [2022-02-15 03:39:10,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10 WrapperNode [2022-02-15 03:39:10,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 03:39:10,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 03:39:10,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 03:39:10,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 03:39:10,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10" (1/1) ... [2022-02-15 03:39:10,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10" (1/1) ... [2022-02-15 03:39:10,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10" (1/1) ... [2022-02-15 03:39:10,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10" (1/1) ... [2022-02-15 03:39:10,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10" (1/1) ... [2022-02-15 03:39:10,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10" (1/1) ... [2022-02-15 03:39:10,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10" (1/1) ... [2022-02-15 03:39:10,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 03:39:10,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 03:39:10,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 03:39:10,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 03:39:10,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10" (1/1) ... [2022-02-15 03:39:10,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:39:10,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 03:39:10,316 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 03:39:10,318 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 03:39:10,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 03:39:10,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 03:39:10,346 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 03:39:10,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 03:39:10,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 03:39:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 03:39:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 03:39:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 03:39:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 03:39:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 03:39:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 03:39:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 03:39:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 03:39:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 03:39:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 03:39:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 03:39:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 03:39:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 03:39:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 03:39:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 03:39:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 03:39:10,407 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 03:39:10,409 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 03:39:10,564 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 03:39:10,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 03:39:10,569 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-15 03:39:10,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:39:10 BoogieIcfgContainer [2022-02-15 03:39:10,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 03:39:10,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 03:39:10,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 03:39:10,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 03:39:10,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 03:39:09" (1/3) ... [2022-02-15 03:39:10,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f732937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:39:10, skipping insertion in model container [2022-02-15 03:39:10,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:10" (2/3) ... [2022-02-15 03:39:10,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f732937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:39:10, skipping insertion in model container [2022-02-15 03:39:10,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:39:10" (3/3) ... [2022-02-15 03:39:10,604 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-02-15 03:39:10,608 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 03:39:10,608 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 03:39:10,661 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 03:39:10,667 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 03:39:10,667 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 03:39:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 03:39:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 03:39:10,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:10,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:10,690 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-02-15 03:39:10,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:10,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714839698] [2022-02-15 03:39:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:10,767 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,957 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 03:39:10,960 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:10,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714839698] [2022-02-15 03:39:10,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1714839698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:10,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:10,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 03:39:10,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407626860] [2022-02-15 03:39:10,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:10,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 03:39:10,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 03:39:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 03:39:11,000 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:11,065 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-02-15 03:39:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 03:39:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-15 03:39:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:11,077 INFO L225 Difference]: With dead ends: 64 [2022-02-15 03:39:11,077 INFO L226 Difference]: Without dead ends: 29 [2022-02-15 03:39:11,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 03:39:11,088 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:11,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 03:39:11,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-15 03:39:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-15 03:39:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-02-15 03:39:11,128 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-02-15 03:39:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:11,129 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-02-15 03:39:11,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-02-15 03:39:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 03:39:11,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:11,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:11,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 03:39:11,132 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-02-15 03:39:11,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:11,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91753493] [2022-02-15 03:39:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:11,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:11,142 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,273 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 03:39:11,274 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:11,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91753493] [2022-02-15 03:39:11,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [91753493] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:11,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:11,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 03:39:11,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178039795] [2022-02-15 03:39:11,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:11,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 03:39:11,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:11,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 03:39:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 03:39:11,278 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:11,392 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-02-15 03:39:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 03:39:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 03:39:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:11,396 INFO L225 Difference]: With dead ends: 65 [2022-02-15 03:39:11,396 INFO L226 Difference]: Without dead ends: 44 [2022-02-15 03:39:11,400 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 03:39:11,402 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:11,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-15 03:39:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-02-15 03:39:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-02-15 03:39:11,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-02-15 03:39:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:11,418 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-02-15 03:39:11,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-02-15 03:39:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 03:39:11,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:11,421 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] [2022-02-15 03:39:11,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 03:39:11,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:11,423 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-02-15 03:39:11,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:11,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610278989] [2022-02-15 03:39:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:11,444 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:11,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:11,446 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,565 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 03:39:11,565 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:11,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610278989] [2022-02-15 03:39:11,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [610278989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:11,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:11,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 03:39:11,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148574525] [2022-02-15 03:39:11,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:11,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 03:39:11,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 03:39:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:39:11,569 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:11,772 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2022-02-15 03:39:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 03:39:11,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-15 03:39:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:11,774 INFO L225 Difference]: With dead ends: 80 [2022-02-15 03:39:11,774 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 03:39:11,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:11,781 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:11,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 03:39:11,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2022-02-15 03:39:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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 03:39:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-02-15 03:39:11,802 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 21 [2022-02-15 03:39:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:11,802 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-02-15 03:39:11,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-02-15 03:39:11,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 03:39:11,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:11,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:11,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 03:39:11,803 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash -671441351, now seen corresponding path program 2 times [2022-02-15 03:39:11,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:11,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451249789] [2022-02-15 03:39:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:11,806 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:11,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:11,809 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,904 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 03:39:11,905 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:11,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451249789] [2022-02-15 03:39:11,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451249789] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:11,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:11,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:39:11,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908673143] [2022-02-15 03:39:11,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:11,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:39:11,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:39:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:39:11,907 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:12,094 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-02-15 03:39:12,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 03:39:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 03:39:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:12,096 INFO L225 Difference]: With dead ends: 95 [2022-02-15 03:39:12,096 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 03:39:12,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:12,097 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:12,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 46 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 03:39:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 34. [2022-02-15 03:39:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-02-15 03:39:12,107 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-02-15 03:39:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:12,108 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-02-15 03:39:12,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-02-15 03:39:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 03:39:12,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:12,109 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:12,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 03:39:12,109 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash -864301033, now seen corresponding path program 3 times [2022-02-15 03:39:12,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:12,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145617036] [2022-02-15 03:39:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:12,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:12,113 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,199 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 03:39:12,200 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:12,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145617036] [2022-02-15 03:39:12,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [145617036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:12,200 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:12,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:39:12,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561110885] [2022-02-15 03:39:12,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:12,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:39:12,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:39:12,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:12,204 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:12,472 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2022-02-15 03:39:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:39:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 03:39:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:12,476 INFO L225 Difference]: With dead ends: 110 [2022-02-15 03:39:12,476 INFO L226 Difference]: Without dead ends: 89 [2022-02-15 03:39:12,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:12,478 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 162 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:12,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 73 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-15 03:39:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 36. [2022-02-15 03:39:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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 03:39:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-02-15 03:39:12,501 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2022-02-15 03:39:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:12,501 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-02-15 03:39:12,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-02-15 03:39:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 03:39:12,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:12,502 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:12,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 03:39:12,503 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:12,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1518861707, now seen corresponding path program 4 times [2022-02-15 03:39:12,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:12,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027113545] [2022-02-15 03:39:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:12,507 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:12,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:12,509 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,622 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 03:39:12,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:12,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027113545] [2022-02-15 03:39:12,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027113545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:12,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:12,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:39:12,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410644466] [2022-02-15 03:39:12,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:12,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:39:12,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:12,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:39:12,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:39:12,624 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:12,981 INFO L93 Difference]: Finished difference Result 125 states and 169 transitions. [2022-02-15 03:39:12,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:39:12,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 03:39:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:12,984 INFO L225 Difference]: With dead ends: 125 [2022-02-15 03:39:12,984 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 03:39:12,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:12,986 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 240 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:12,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 75 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 03:39:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 38. [2022-02-15 03:39:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-02-15 03:39:13,005 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 27 [2022-02-15 03:39:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:13,005 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-02-15 03:39:13,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-02-15 03:39:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 03:39:13,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:13,006 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:13,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 03:39:13,007 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash 808523091, now seen corresponding path program 5 times [2022-02-15 03:39:13,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:13,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292765709] [2022-02-15 03:39:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:13,012 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:13,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:13,013 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,161 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 03:39:13,161 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:13,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292765709] [2022-02-15 03:39:13,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292765709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:13,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:13,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:39:13,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559810973] [2022-02-15 03:39:13,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:13,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:39:13,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:39:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:13,163 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:13,631 INFO L93 Difference]: Finished difference Result 140 states and 190 transitions. [2022-02-15 03:39:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:39:13,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 03:39:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:13,632 INFO L225 Difference]: With dead ends: 140 [2022-02-15 03:39:13,632 INFO L226 Difference]: Without dead ends: 119 [2022-02-15 03:39:13,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:13,637 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 228 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:13,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-15 03:39:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 40. [2022-02-15 03:39:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 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 03:39:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-02-15 03:39:13,651 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 29 [2022-02-15 03:39:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:13,651 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-02-15 03:39:13,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-02-15 03:39:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 03:39:13,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:13,658 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:13,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 03:39:13,658 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:13,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:13,659 INFO L85 PathProgramCache]: Analyzing trace with hash -252647247, now seen corresponding path program 6 times [2022-02-15 03:39:13,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:13,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020963886] [2022-02-15 03:39:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:13,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:13,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:13,664 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,823 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 03:39:13,823 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:13,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020963886] [2022-02-15 03:39:13,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020963886] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:13,823 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:13,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:39:13,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967228728] [2022-02-15 03:39:13,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:13,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:39:13,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:13,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:39:13,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:39:13,825 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:14,457 INFO L93 Difference]: Finished difference Result 155 states and 211 transitions. [2022-02-15 03:39:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:39:14,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 03:39:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:14,460 INFO L225 Difference]: With dead ends: 155 [2022-02-15 03:39:14,460 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 03:39:14,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:39:14,461 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 321 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:14,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 104 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 03:39:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2022-02-15 03:39:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-02-15 03:39:14,481 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 31 [2022-02-15 03:39:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:14,481 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-02-15 03:39:14,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-02-15 03:39:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 03:39:14,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:14,483 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:14,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 03:39:14,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2130092913, now seen corresponding path program 7 times [2022-02-15 03:39:14,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:14,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808140634] [2022-02-15 03:39:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:14,487 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:14,489 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:14,627 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 03:39:14,628 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:14,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808140634] [2022-02-15 03:39:14,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808140634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:14,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:14,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:39:14,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240955826] [2022-02-15 03:39:14,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:14,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:39:14,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:39:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:14,629 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 03:39:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:15,313 INFO L93 Difference]: Finished difference Result 170 states and 232 transitions. [2022-02-15 03:39:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:39:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 03:39:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:15,314 INFO L225 Difference]: With dead ends: 170 [2022-02-15 03:39:15,314 INFO L226 Difference]: Without dead ends: 149 [2022-02-15 03:39:15,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:15,317 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 369 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:15,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 116 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:15,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-15 03:39:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 44. [2022-02-15 03:39:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 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 03:39:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-02-15 03:39:15,330 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2022-02-15 03:39:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:15,330 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-02-15 03:39:15,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 03:39:15,333 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-02-15 03:39:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 03:39:15,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:15,334 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:15,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 03:39:15,334 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:15,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1825853677, now seen corresponding path program 8 times [2022-02-15 03:39:15,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:15,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741320142] [2022-02-15 03:39:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:15,336 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:15,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:15,338 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,476 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 03:39:15,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:15,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741320142] [2022-02-15 03:39:15,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741320142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:15,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:15,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:15,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626232830] [2022-02-15 03:39:15,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:15,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:15,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:15,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:15,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:15,478 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 03:39:16,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:16,361 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2022-02-15 03:39:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:39:16,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 03:39:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:16,362 INFO L225 Difference]: With dead ends: 185 [2022-02-15 03:39:16,362 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 03:39:16,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:39:16,364 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 327 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:16,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 158 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:39:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 03:39:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 46. [2022-02-15 03:39:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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 03:39:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-02-15 03:39:16,378 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2022-02-15 03:39:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:16,378 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-02-15 03:39:16,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 03:39:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-02-15 03:39:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 03:39:16,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:16,379 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:16,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 03:39:16,379 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:16,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1850497589, now seen corresponding path program 9 times [2022-02-15 03:39:16,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:16,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743071999] [2022-02-15 03:39:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:16,382 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:16,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:16,383 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:16,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:16,536 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 03:39:16,537 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:16,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743071999] [2022-02-15 03:39:16,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1743071999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:16,537 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:16,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:39:16,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786361716] [2022-02-15 03:39:16,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:16,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:39:16,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:16,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:39:16,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:16,538 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 03:39:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:17,540 INFO L93 Difference]: Finished difference Result 200 states and 274 transitions. [2022-02-15 03:39:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:39:17,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-15 03:39:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:17,541 INFO L225 Difference]: With dead ends: 200 [2022-02-15 03:39:17,541 INFO L226 Difference]: Without dead ends: 179 [2022-02-15 03:39:17,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:39:17,542 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 360 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:17,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 175 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:39:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-15 03:39:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 48. [2022-02-15 03:39:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-02-15 03:39:17,556 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2022-02-15 03:39:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:17,556 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-02-15 03:39:17,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 03:39:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-02-15 03:39:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 03:39:17,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:17,557 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:17,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 03:39:17,557 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash -65979607, now seen corresponding path program 10 times [2022-02-15 03:39:17,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:17,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830994322] [2022-02-15 03:39:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:17,563 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:17,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:17,565 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:17,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:17,650 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 03:39:17,650 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:17,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830994322] [2022-02-15 03:39:17,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830994322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:17,651 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:17,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:39:17,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400941557] [2022-02-15 03:39:17,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:17,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:39:17,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:39:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:17,652 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:17,809 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-02-15 03:39:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:39:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-15 03:39:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:17,810 INFO L225 Difference]: With dead ends: 72 [2022-02-15 03:39:17,810 INFO L226 Difference]: Without dead ends: 67 [2022-02-15 03:39:17,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:17,811 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:17,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-15 03:39:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-02-15 03:39:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 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 03:39:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-02-15 03:39:17,838 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 39 [2022-02-15 03:39:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:17,838 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-02-15 03:39:17,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-02-15 03:39:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 03:39:17,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:17,839 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 03:39:17,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 03:39:17,839 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2124486910, now seen corresponding path program 1 times [2022-02-15 03:39:17,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:17,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848638] [2022-02-15 03:39:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:17,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:17,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:17,843 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:17,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:17,892 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 03:39:17,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:17,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848638] [2022-02-15 03:39:17,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [848638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:17,893 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:17,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 03:39:17,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666132084] [2022-02-15 03:39:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:17,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 03:39:17,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 03:39:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:39:17,894 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:18,002 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2022-02-15 03:39:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 03:39:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-15 03:39:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:18,004 INFO L225 Difference]: With dead ends: 113 [2022-02-15 03:39:18,004 INFO L226 Difference]: Without dead ends: 84 [2022-02-15 03:39:18,004 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 03:39:18,005 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:18,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-15 03:39:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-02-15 03:39:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 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 03:39:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-02-15 03:39:18,038 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 45 [2022-02-15 03:39:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:18,039 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-02-15 03:39:18,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:18,039 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-02-15 03:39:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 03:39:18,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:18,039 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 03:39:18,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 03:39:18,040 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1273709643, now seen corresponding path program 2 times [2022-02-15 03:39:18,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:18,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345134897] [2022-02-15 03:39:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:18,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:18,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:18,043 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,104 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 03:39:18,104 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:18,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345134897] [2022-02-15 03:39:18,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [345134897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:18,104 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:18,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:39:18,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871994805] [2022-02-15 03:39:18,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:18,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:39:18,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:39:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:39:18,106 INFO L87 Difference]: Start difference. First operand 76 states and 92 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 03:39:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:18,232 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2022-02-15 03:39:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 03:39:18,232 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 48 [2022-02-15 03:39:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:18,245 INFO L225 Difference]: With dead ends: 141 [2022-02-15 03:39:18,246 INFO L226 Difference]: Without dead ends: 96 [2022-02-15 03:39:18,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:18,246 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:18,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-15 03:39:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-02-15 03:39:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-02-15 03:39:18,285 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 48 [2022-02-15 03:39:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:18,285 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-02-15 03:39:18,286 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 03:39:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-02-15 03:39:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:39:18,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:18,286 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 03:39:18,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 03:39:18,286 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:18,287 INFO L85 PathProgramCache]: Analyzing trace with hash -370162142, now seen corresponding path program 3 times [2022-02-15 03:39:18,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:18,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168737756] [2022-02-15 03:39:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:18,288 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:18,290 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,384 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 03:39:18,384 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:18,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168737756] [2022-02-15 03:39:18,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168737756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:18,384 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:18,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:39:18,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557856051] [2022-02-15 03:39:18,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:18,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:39:18,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:18,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:39:18,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:18,385 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 03:39:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:18,547 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2022-02-15 03:39:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:39:18,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 51 [2022-02-15 03:39:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:18,548 INFO L225 Difference]: With dead ends: 165 [2022-02-15 03:39:18,548 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 03:39:18,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:18,549 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:18,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 03:39:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-02-15 03:39:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.263157894736842) internal successors, (120), 95 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-02-15 03:39:18,596 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 51 [2022-02-15 03:39:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:18,596 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-02-15 03:39:18,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 03:39:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-02-15 03:39:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 03:39:18,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:18,597 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 03:39:18,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 03:39:18,597 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:18,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash 653396117, now seen corresponding path program 4 times [2022-02-15 03:39:18,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:18,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623579244] [2022-02-15 03:39:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:18,600 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:18,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:18,601 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,692 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 03:39:18,692 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:18,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623579244] [2022-02-15 03:39:18,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623579244] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:18,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:18,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:39:18,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043223360] [2022-02-15 03:39:18,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:18,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:39:18,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:39:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:39:18,693 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 03:39:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:18,944 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2022-02-15 03:39:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:39:18,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 54 [2022-02-15 03:39:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:18,945 INFO L225 Difference]: With dead ends: 189 [2022-02-15 03:39:18,945 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 03:39:18,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:18,946 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:18,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 51 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:18,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 03:39:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2022-02-15 03:39:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 107 states have internal predecessors, (136), 3 states have call successors, (3), 3 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 03:39:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2022-02-15 03:39:19,001 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 54 [2022-02-15 03:39:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:19,001 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2022-02-15 03:39:19,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 03:39:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2022-02-15 03:39:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 03:39:19,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:19,002 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2022-02-15 03:39:19,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 03:39:19,002 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash -790311614, now seen corresponding path program 5 times [2022-02-15 03:39:19,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:19,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438044727] [2022-02-15 03:39:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:19,005 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:19,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:19,006 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:19,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:19,120 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 03:39:19,121 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:19,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438044727] [2022-02-15 03:39:19,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438044727] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:19,121 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:19,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:39:19,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150683973] [2022-02-15 03:39:19,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:19,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:39:19,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:19,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:39:19,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:19,122 INFO L87 Difference]: Start difference. First operand 112 states and 140 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 03:39:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:19,400 INFO L93 Difference]: Finished difference Result 213 states and 279 transitions. [2022-02-15 03:39:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:39:19,400 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 57 [2022-02-15 03:39:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:19,401 INFO L225 Difference]: With dead ends: 213 [2022-02-15 03:39:19,401 INFO L226 Difference]: Without dead ends: 132 [2022-02-15 03:39:19,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:19,402 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:19,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 60 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-15 03:39:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-02-15 03:39:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 119 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2022-02-15 03:39:19,462 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 57 [2022-02-15 03:39:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:19,462 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2022-02-15 03:39:19,462 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 03:39:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2022-02-15 03:39:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 03:39:19,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:19,463 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 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 03:39:19,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 03:39:19,463 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:19,464 INFO L85 PathProgramCache]: Analyzing trace with hash -484823691, now seen corresponding path program 6 times [2022-02-15 03:39:19,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:19,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548317324] [2022-02-15 03:39:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:19,465 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:19,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:19,466 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:19,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:19,576 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 03:39:19,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:19,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548317324] [2022-02-15 03:39:19,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [548317324] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:19,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:19,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:39:19,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574495658] [2022-02-15 03:39:19,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:19,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:39:19,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:39:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:39:19,577 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:39:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:19,934 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2022-02-15 03:39:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:39:19,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have 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 03:39:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:19,935 INFO L225 Difference]: With dead ends: 237 [2022-02-15 03:39:19,935 INFO L226 Difference]: Without dead ends: 144 [2022-02-15 03:39:19,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:39:19,936 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:19,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-15 03:39:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2022-02-15 03:39:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.282442748091603) internal successors, (168), 131 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2022-02-15 03:39:19,999 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 60 [2022-02-15 03:39:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:20,000 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2022-02-15 03:39:20,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:39:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2022-02-15 03:39:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 03:39:20,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:20,001 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 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 03:39:20,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 03:39:20,001 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:20,001 INFO L85 PathProgramCache]: Analyzing trace with hash -729809822, now seen corresponding path program 7 times [2022-02-15 03:39:20,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:20,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050783008] [2022-02-15 03:39:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:20,003 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:20,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:20,004 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:20,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:20,126 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 03:39:20,126 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:20,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050783008] [2022-02-15 03:39:20,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050783008] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:20,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:20,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:39:20,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347922788] [2022-02-15 03:39:20,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:20,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:39:20,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:20,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:39:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:20,128 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 03:39:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:20,587 INFO L93 Difference]: Finished difference Result 261 states and 343 transitions. [2022-02-15 03:39:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:39:20,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 63 [2022-02-15 03:39:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:20,589 INFO L225 Difference]: With dead ends: 261 [2022-02-15 03:39:20,589 INFO L226 Difference]: Without dead ends: 156 [2022-02-15 03:39:20,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:20,590 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 126 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:20,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-15 03:39:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-02-15 03:39:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2867132867132867) internal successors, (184), 143 states have internal predecessors, (184), 3 states have call successors, (3), 3 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 03:39:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2022-02-15 03:39:20,671 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 63 [2022-02-15 03:39:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:20,671 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2022-02-15 03:39:20,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 03:39:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2022-02-15 03:39:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:39:20,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:20,676 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 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 03:39:20,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 03:39:20,677 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:20,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1962202539, now seen corresponding path program 8 times [2022-02-15 03:39:20,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:20,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444612240] [2022-02-15 03:39:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:20,679 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:20,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:20,680 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:20,792 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 03:39:20,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:20,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444612240] [2022-02-15 03:39:20,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444612240] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:20,792 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:20,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 03:39:20,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610603188] [2022-02-15 03:39:20,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:20,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 03:39:20,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 03:39:20,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:39:20,794 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:21,035 INFO L93 Difference]: Finished difference Result 379 states and 495 transitions. [2022-02-15 03:39:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 03:39:21,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 03:39:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:21,037 INFO L225 Difference]: With dead ends: 379 [2022-02-15 03:39:21,037 INFO L226 Difference]: Without dead ends: 262 [2022-02-15 03:39:21,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 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 03:39:21,040 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:21,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 42 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-15 03:39:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 152. [2022-02-15 03:39:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.2857142857142858) internal successors, (189), 147 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 193 transitions. [2022-02-15 03:39:21,127 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 193 transitions. Word has length 66 [2022-02-15 03:39:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:21,127 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 193 transitions. [2022-02-15 03:39:21,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 193 transitions. [2022-02-15 03:39:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 03:39:21,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:21,128 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:21,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 03:39:21,128 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1992147995, now seen corresponding path program 1 times [2022-02-15 03:39:21,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:21,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948385311] [2022-02-15 03:39:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:21,131 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:21,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:21,133 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:21,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:21,299 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 03:39:21,300 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:21,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948385311] [2022-02-15 03:39:21,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [948385311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:21,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:21,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:21,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067098830] [2022-02-15 03:39:21,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:21,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:21,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:21,301 INFO L87 Difference]: Start difference. First operand 152 states and 193 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 03:39:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:21,779 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2022-02-15 03:39:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:39:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 67 [2022-02-15 03:39:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:21,781 INFO L225 Difference]: With dead ends: 244 [2022-02-15 03:39:21,781 INFO L226 Difference]: Without dead ends: 183 [2022-02-15 03:39:21,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:39:21,782 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 175 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:21,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 76 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-15 03:39:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-02-15 03:39:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 153 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2022-02-15 03:39:21,863 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 67 [2022-02-15 03:39:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:21,863 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2022-02-15 03:39:21,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 03:39:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2022-02-15 03:39:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:21,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:21,864 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 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 03:39:21,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 03:39:21,864 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:21,865 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 1 times [2022-02-15 03:39:21,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:21,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353261557] [2022-02-15 03:39:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:21,867 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:21,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:21,869 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:22,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:22,297 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 03:39:22,297 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:22,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353261557] [2022-02-15 03:39:22,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1353261557] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:22,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:22,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:39:22,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075031413] [2022-02-15 03:39:22,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:22,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:39:22,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:39:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:22,299 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:23,033 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2022-02-15 03:39:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:39:23,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:23,036 INFO L225 Difference]: With dead ends: 235 [2022-02-15 03:39:23,036 INFO L226 Difference]: Without dead ends: 171 [2022-02-15 03:39:23,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:39:23,037 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 122 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:23,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 91 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-15 03:39:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-02-15 03:39:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.284848484848485) internal successors, (212), 165 states have internal predecessors, (212), 3 states have call successors, (3), 3 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 03:39:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 216 transitions. [2022-02-15 03:39:23,113 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 216 transitions. Word has length 68 [2022-02-15 03:39:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:23,113 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 216 transitions. [2022-02-15 03:39:23,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 216 transitions. [2022-02-15 03:39:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:23,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:23,114 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 7, 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 03:39:23,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 03:39:23,115 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash -222221800, now seen corresponding path program 1 times [2022-02-15 03:39:23,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:23,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555259557] [2022-02-15 03:39:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:23,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:23,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:23,118 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:23,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:23,561 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 03:39:23,561 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:23,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555259557] [2022-02-15 03:39:23,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555259557] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:23,562 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:23,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:23,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559279483] [2022-02-15 03:39:23,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:23,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:23,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:23,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:23,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:23,563 INFO L87 Difference]: Start difference. First operand 170 states and 216 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:24,217 INFO L93 Difference]: Finished difference Result 246 states and 315 transitions. [2022-02-15 03:39:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:39:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:24,220 INFO L225 Difference]: With dead ends: 246 [2022-02-15 03:39:24,220 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 03:39:24,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:24,221 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:24,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 81 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 03:39:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-15 03:39:24,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 165 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 215 transitions. [2022-02-15 03:39:24,294 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 215 transitions. Word has length 68 [2022-02-15 03:39:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:24,294 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 215 transitions. [2022-02-15 03:39:24,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 215 transitions. [2022-02-15 03:39:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:24,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:24,295 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 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 03:39:24,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 03:39:24,295 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:24,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1502085478, now seen corresponding path program 2 times [2022-02-15 03:39:24,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:24,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649263215] [2022-02-15 03:39:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:24,297 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:24,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:24,298 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:24,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:24,700 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 03:39:24,700 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:24,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649263215] [2022-02-15 03:39:24,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649263215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:24,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:24,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:24,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232500603] [2022-02-15 03:39:24,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:24,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:24,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:24,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:24,704 INFO L87 Difference]: Start difference. First operand 170 states and 215 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 03:39:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:25,219 INFO L93 Difference]: Finished difference Result 246 states and 313 transitions. [2022-02-15 03:39:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:39:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 68 [2022-02-15 03:39:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:25,220 INFO L225 Difference]: With dead ends: 246 [2022-02-15 03:39:25,220 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 03:39:25,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:39:25,222 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 96 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:25,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 73 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:25,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 03:39:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-15 03:39:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2727272727272727) internal successors, (210), 165 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2022-02-15 03:39:25,300 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 68 [2022-02-15 03:39:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:25,301 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2022-02-15 03:39:25,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 03:39:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2022-02-15 03:39:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:25,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:25,302 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 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 03:39:25,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 03:39:25,302 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:25,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1079383652, now seen corresponding path program 3 times [2022-02-15 03:39:25,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:25,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113376124] [2022-02-15 03:39:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:25,307 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:25,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:25,309 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:25,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:25,694 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 03:39:25,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:25,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113376124] [2022-02-15 03:39:25,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113376124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:25,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:25,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:39:25,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313545611] [2022-02-15 03:39:25,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:25,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:39:25,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:25,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:39:25,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:25,696 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:39:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:26,313 INFO L93 Difference]: Finished difference Result 246 states and 311 transitions. [2022-02-15 03:39:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:39:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:39:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:26,319 INFO L225 Difference]: With dead ends: 246 [2022-02-15 03:39:26,319 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 03:39:26,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:39:26,324 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:26,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 03:39:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-15 03:39:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2666666666666666) internal successors, (209), 165 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 213 transitions. [2022-02-15 03:39:26,430 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 213 transitions. Word has length 68 [2022-02-15 03:39:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:26,430 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 213 transitions. [2022-02-15 03:39:26,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:39:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 213 transitions. [2022-02-15 03:39:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:26,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:26,431 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 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 03:39:26,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 03:39:26,431 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1221438938, now seen corresponding path program 4 times [2022-02-15 03:39:26,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:26,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403332154] [2022-02-15 03:39:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:26,433 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:26,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:26,434 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:26,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:26,893 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 03:39:26,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:26,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403332154] [2022-02-15 03:39:26,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [403332154] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:26,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:26,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:26,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966076164] [2022-02-15 03:39:26,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:26,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:26,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:26,895 INFO L87 Difference]: Start difference. First operand 170 states and 213 transitions. Second operand has 12 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 03:39:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:27,366 INFO L93 Difference]: Finished difference Result 253 states and 318 transitions. [2022-02-15 03:39:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:39:27,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 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 68 [2022-02-15 03:39:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:27,367 INFO L225 Difference]: With dead ends: 253 [2022-02-15 03:39:27,367 INFO L226 Difference]: Without dead ends: 177 [2022-02-15 03:39:27,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:39:27,368 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 114 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:27,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 63 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-15 03:39:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-02-15 03:39:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.263157894736842) internal successors, (216), 171 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 220 transitions. [2022-02-15 03:39:27,449 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 220 transitions. Word has length 68 [2022-02-15 03:39:27,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:27,449 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 220 transitions. [2022-02-15 03:39:27,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 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 03:39:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 220 transitions. [2022-02-15 03:39:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:27,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:27,451 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 7, 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 03:39:27,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 03:39:27,451 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:27,451 INFO L85 PathProgramCache]: Analyzing trace with hash -614400744, now seen corresponding path program 5 times [2022-02-15 03:39:27,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:27,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641384968] [2022-02-15 03:39:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:27,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:27,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:27,454 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:27,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:27,835 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 03:39:27,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:27,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641384968] [2022-02-15 03:39:27,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1641384968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:27,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:27,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:39:27,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638250109] [2022-02-15 03:39:27,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:27,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:39:27,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:39:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:27,838 INFO L87 Difference]: Start difference. First operand 176 states and 220 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:28,551 INFO L93 Difference]: Finished difference Result 265 states and 332 transitions. [2022-02-15 03:39:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:39:28,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:28,558 INFO L225 Difference]: With dead ends: 265 [2022-02-15 03:39:28,558 INFO L226 Difference]: Without dead ends: 183 [2022-02-15 03:39:28,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:39:28,559 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:28,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 91 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-15 03:39:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2022-02-15 03:39:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.264367816091954) internal successors, (220), 174 states have internal predecessors, (220), 3 states have call successors, (3), 3 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 03:39:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2022-02-15 03:39:28,670 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 68 [2022-02-15 03:39:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:28,670 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2022-02-15 03:39:28,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2022-02-15 03:39:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:28,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:28,671 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 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 03:39:28,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 03:39:28,672 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash -356235306, now seen corresponding path program 6 times [2022-02-15 03:39:28,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:28,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064243391] [2022-02-15 03:39:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:28,674 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:28,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:28,676 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:29,106 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 03:39:29,106 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:29,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064243391] [2022-02-15 03:39:29,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064243391] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:29,106 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:29,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:29,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426359838] [2022-02-15 03:39:29,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:29,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:29,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:29,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:29,108 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:29,658 INFO L93 Difference]: Finished difference Result 268 states and 336 transitions. [2022-02-15 03:39:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:39:29,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:29,659 INFO L225 Difference]: With dead ends: 268 [2022-02-15 03:39:29,659 INFO L226 Difference]: Without dead ends: 183 [2022-02-15 03:39:29,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:39:29,660 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 131 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:29,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 73 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-15 03:39:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-02-15 03:39:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2598870056497176) internal successors, (223), 177 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2022-02-15 03:39:29,774 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 68 [2022-02-15 03:39:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:29,774 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2022-02-15 03:39:29,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2022-02-15 03:39:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:29,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:29,775 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 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 03:39:29,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 03:39:29,775 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:29,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1686421846, now seen corresponding path program 7 times [2022-02-15 03:39:29,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:29,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264912026] [2022-02-15 03:39:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:29,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:29,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:29,778 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:30,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:30,121 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 03:39:30,121 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:30,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264912026] [2022-02-15 03:39:30,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [264912026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:30,121 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:30,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:39:30,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27812768] [2022-02-15 03:39:30,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:30,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:39:30,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:30,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:39:30,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:30,122 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:30,842 INFO L93 Difference]: Finished difference Result 277 states and 345 transitions. [2022-02-15 03:39:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:39:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:30,843 INFO L225 Difference]: With dead ends: 277 [2022-02-15 03:39:30,843 INFO L226 Difference]: Without dead ends: 189 [2022-02-15 03:39:30,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:39:30,844 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 205 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:30,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 89 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-15 03:39:30,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 182. [2022-02-15 03:39:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2598870056497176) internal successors, (223), 177 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2022-02-15 03:39:30,940 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 68 [2022-02-15 03:39:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:30,940 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2022-02-15 03:39:30,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2022-02-15 03:39:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:30,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:30,941 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 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 03:39:30,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 03:39:30,941 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1944587284, now seen corresponding path program 8 times [2022-02-15 03:39:30,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:30,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972477172] [2022-02-15 03:39:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:30,942 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:30,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:30,944 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:31,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:31,286 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 03:39:31,286 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:31,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972477172] [2022-02-15 03:39:31,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1972477172] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:31,286 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:31,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:39:31,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158875788] [2022-02-15 03:39:31,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:31,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:39:31,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:31,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:39:31,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:31,287 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:32,019 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2022-02-15 03:39:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:39:32,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:32,020 INFO L225 Difference]: With dead ends: 274 [2022-02-15 03:39:32,020 INFO L226 Difference]: Without dead ends: 186 [2022-02-15 03:39:32,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:39:32,021 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 133 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:32,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 94 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-15 03:39:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-02-15 03:39:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 3 states have call successors, (3), 3 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 03:39:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 230 transitions. [2022-02-15 03:39:32,142 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 230 transitions. Word has length 68 [2022-02-15 03:39:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:32,143 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 230 transitions. [2022-02-15 03:39:32,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 230 transitions. [2022-02-15 03:39:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:32,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:32,144 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 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 03:39:32,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 03:39:32,144 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash 406558168, now seen corresponding path program 9 times [2022-02-15 03:39:32,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:32,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613328281] [2022-02-15 03:39:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:32,146 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:32,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:32,149 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:32,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:32,522 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 03:39:32,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:32,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613328281] [2022-02-15 03:39:32,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [613328281] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:32,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:32,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:39:32,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527407851] [2022-02-15 03:39:32,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:32,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:39:32,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:32,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:39:32,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:32,523 INFO L87 Difference]: Start difference. First operand 185 states and 230 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:33,215 INFO L93 Difference]: Finished difference Result 280 states and 348 transitions. [2022-02-15 03:39:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:39:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:33,217 INFO L225 Difference]: With dead ends: 280 [2022-02-15 03:39:33,217 INFO L226 Difference]: Without dead ends: 189 [2022-02-15 03:39:33,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:39:33,218 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 133 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:33,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 99 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-15 03:39:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2022-02-15 03:39:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.264367816091954) internal successors, (220), 174 states have internal predecessors, (220), 3 states have call successors, (3), 3 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 03:39:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2022-02-15 03:39:33,306 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 68 [2022-02-15 03:39:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:33,306 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2022-02-15 03:39:33,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2022-02-15 03:39:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:33,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:33,307 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 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 03:39:33,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 03:39:33,307 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash 664723606, now seen corresponding path program 10 times [2022-02-15 03:39:33,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:33,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643987217] [2022-02-15 03:39:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:33,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:33,310 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:33,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:33,758 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 03:39:33,758 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:33,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643987217] [2022-02-15 03:39:33,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1643987217] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:33,758 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:33,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:33,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051164798] [2022-02-15 03:39:33,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:33,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:33,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:33,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:33,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:33,759 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:39:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:34,311 INFO L93 Difference]: Finished difference Result 268 states and 336 transitions. [2022-02-15 03:39:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:39:34,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have 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 03:39:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:34,312 INFO L225 Difference]: With dead ends: 268 [2022-02-15 03:39:34,312 INFO L226 Difference]: Without dead ends: 183 [2022-02-15 03:39:34,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:39:34,313 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 73 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:34,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 72 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-15 03:39:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-02-15 03:39:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2598870056497176) internal successors, (223), 177 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2022-02-15 03:39:34,410 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 68 [2022-02-15 03:39:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:34,410 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2022-02-15 03:39:34,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:39:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2022-02-15 03:39:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:34,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:34,411 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 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 03:39:34,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 03:39:34,411 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:34,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:34,411 INFO L85 PathProgramCache]: Analyzing trace with hash 66466520, now seen corresponding path program 11 times [2022-02-15 03:39:34,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:34,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188233781] [2022-02-15 03:39:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:34,412 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:34,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:34,413 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:34,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:34,801 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 03:39:34,802 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:34,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188233781] [2022-02-15 03:39:34,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [188233781] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:34,802 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:34,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:34,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074857120] [2022-02-15 03:39:34,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:34,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:34,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:34,803 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:35,428 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2022-02-15 03:39:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:39:35,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:35,429 INFO L225 Difference]: With dead ends: 271 [2022-02-15 03:39:35,429 INFO L226 Difference]: Without dead ends: 183 [2022-02-15 03:39:35,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:35,430 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 137 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:35,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 73 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-15 03:39:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2022-02-15 03:39:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.2586206896551724) internal successors, (219), 174 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 223 transitions. [2022-02-15 03:39:35,565 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 223 transitions. Word has length 68 [2022-02-15 03:39:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:35,566 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 223 transitions. [2022-02-15 03:39:35,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 223 transitions. [2022-02-15 03:39:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:35,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:35,567 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 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 03:39:35,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 03:39:35,567 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:35,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1213397158, now seen corresponding path program 12 times [2022-02-15 03:39:35,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:35,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892798453] [2022-02-15 03:39:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:35,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:35,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:35,570 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:35,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:35,993 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 03:39:35,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:35,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892798453] [2022-02-15 03:39:35,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892798453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:35,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:35,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:35,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527123304] [2022-02-15 03:39:35,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:35,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:35,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:35,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:35,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:35,995 INFO L87 Difference]: Start difference. First operand 179 states and 223 transitions. Second operand has 14 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 03:39:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:36,636 INFO L93 Difference]: Finished difference Result 268 states and 334 transitions. [2022-02-15 03:39:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:39:36,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 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 03:39:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:36,637 INFO L225 Difference]: With dead ends: 268 [2022-02-15 03:39:36,637 INFO L226 Difference]: Without dead ends: 183 [2022-02-15 03:39:36,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:39:36,638 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:36,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 73 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-15 03:39:36,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-02-15 03:39:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2542372881355932) internal successors, (222), 177 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2022-02-15 03:39:36,745 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 68 [2022-02-15 03:39:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:36,745 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2022-02-15 03:39:36,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 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 03:39:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2022-02-15 03:39:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:36,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:36,746 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 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 03:39:36,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 03:39:36,746 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1927678186, now seen corresponding path program 13 times [2022-02-15 03:39:36,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:36,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350021395] [2022-02-15 03:39:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:36,748 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:36,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:36,750 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:37,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:37,285 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 03:39:37,285 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:37,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350021395] [2022-02-15 03:39:37,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [350021395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:37,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:37,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:37,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301721541] [2022-02-15 03:39:37,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:37,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:37,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:37,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:37,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:37,286 INFO L87 Difference]: Start difference. First operand 182 states and 226 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:37,951 INFO L93 Difference]: Finished difference Result 274 states and 340 transitions. [2022-02-15 03:39:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:39:37,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:37,953 INFO L225 Difference]: With dead ends: 274 [2022-02-15 03:39:37,953 INFO L226 Difference]: Without dead ends: 186 [2022-02-15 03:39:37,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:37,954 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 82 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:37,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 74 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-15 03:39:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-02-15 03:39:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.25) internal successors, (225), 180 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 229 transitions. [2022-02-15 03:39:38,072 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 229 transitions. Word has length 68 [2022-02-15 03:39:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:38,072 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 229 transitions. [2022-02-15 03:39:38,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 229 transitions. [2022-02-15 03:39:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:38,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:38,072 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 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 03:39:38,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 03:39:38,073 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash 829259994, now seen corresponding path program 14 times [2022-02-15 03:39:38,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:38,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775389419] [2022-02-15 03:39:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:38,074 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:38,075 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:38,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:38,589 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 03:39:38,590 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:38,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775389419] [2022-02-15 03:39:38,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [775389419] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:38,590 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:38,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:39:38,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842574582] [2022-02-15 03:39:38,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:38,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:39:38,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:38,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:39:38,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:38,591 INFO L87 Difference]: Start difference. First operand 185 states and 229 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:39,468 INFO L93 Difference]: Finished difference Result 316 states and 386 transitions. [2022-02-15 03:39:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:39:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:39,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:39,469 INFO L225 Difference]: With dead ends: 316 [2022-02-15 03:39:39,470 INFO L226 Difference]: Without dead ends: 225 [2022-02-15 03:39:39,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:39:39,471 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 107 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:39,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 93 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-15 03:39:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 200. [2022-02-15 03:39:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2512820512820513) internal successors, (244), 195 states have internal predecessors, (244), 3 states have call successors, (3), 3 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 03:39:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2022-02-15 03:39:39,579 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 68 [2022-02-15 03:39:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:39,580 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2022-02-15 03:39:39,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2022-02-15 03:39:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:39,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:39,581 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 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 03:39:39,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 03:39:39,581 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1087425432, now seen corresponding path program 15 times [2022-02-15 03:39:39,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:39,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955995787] [2022-02-15 03:39:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:39,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:39,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:39,584 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:39,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:39,899 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 03:39:39,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:39,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955995787] [2022-02-15 03:39:39,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [955995787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:39,900 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:39,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:39:39,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965905056] [2022-02-15 03:39:39,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:39,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:39:39,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:39,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:39:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:39,901 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 03:39:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:40,254 INFO L93 Difference]: Finished difference Result 310 states and 384 transitions. [2022-02-15 03:39:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:39:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 68 [2022-02-15 03:39:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:40,255 INFO L225 Difference]: With dead ends: 310 [2022-02-15 03:39:40,255 INFO L226 Difference]: Without dead ends: 204 [2022-02-15 03:39:40,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:40,256 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:40,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 53 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-15 03:39:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-02-15 03:39:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.2474747474747474) internal successors, (247), 198 states have internal predecessors, (247), 3 states have call successors, (3), 3 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 03:39:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2022-02-15 03:39:40,367 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 68 [2022-02-15 03:39:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:40,367 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2022-02-15 03:39:40,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 03:39:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2022-02-15 03:39:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:40,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:40,367 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 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 03:39:40,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 03:39:40,368 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:40,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:40,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1244071192, now seen corresponding path program 16 times [2022-02-15 03:39:40,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:40,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532083853] [2022-02-15 03:39:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:40,369 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:40,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:40,370 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:40,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:40,727 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 03:39:40,727 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:40,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532083853] [2022-02-15 03:39:40,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [532083853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:40,728 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:40,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:40,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279317288] [2022-02-15 03:39:40,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:40,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:40,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:40,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:40,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:40,729 INFO L87 Difference]: Start difference. First operand 203 states and 251 transitions. Second operand has 12 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 03:39:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:41,191 INFO L93 Difference]: Finished difference Result 323 states and 399 transitions. [2022-02-15 03:39:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:39:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 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 68 [2022-02-15 03:39:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:41,193 INFO L225 Difference]: With dead ends: 323 [2022-02-15 03:39:41,193 INFO L226 Difference]: Without dead ends: 214 [2022-02-15 03:39:41,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:39:41,194 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:41,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 68 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-15 03:39:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2022-02-15 03:39:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2415458937198067) internal successors, (257), 207 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 261 transitions. [2022-02-15 03:39:41,331 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 261 transitions. Word has length 68 [2022-02-15 03:39:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:41,331 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 261 transitions. [2022-02-15 03:39:41,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 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 03:39:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 261 transitions. [2022-02-15 03:39:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:41,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:41,332 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 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 03:39:41,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 03:39:41,332 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash 687355860, now seen corresponding path program 17 times [2022-02-15 03:39:41,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:41,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277725231] [2022-02-15 03:39:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:41,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:41,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:41,335 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:41,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:41,746 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 03:39:41,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:41,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277725231] [2022-02-15 03:39:41,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1277725231] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:41,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:41,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:41,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893904449] [2022-02-15 03:39:41,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:41,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:41,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:41,748 INFO L87 Difference]: Start difference. First operand 212 states and 261 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:39:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:42,224 INFO L93 Difference]: Finished difference Result 338 states and 415 transitions. [2022-02-15 03:39:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:39:42,225 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have 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 03:39:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:42,225 INFO L225 Difference]: With dead ends: 338 [2022-02-15 03:39:42,225 INFO L226 Difference]: Without dead ends: 220 [2022-02-15 03:39:42,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:39:42,226 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:42,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 69 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:42,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-15 03:39:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2022-02-15 03:39:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.2347417840375587) internal successors, (263), 213 states have internal predecessors, (263), 3 states have call successors, (3), 3 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 03:39:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 267 transitions. [2022-02-15 03:39:42,369 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 267 transitions. Word has length 68 [2022-02-15 03:39:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:42,369 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 267 transitions. [2022-02-15 03:39:42,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:39:42,369 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 267 transitions. [2022-02-15 03:39:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:42,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:42,370 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 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 03:39:42,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 03:39:42,370 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:42,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:42,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1190764904, now seen corresponding path program 18 times [2022-02-15 03:39:42,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:42,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919529680] [2022-02-15 03:39:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:42,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:42,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:42,373 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:42,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:42,804 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 03:39:42,805 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:42,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919529680] [2022-02-15 03:39:42,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [919529680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:42,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:42,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:39:42,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789147315] [2022-02-15 03:39:42,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:42,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:39:42,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:39:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:42,806 INFO L87 Difference]: Start difference. First operand 218 states and 267 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:39:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:43,402 INFO L93 Difference]: Finished difference Result 350 states and 427 transitions. [2022-02-15 03:39:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:39:43,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:39:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:43,403 INFO L225 Difference]: With dead ends: 350 [2022-02-15 03:39:43,403 INFO L226 Difference]: Without dead ends: 226 [2022-02-15 03:39:43,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:39:43,404 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:43,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 74 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-02-15 03:39:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2022-02-15 03:39:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2283105022831051) internal successors, (269), 219 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 273 transitions. [2022-02-15 03:39:43,542 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 273 transitions. Word has length 68 [2022-02-15 03:39:43,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:43,542 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 273 transitions. [2022-02-15 03:39:43,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:39:43,542 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 273 transitions. [2022-02-15 03:39:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:43,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:43,542 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 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 03:39:43,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 03:39:43,543 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:43,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1905045932, now seen corresponding path program 19 times [2022-02-15 03:39:43,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:43,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397610404] [2022-02-15 03:39:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:43,544 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:43,546 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:43,987 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 03:39:43,987 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:43,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397610404] [2022-02-15 03:39:43,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [397610404] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:43,987 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:43,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:43,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604869568] [2022-02-15 03:39:43,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:43,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:43,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:43,988 INFO L87 Difference]: Start difference. First operand 224 states and 273 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:44,553 INFO L93 Difference]: Finished difference Result 362 states and 439 transitions. [2022-02-15 03:39:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:39:44,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:39:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:44,554 INFO L225 Difference]: With dead ends: 362 [2022-02-15 03:39:44,554 INFO L226 Difference]: Without dead ends: 232 [2022-02-15 03:39:44,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:44,555 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 59 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:44,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 79 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-15 03:39:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 203. [2022-02-15 03:39:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.2474747474747474) internal successors, (247), 198 states have internal predecessors, (247), 3 states have call successors, (3), 3 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 03:39:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2022-02-15 03:39:44,663 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 68 [2022-02-15 03:39:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:44,664 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2022-02-15 03:39:44,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2022-02-15 03:39:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:39:44,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:44,664 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 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 03:39:44,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 03:39:44,665 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1110057686, now seen corresponding path program 20 times [2022-02-15 03:39:44,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:44,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119835705] [2022-02-15 03:39:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:44,666 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:44,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:44,668 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:44,828 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 03:39:44,828 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:44,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119835705] [2022-02-15 03:39:44,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119835705] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:44,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:44,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:39:44,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698182778] [2022-02-15 03:39:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:44,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:39:44,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:44,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:39:44,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:44,830 INFO L87 Difference]: Start difference. First operand 203 states and 251 transitions. Second operand has 9 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 03:39:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:45,313 INFO L93 Difference]: Finished difference Result 413 states and 519 transitions. [2022-02-15 03:39:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:39:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 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 68 [2022-02-15 03:39:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:45,315 INFO L225 Difference]: With dead ends: 413 [2022-02-15 03:39:45,315 INFO L226 Difference]: Without dead ends: 408 [2022-02-15 03:39:45,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:45,316 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 120 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:45,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 56 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-02-15 03:39:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 205. [2022-02-15 03:39:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.245) internal successors, (249), 200 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 253 transitions. [2022-02-15 03:39:45,444 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 253 transitions. Word has length 68 [2022-02-15 03:39:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:45,444 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 253 transitions. [2022-02-15 03:39:45,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 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 03:39:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 253 transitions. [2022-02-15 03:39:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 03:39:45,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:45,445 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:45,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 03:39:45,445 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1762866155, now seen corresponding path program 2 times [2022-02-15 03:39:45,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:45,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462520424] [2022-02-15 03:39:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:45,447 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:45,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:45,449 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:45,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:45,586 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 03:39:45,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:45,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462520424] [2022-02-15 03:39:45,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [462520424] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:45,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:45,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:39:45,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009146286] [2022-02-15 03:39:45,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:45,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:39:45,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:45,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:39:45,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:45,589 INFO L87 Difference]: Start difference. First operand 205 states and 253 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:46,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:46,166 INFO L93 Difference]: Finished difference Result 389 states and 489 transitions. [2022-02-15 03:39:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:39:46,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-15 03:39:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:46,167 INFO L225 Difference]: With dead ends: 389 [2022-02-15 03:39:46,167 INFO L226 Difference]: Without dead ends: 219 [2022-02-15 03:39:46,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:39:46,176 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:46,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 93 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:46,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-15 03:39:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 211. [2022-02-15 03:39:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.2378640776699028) internal successors, (255), 206 states have internal predecessors, (255), 3 states have call successors, (3), 3 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 03:39:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 259 transitions. [2022-02-15 03:39:46,328 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 259 transitions. Word has length 70 [2022-02-15 03:39:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:46,329 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 259 transitions. [2022-02-15 03:39:46,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 259 transitions. [2022-02-15 03:39:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:46,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:46,330 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:46,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 03:39:46,330 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 225571355, now seen corresponding path program 3 times [2022-02-15 03:39:46,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:46,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586757948] [2022-02-15 03:39:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:46,332 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:46,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:46,333 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:46,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:46,739 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 03:39:46,739 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:46,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586757948] [2022-02-15 03:39:46,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [586757948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:46,740 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:46,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:39:46,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558798353] [2022-02-15 03:39:46,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:46,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:39:46,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:46,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:39:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:39:46,741 INFO L87 Difference]: Start difference. First operand 211 states and 259 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:47,680 INFO L93 Difference]: Finished difference Result 269 states and 334 transitions. [2022-02-15 03:39:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:39:47,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:39:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:47,682 INFO L225 Difference]: With dead ends: 269 [2022-02-15 03:39:47,682 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 03:39:47,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:39:47,683 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 124 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:47,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 103 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 03:39:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-02-15 03:39:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2410714285714286) internal successors, (278), 224 states have internal predecessors, (278), 3 states have call successors, (3), 3 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 03:39:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2022-02-15 03:39:47,832 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 73 [2022-02-15 03:39:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:47,832 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2022-02-15 03:39:47,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2022-02-15 03:39:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:47,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:47,833 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 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 03:39:47,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 03:39:47,833 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash -167455655, now seen corresponding path program 1 times [2022-02-15 03:39:47,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:47,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190341650] [2022-02-15 03:39:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:47,835 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:47,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:47,837 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:48,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:48,177 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 03:39:48,178 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:48,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190341650] [2022-02-15 03:39:48,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190341650] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:48,178 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:48,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:48,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386698110] [2022-02-15 03:39:48,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:48,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:48,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:48,179 INFO L87 Difference]: Start difference. First operand 229 states and 282 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:48,755 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2022-02-15 03:39:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:39:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:39:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:48,756 INFO L225 Difference]: With dead ends: 286 [2022-02-15 03:39:48,756 INFO L226 Difference]: Without dead ends: 229 [2022-02-15 03:39:48,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:39:48,757 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:48,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 67 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-15 03:39:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-15 03:39:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2366071428571428) internal successors, (277), 224 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 281 transitions. [2022-02-15 03:39:48,903 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 281 transitions. Word has length 73 [2022-02-15 03:39:48,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:48,904 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 281 transitions. [2022-02-15 03:39:48,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 281 transitions. [2022-02-15 03:39:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:48,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:48,904 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:48,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 03:39:48,904 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:48,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash 51399063, now seen corresponding path program 2 times [2022-02-15 03:39:48,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:48,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085246439] [2022-02-15 03:39:48,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:48,906 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:48,907 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:49,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:49,209 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 03:39:49,210 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:49,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085246439] [2022-02-15 03:39:49,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085246439] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:49,210 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:49,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:39:49,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804012533] [2022-02-15 03:39:49,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:49,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:39:49,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:49,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:39:49,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:49,211 INFO L87 Difference]: Start difference. First operand 229 states and 281 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 03:39:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:49,832 INFO L93 Difference]: Finished difference Result 286 states and 353 transitions. [2022-02-15 03:39:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:39:49,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 73 [2022-02-15 03:39:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:49,833 INFO L225 Difference]: With dead ends: 286 [2022-02-15 03:39:49,833 INFO L226 Difference]: Without dead ends: 229 [2022-02-15 03:39:49,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:39:49,834 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 120 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:49,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 92 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-15 03:39:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-15 03:39:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2321428571428572) internal successors, (276), 224 states have internal predecessors, (276), 3 states have call successors, (3), 3 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 03:39:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 280 transitions. [2022-02-15 03:39:50,005 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 280 transitions. Word has length 73 [2022-02-15 03:39:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:50,005 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 280 transitions. [2022-02-15 03:39:50,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 03:39:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 280 transitions. [2022-02-15 03:39:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:50,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:50,006 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:50,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 03:39:50,006 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:50,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1637544679, now seen corresponding path program 3 times [2022-02-15 03:39:50,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:50,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386694140] [2022-02-15 03:39:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:50,008 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:50,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:50,009 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:50,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:50,399 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 03:39:50,399 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:50,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386694140] [2022-02-15 03:39:50,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1386694140] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:50,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:50,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:39:50,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750670587] [2022-02-15 03:39:50,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:50,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:39:50,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:39:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:39:50,400 INFO L87 Difference]: Start difference. First operand 229 states and 280 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:39:51,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:51,206 INFO L93 Difference]: Finished difference Result 286 states and 351 transitions. [2022-02-15 03:39:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:39:51,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:39:51,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:51,208 INFO L225 Difference]: With dead ends: 286 [2022-02-15 03:39:51,208 INFO L226 Difference]: Without dead ends: 229 [2022-02-15 03:39:51,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:39:51,209 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 145 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:51,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 99 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-15 03:39:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-15 03:39:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2276785714285714) internal successors, (275), 224 states have internal predecessors, (275), 3 states have call successors, (3), 3 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 03:39:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 279 transitions. [2022-02-15 03:39:51,356 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 279 transitions. Word has length 73 [2022-02-15 03:39:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:51,356 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 279 transitions. [2022-02-15 03:39:51,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:39:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 279 transitions. [2022-02-15 03:39:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:51,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:51,357 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:51,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 03:39:51,358 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2070616603, now seen corresponding path program 4 times [2022-02-15 03:39:51,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:51,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522104439] [2022-02-15 03:39:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:51,359 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:51,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:51,361 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:51,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:51,698 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 03:39:51,698 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:51,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522104439] [2022-02-15 03:39:51,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522104439] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:51,699 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:51,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:39:51,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935176104] [2022-02-15 03:39:51,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:51,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:39:51,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:51,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:39:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:51,700 INFO L87 Difference]: Start difference. First operand 229 states and 279 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 03:39:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:52,425 INFO L93 Difference]: Finished difference Result 286 states and 349 transitions. [2022-02-15 03:39:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:39:52,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 73 [2022-02-15 03:39:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:52,426 INFO L225 Difference]: With dead ends: 286 [2022-02-15 03:39:52,426 INFO L226 Difference]: Without dead ends: 229 [2022-02-15 03:39:52,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:39:52,427 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 120 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:52,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 97 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-15 03:39:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-15 03:39:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2232142857142858) internal successors, (274), 224 states have internal predecessors, (274), 3 states have call successors, (3), 3 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 03:39:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 278 transitions. [2022-02-15 03:39:52,580 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 278 transitions. Word has length 73 [2022-02-15 03:39:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:52,580 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 278 transitions. [2022-02-15 03:39:52,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 03:39:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 278 transitions. [2022-02-15 03:39:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:52,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:52,581 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:52,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 03:39:52,581 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1049548249, now seen corresponding path program 5 times [2022-02-15 03:39:52,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:52,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403724456] [2022-02-15 03:39:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:52,583 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:52,585 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:52,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:52,865 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 03:39:52,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:52,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403724456] [2022-02-15 03:39:52,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [403724456] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:52,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:52,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:39:52,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651341383] [2022-02-15 03:39:52,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:52,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:39:52,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:39:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:52,866 INFO L87 Difference]: Start difference. First operand 229 states and 278 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:39:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:53,377 INFO L93 Difference]: Finished difference Result 286 states and 347 transitions. [2022-02-15 03:39:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:39:53,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:39:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:53,380 INFO L225 Difference]: With dead ends: 286 [2022-02-15 03:39:53,380 INFO L226 Difference]: Without dead ends: 229 [2022-02-15 03:39:53,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:39:53,381 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:53,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 61 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-15 03:39:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-15 03:39:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.21875) internal successors, (273), 224 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 277 transitions. [2022-02-15 03:39:53,530 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 277 transitions. Word has length 73 [2022-02-15 03:39:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:53,530 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 277 transitions. [2022-02-15 03:39:53,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:39:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 277 transitions. [2022-02-15 03:39:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:53,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:53,531 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:53,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 03:39:53,531 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1190096859, now seen corresponding path program 6 times [2022-02-15 03:39:53,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:53,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7344829] [2022-02-15 03:39:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:53,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:53,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:53,534 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:53,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:53,857 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 03:39:53,857 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:53,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7344829] [2022-02-15 03:39:53,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [7344829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:53,858 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:53,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:53,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662896245] [2022-02-15 03:39:53,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:53,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:53,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:53,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:53,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:53,858 INFO L87 Difference]: Start difference. First operand 229 states and 277 transitions. Second operand has 12 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 03:39:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:54,371 INFO L93 Difference]: Finished difference Result 293 states and 354 transitions. [2022-02-15 03:39:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:39:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 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 73 [2022-02-15 03:39:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:54,372 INFO L225 Difference]: With dead ends: 293 [2022-02-15 03:39:54,372 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 03:39:54,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:39:54,373 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:54,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 03:39:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-02-15 03:39:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.2173913043478262) internal successors, (280), 230 states have internal predecessors, (280), 3 states have call successors, (3), 3 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 03:39:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 284 transitions. [2022-02-15 03:39:54,589 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 284 transitions. Word has length 73 [2022-02-15 03:39:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:54,589 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 284 transitions. [2022-02-15 03:39:54,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 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 03:39:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 284 transitions. [2022-02-15 03:39:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:54,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:54,590 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 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 03:39:54,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 03:39:54,590 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:54,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:54,591 INFO L85 PathProgramCache]: Analyzing trace with hash -283901735, now seen corresponding path program 7 times [2022-02-15 03:39:54,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:54,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234252318] [2022-02-15 03:39:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:54,592 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:54,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:54,594 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:54,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:54,969 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 03:39:54,970 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:54,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234252318] [2022-02-15 03:39:54,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234252318] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:54,970 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:54,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:39:54,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899531919] [2022-02-15 03:39:54,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:54,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:39:54,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:39:54,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:39:54,971 INFO L87 Difference]: Start difference. First operand 235 states and 284 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:55,966 INFO L93 Difference]: Finished difference Result 305 states and 368 transitions. [2022-02-15 03:39:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:39:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:39:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:55,968 INFO L225 Difference]: With dead ends: 305 [2022-02-15 03:39:55,968 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 03:39:55,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:39:55,969 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 213 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:55,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 107 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 03:39:56,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2022-02-15 03:39:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.2188841201716738) internal successors, (284), 233 states have internal predecessors, (284), 3 states have call successors, (3), 3 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 03:39:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 288 transitions. [2022-02-15 03:39:56,134 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 288 transitions. Word has length 73 [2022-02-15 03:39:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:56,135 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 288 transitions. [2022-02-15 03:39:56,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 288 transitions. [2022-02-15 03:39:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:56,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:56,136 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:56,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 03:39:56,137 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash -676928745, now seen corresponding path program 8 times [2022-02-15 03:39:56,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:56,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422972028] [2022-02-15 03:39:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:56,138 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:56,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:56,141 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:56,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:56,506 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 03:39:56,506 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:56,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422972028] [2022-02-15 03:39:56,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1422972028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:56,506 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:56,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:39:56,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212642005] [2022-02-15 03:39:56,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:56,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:39:56,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:56,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:39:56,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:39:56,507 INFO L87 Difference]: Start difference. First operand 238 states and 288 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:39:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:57,431 INFO L93 Difference]: Finished difference Result 318 states and 385 transitions. [2022-02-15 03:39:57,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:39:57,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:39:57,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:57,432 INFO L225 Difference]: With dead ends: 318 [2022-02-15 03:39:57,432 INFO L226 Difference]: Without dead ends: 252 [2022-02-15 03:39:57,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:39:57,433 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 153 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:57,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 105 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:57,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-15 03:39:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2022-02-15 03:39:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.21900826446281) internal successors, (295), 242 states have internal predecessors, (295), 3 states have call successors, (3), 3 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 03:39:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 299 transitions. [2022-02-15 03:39:57,588 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 299 transitions. Word has length 73 [2022-02-15 03:39:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:57,589 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 299 transitions. [2022-02-15 03:39:57,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:39:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 299 transitions. [2022-02-15 03:39:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:57,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:57,590 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:57,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 03:39:57,590 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:57,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1263734759, now seen corresponding path program 9 times [2022-02-15 03:39:57,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:57,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097766541] [2022-02-15 03:39:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:57,592 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:57,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:57,594 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:57,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:57,957 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 03:39:57,957 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:57,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097766541] [2022-02-15 03:39:57,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097766541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:57,957 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:57,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:57,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384540999] [2022-02-15 03:39:57,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:57,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:57,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:57,958 INFO L87 Difference]: Start difference. First operand 247 states and 299 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 03:39:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:58,666 INFO L93 Difference]: Finished difference Result 333 states and 403 transitions. [2022-02-15 03:39:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:39:58,666 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 73 [2022-02-15 03:39:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:58,668 INFO L225 Difference]: With dead ends: 333 [2022-02-15 03:39:58,668 INFO L226 Difference]: Without dead ends: 258 [2022-02-15 03:39:58,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:58,668 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:58,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 91 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-15 03:39:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2022-02-15 03:39:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2151394422310757) internal successors, (305), 251 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 309 transitions. [2022-02-15 03:39:58,863 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 309 transitions. Word has length 73 [2022-02-15 03:39:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:58,864 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 309 transitions. [2022-02-15 03:39:58,864 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 03:39:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 309 transitions. [2022-02-15 03:39:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:39:58,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:58,865 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:58,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 03:39:58,865 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1342288795, now seen corresponding path program 10 times [2022-02-15 03:39:58,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:58,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428257230] [2022-02-15 03:39:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:58,867 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:58,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:58,869 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:59,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:59,211 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 03:39:59,211 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:59,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428257230] [2022-02-15 03:39:59,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [428257230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:59,212 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:59,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:39:59,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540208077] [2022-02-15 03:39:59,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:59,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:39:59,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:39:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:59,213 INFO L87 Difference]: Start difference. First operand 256 states and 309 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 03:40:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:00,057 INFO L93 Difference]: Finished difference Result 340 states and 409 transitions. [2022-02-15 03:40:00,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:40:00,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 73 [2022-02-15 03:40:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:00,058 INFO L225 Difference]: With dead ends: 340 [2022-02-15 03:40:00,059 INFO L226 Difference]: Without dead ends: 256 [2022-02-15 03:40:00,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:40:00,059 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:00,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 87 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:40:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-15 03:40:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-02-15 03:40:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2111553784860558) internal successors, (304), 251 states have internal predecessors, (304), 3 states have call successors, (3), 3 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 03:40:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 308 transitions. [2022-02-15 03:40:00,297 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 308 transitions. Word has length 73 [2022-02-15 03:40:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:00,297 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 308 transitions. [2022-02-15 03:40:00,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 03:40:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 308 transitions. [2022-02-15 03:40:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:00,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:00,298 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:00,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 03:40:00,299 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:00,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:00,299 INFO L85 PathProgramCache]: Analyzing trace with hash 714247451, now seen corresponding path program 11 times [2022-02-15 03:40:00,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:00,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363216844] [2022-02-15 03:40:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:00,300 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:00,302 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:00,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:00,712 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 03:40:00,712 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:00,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363216844] [2022-02-15 03:40:00,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [363216844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:00,713 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:00,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:40:00,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6551495] [2022-02-15 03:40:00,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:00,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:40:00,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:40:00,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:40:00,714 INFO L87 Difference]: Start difference. First operand 256 states and 308 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:01,675 INFO L93 Difference]: Finished difference Result 362 states and 433 transitions. [2022-02-15 03:40:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:40:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:01,676 INFO L225 Difference]: With dead ends: 362 [2022-02-15 03:40:01,676 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 03:40:01,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:40:01,677 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 185 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:01,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 88 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 03:40:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2022-02-15 03:40:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2151394422310757) internal successors, (305), 251 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 309 transitions. [2022-02-15 03:40:01,839 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 309 transitions. Word has length 73 [2022-02-15 03:40:01,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:01,840 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 309 transitions. [2022-02-15 03:40:01,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:01,840 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 309 transitions. [2022-02-15 03:40:01,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:01,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:01,840 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:01,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 03:40:01,841 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash 321220441, now seen corresponding path program 12 times [2022-02-15 03:40:01,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:01,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772784307] [2022-02-15 03:40:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:01,842 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:01,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:01,844 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:02,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:02,176 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 03:40:02,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:02,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772784307] [2022-02-15 03:40:02,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [772784307] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:02,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:02,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:40:02,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534979421] [2022-02-15 03:40:02,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:02,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:40:02,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:02,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:40:02,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:40:02,178 INFO L87 Difference]: Start difference. First operand 256 states and 309 transitions. Second operand has 14 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 03:40:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:02,865 INFO L93 Difference]: Finished difference Result 340 states and 409 transitions. [2022-02-15 03:40:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:40:02,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 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 73 [2022-02-15 03:40:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:02,866 INFO L225 Difference]: With dead ends: 340 [2022-02-15 03:40:02,866 INFO L226 Difference]: Without dead ends: 256 [2022-02-15 03:40:02,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:40:02,867 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 131 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:02,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 85 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:40:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-15 03:40:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-02-15 03:40:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2111553784860558) internal successors, (304), 251 states have internal predecessors, (304), 3 states have call successors, (3), 3 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 03:40:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 308 transitions. [2022-02-15 03:40:03,035 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 308 transitions. Word has length 73 [2022-02-15 03:40:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:03,035 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 308 transitions. [2022-02-15 03:40:03,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 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 03:40:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 308 transitions. [2022-02-15 03:40:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:03,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:03,036 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:03,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 03:40:03,036 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2147017769, now seen corresponding path program 13 times [2022-02-15 03:40:03,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:03,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867021892] [2022-02-15 03:40:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:03,038 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:03,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:03,040 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:03,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:03,424 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 03:40:03,424 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:03,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867021892] [2022-02-15 03:40:03,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [867021892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:03,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:03,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:40:03,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103609736] [2022-02-15 03:40:03,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:03,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:40:03,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:40:03,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:40:03,426 INFO L87 Difference]: Start difference. First operand 256 states and 308 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:40:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:04,299 INFO L93 Difference]: Finished difference Result 344 states and 412 transitions. [2022-02-15 03:40:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:40:04,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:04,300 INFO L225 Difference]: With dead ends: 344 [2022-02-15 03:40:04,300 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 03:40:04,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:40:04,301 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 230 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:04,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 77 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 03:40:04,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2022-02-15 03:40:04,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2111553784860558) internal successors, (304), 251 states have internal predecessors, (304), 3 states have call successors, (3), 3 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 03:40:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 308 transitions. [2022-02-15 03:40:04,470 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 308 transitions. Word has length 73 [2022-02-15 03:40:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:04,470 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 308 transitions. [2022-02-15 03:40:04,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:40:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 308 transitions. [2022-02-15 03:40:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:04,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:04,471 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:04,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 03:40:04,471 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1561143513, now seen corresponding path program 14 times [2022-02-15 03:40:04,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:04,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705588699] [2022-02-15 03:40:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:04,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:04,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:04,475 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:04,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:04,786 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 03:40:04,787 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:04,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705588699] [2022-02-15 03:40:04,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [705588699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:04,787 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:04,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:40:04,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086116271] [2022-02-15 03:40:04,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:04,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:40:04,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:40:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:40:04,787 INFO L87 Difference]: Start difference. First operand 256 states and 308 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 03:40:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:05,526 INFO L93 Difference]: Finished difference Result 340 states and 407 transitions. [2022-02-15 03:40:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:40:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 73 [2022-02-15 03:40:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:05,527 INFO L225 Difference]: With dead ends: 340 [2022-02-15 03:40:05,527 INFO L226 Difference]: Without dead ends: 256 [2022-02-15 03:40:05,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:40:05,528 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 170 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:05,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 83 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:40:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-15 03:40:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-02-15 03:40:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.207171314741036) internal successors, (303), 251 states have internal predecessors, (303), 3 states have call successors, (3), 3 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 03:40:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 307 transitions. [2022-02-15 03:40:05,704 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 307 transitions. Word has length 73 [2022-02-15 03:40:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:05,704 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 307 transitions. [2022-02-15 03:40:05,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 03:40:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 307 transitions. [2022-02-15 03:40:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:05,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:05,705 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:05,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 03:40:05,705 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:05,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1126881173, now seen corresponding path program 15 times [2022-02-15 03:40:05,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:05,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406072517] [2022-02-15 03:40:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:05,706 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:05,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:05,708 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:06,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:06,062 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 03:40:06,062 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:06,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406072517] [2022-02-15 03:40:06,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [406072517] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:06,062 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:06,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:40:06,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871853317] [2022-02-15 03:40:06,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:06,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:40:06,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:06,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:40:06,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:40:06,063 INFO L87 Difference]: Start difference. First operand 256 states and 307 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:40:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:06,851 INFO L93 Difference]: Finished difference Result 341 states and 406 transitions. [2022-02-15 03:40:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:40:06,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:06,852 INFO L225 Difference]: With dead ends: 341 [2022-02-15 03:40:06,852 INFO L226 Difference]: Without dead ends: 257 [2022-02-15 03:40:06,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:40:06,853 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 175 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:06,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 84 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:40:06,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-15 03:40:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 244. [2022-02-15 03:40:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.213389121338912) internal successors, (290), 239 states have internal predecessors, (290), 3 states have call successors, (3), 3 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 03:40:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 294 transitions. [2022-02-15 03:40:07,014 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 294 transitions. Word has length 73 [2022-02-15 03:40:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:07,015 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 294 transitions. [2022-02-15 03:40:07,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:40:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 294 transitions. [2022-02-15 03:40:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:07,015 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:07,015 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:07,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 03:40:07,016 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash 540075159, now seen corresponding path program 16 times [2022-02-15 03:40:07,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:07,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269274273] [2022-02-15 03:40:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:07,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:07,019 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:07,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:07,417 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 03:40:07,417 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:07,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269274273] [2022-02-15 03:40:07,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [269274273] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:07,418 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:07,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:40:07,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669324308] [2022-02-15 03:40:07,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:07,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:40:07,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:40:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:40:07,419 INFO L87 Difference]: Start difference. First operand 244 states and 294 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:40:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:08,011 INFO L93 Difference]: Finished difference Result 320 states and 384 transitions. [2022-02-15 03:40:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:40:08,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:08,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:08,013 INFO L225 Difference]: With dead ends: 320 [2022-02-15 03:40:08,013 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 03:40:08,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:40:08,013 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:08,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 76 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:40:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 03:40:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-02-15 03:40:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2107438016528926) internal successors, (293), 242 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2022-02-15 03:40:08,177 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 73 [2022-02-15 03:40:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:08,177 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2022-02-15 03:40:08,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:40:08,177 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2022-02-15 03:40:08,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:08,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:08,177 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:08,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 03:40:08,178 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:08,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:08,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1751227493, now seen corresponding path program 17 times [2022-02-15 03:40:08,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:08,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529442494] [2022-02-15 03:40:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:08,179 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:08,181 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:08,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:08,553 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 03:40:08,553 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:08,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529442494] [2022-02-15 03:40:08,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1529442494] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:08,554 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:08,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:40:08,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283668332] [2022-02-15 03:40:08,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:08,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:40:08,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:40:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:40:08,555 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:09,508 INFO L93 Difference]: Finished difference Result 344 states and 410 transitions. [2022-02-15 03:40:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:40:09,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:09,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:09,509 INFO L225 Difference]: With dead ends: 344 [2022-02-15 03:40:09,509 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 03:40:09,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:40:09,509 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 169 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:09,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 105 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 03:40:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 253. [2022-02-15 03:40:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.2137096774193548) internal successors, (301), 248 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 305 transitions. [2022-02-15 03:40:09,682 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 305 transitions. Word has length 73 [2022-02-15 03:40:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:09,682 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 305 transitions. [2022-02-15 03:40:09,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 305 transitions. [2022-02-15 03:40:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:09,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:09,683 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:09,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 03:40:09,683 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2144254503, now seen corresponding path program 18 times [2022-02-15 03:40:09,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:09,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161970431] [2022-02-15 03:40:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:09,684 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:09,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:09,685 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:09,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:09,990 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 03:40:09,990 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:09,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161970431] [2022-02-15 03:40:09,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [161970431] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:09,990 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:09,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:40:09,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035815333] [2022-02-15 03:40:09,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:09,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:40:09,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:09,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:40:09,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:40:09,991 INFO L87 Difference]: Start difference. First operand 253 states and 305 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:10,666 INFO L93 Difference]: Finished difference Result 334 states and 401 transitions. [2022-02-15 03:40:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:40:10,666 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:10,667 INFO L225 Difference]: With dead ends: 334 [2022-02-15 03:40:10,668 INFO L226 Difference]: Without dead ends: 253 [2022-02-15 03:40:10,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:40:10,668 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 147 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:10,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 89 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:40:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-15 03:40:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-02-15 03:40:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.2096774193548387) internal successors, (300), 248 states have internal predecessors, (300), 3 states have call successors, (3), 3 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 03:40:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 304 transitions. [2022-02-15 03:40:10,837 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 304 transitions. Word has length 73 [2022-02-15 03:40:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:10,837 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 304 transitions. [2022-02-15 03:40:10,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 304 transitions. [2022-02-15 03:40:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:10,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:10,838 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:10,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 03:40:10,838 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:10,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:10,839 INFO L85 PathProgramCache]: Analyzing trace with hash 854796061, now seen corresponding path program 19 times [2022-02-15 03:40:10,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:10,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975164546] [2022-02-15 03:40:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:10,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:10,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:10,845 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:11,222 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 03:40:11,222 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:11,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975164546] [2022-02-15 03:40:11,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975164546] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:11,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:11,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:40:11,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076224298] [2022-02-15 03:40:11,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:11,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:40:11,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:11,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:40:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:40:11,223 INFO L87 Difference]: Start difference. First operand 253 states and 304 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:12,153 INFO L93 Difference]: Finished difference Result 338 states and 404 transitions. [2022-02-15 03:40:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:40:12,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:12,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:12,154 INFO L225 Difference]: With dead ends: 338 [2022-02-15 03:40:12,155 INFO L226 Difference]: Without dead ends: 257 [2022-02-15 03:40:12,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:40:12,155 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 201 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:12,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 84 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-15 03:40:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 244. [2022-02-15 03:40:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.217573221757322) internal successors, (291), 239 states have internal predecessors, (291), 3 states have call successors, (3), 3 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 03:40:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 295 transitions. [2022-02-15 03:40:12,313 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 295 transitions. Word has length 73 [2022-02-15 03:40:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:12,313 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 295 transitions. [2022-02-15 03:40:12,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 295 transitions. [2022-02-15 03:40:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:12,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:12,314 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:12,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 03:40:12,314 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:12,315 INFO L85 PathProgramCache]: Analyzing trace with hash 461769051, now seen corresponding path program 20 times [2022-02-15 03:40:12,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:12,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875659224] [2022-02-15 03:40:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:12,316 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:12,318 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:12,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:12,717 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 03:40:12,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:12,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875659224] [2022-02-15 03:40:12,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875659224] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:12,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:12,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:40:12,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212631672] [2022-02-15 03:40:12,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:12,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:40:12,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:40:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:40:12,719 INFO L87 Difference]: Start difference. First operand 244 states and 295 transitions. Second operand has 14 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 03:40:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:13,376 INFO L93 Difference]: Finished difference Result 320 states and 386 transitions. [2022-02-15 03:40:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:40:13,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 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 73 [2022-02-15 03:40:13,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:13,377 INFO L225 Difference]: With dead ends: 320 [2022-02-15 03:40:13,377 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 03:40:13,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:40:13,378 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 117 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:13,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 69 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:40:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 03:40:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-02-15 03:40:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2148760330578512) internal successors, (294), 242 states have internal predecessors, (294), 3 states have call successors, (3), 3 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 03:40:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 298 transitions. [2022-02-15 03:40:13,556 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 298 transitions. Word has length 73 [2022-02-15 03:40:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:13,556 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 298 transitions. [2022-02-15 03:40:13,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 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 03:40:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 298 transitions. [2022-02-15 03:40:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:13,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:13,557 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:13,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 03:40:13,557 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash -904331431, now seen corresponding path program 21 times [2022-02-15 03:40:13,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:13,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434975869] [2022-02-15 03:40:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:13,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:13,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:13,560 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:13,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:13,982 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 03:40:13,982 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:13,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434975869] [2022-02-15 03:40:13,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434975869] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:13,982 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:13,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:40:13,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373608092] [2022-02-15 03:40:13,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:13,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:40:13,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:13,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:40:13,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:40:13,983 INFO L87 Difference]: Start difference. First operand 247 states and 298 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 03:40:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:14,710 INFO L93 Difference]: Finished difference Result 322 states and 387 transitions. [2022-02-15 03:40:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:40:14,710 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 73 [2022-02-15 03:40:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:14,711 INFO L225 Difference]: With dead ends: 322 [2022-02-15 03:40:14,711 INFO L226 Difference]: Without dead ends: 247 [2022-02-15 03:40:14,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:40:14,711 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 151 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:14,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 77 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:40:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-15 03:40:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-02-15 03:40:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2107438016528926) internal successors, (293), 242 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2022-02-15 03:40:14,897 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 73 [2022-02-15 03:40:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:14,897 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2022-02-15 03:40:14,897 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 03:40:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2022-02-15 03:40:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:14,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:14,898 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:14,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 03:40:14,898 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1338593771, now seen corresponding path program 22 times [2022-02-15 03:40:14,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:14,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569843] [2022-02-15 03:40:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:14,899 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:14,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:14,901 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:15,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:15,280 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 03:40:15,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:15,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569843] [2022-02-15 03:40:15,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [569843] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:15,281 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:15,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:40:15,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998160021] [2022-02-15 03:40:15,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:15,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:40:15,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:40:15,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:40:15,281 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:40:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:16,097 INFO L93 Difference]: Finished difference Result 323 states and 386 transitions. [2022-02-15 03:40:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:40:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:16,098 INFO L225 Difference]: With dead ends: 323 [2022-02-15 03:40:16,098 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 03:40:16,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:40:16,098 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 165 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:16,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 98 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:40:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 03:40:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 241. [2022-02-15 03:40:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.2118644067796611) internal successors, (286), 236 states have internal predecessors, (286), 3 states have call successors, (3), 3 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 03:40:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 290 transitions. [2022-02-15 03:40:16,252 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 290 transitions. Word has length 73 [2022-02-15 03:40:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:16,252 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 290 transitions. [2022-02-15 03:40:16,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:40:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 290 transitions. [2022-02-15 03:40:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:16,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:16,258 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:16,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 03:40:16,258 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:16,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1925399785, now seen corresponding path program 23 times [2022-02-15 03:40:16,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:16,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818004218] [2022-02-15 03:40:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:16,260 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:16,262 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:16,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:16,624 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 03:40:16,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:16,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818004218] [2022-02-15 03:40:16,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [818004218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:16,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:16,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:40:16,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776640430] [2022-02-15 03:40:16,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:16,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:40:16,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:40:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:40:16,625 INFO L87 Difference]: Start difference. First operand 241 states and 290 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:17,311 INFO L93 Difference]: Finished difference Result 314 states and 376 transitions. [2022-02-15 03:40:17,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:40:17,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:17,312 INFO L225 Difference]: With dead ends: 314 [2022-02-15 03:40:17,312 INFO L226 Difference]: Without dead ends: 245 [2022-02-15 03:40:17,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:40:17,313 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 117 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:17,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 74 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:40:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-15 03:40:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-02-15 03:40:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.209205020920502) internal successors, (289), 239 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 293 transitions. [2022-02-15 03:40:17,477 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 293 transitions. Word has length 73 [2022-02-15 03:40:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:17,477 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 293 transitions. [2022-02-15 03:40:17,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 293 transitions. [2022-02-15 03:40:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:17,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:17,478 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:17,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 03:40:17,478 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:17,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:17,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1701692123, now seen corresponding path program 24 times [2022-02-15 03:40:17,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:17,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087471688] [2022-02-15 03:40:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:17,480 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:17,482 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:17,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:17,869 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 03:40:17,870 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:17,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087471688] [2022-02-15 03:40:17,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087471688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:17,870 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:17,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:40:17,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981446501] [2022-02-15 03:40:17,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:17,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:40:17,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:17,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:40:17,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:40:17,871 INFO L87 Difference]: Start difference. First operand 244 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 03:40:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:18,647 INFO L93 Difference]: Finished difference Result 320 states and 382 transitions. [2022-02-15 03:40:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:40:18,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 73 [2022-02-15 03:40:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:18,648 INFO L225 Difference]: With dead ends: 320 [2022-02-15 03:40:18,649 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 03:40:18,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:40:18,649 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:18,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 91 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:40:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 03:40:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-02-15 03:40:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2066115702479339) internal successors, (292), 242 states have internal predecessors, (292), 3 states have call successors, (3), 3 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 03:40:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 296 transitions. [2022-02-15 03:40:18,823 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 296 transitions. Word has length 73 [2022-02-15 03:40:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:18,823 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 296 transitions. [2022-02-15 03:40:18,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 03:40:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 296 transitions. [2022-02-15 03:40:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:18,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:18,824 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:18,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 03:40:18,824 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1660456793, now seen corresponding path program 25 times [2022-02-15 03:40:18,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:18,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352322881] [2022-02-15 03:40:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:18,825 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:18,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:18,826 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:19,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:19,133 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 03:40:19,133 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:19,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352322881] [2022-02-15 03:40:19,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [352322881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:19,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:19,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:40:19,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887787381] [2022-02-15 03:40:19,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:40:19,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:40:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:40:19,134 INFO L87 Difference]: Start difference. First operand 247 states and 296 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:20,084 INFO L93 Difference]: Finished difference Result 330 states and 393 transitions. [2022-02-15 03:40:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:40:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:20,085 INFO L225 Difference]: With dead ends: 330 [2022-02-15 03:40:20,085 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 03:40:20,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:40:20,085 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 183 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:20,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 102 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 03:40:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 247. [2022-02-15 03:40:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2066115702479339) internal successors, (292), 242 states have internal predecessors, (292), 3 states have call successors, (3), 3 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 03:40:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 296 transitions. [2022-02-15 03:40:20,327 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 296 transitions. Word has length 73 [2022-02-15 03:40:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:20,327 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 296 transitions. [2022-02-15 03:40:20,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 296 transitions. [2022-02-15 03:40:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:20,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:20,327 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:20,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 03:40:20,328 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1267429783, now seen corresponding path program 26 times [2022-02-15 03:40:20,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:20,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342296377] [2022-02-15 03:40:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:20,329 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:20,331 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:20,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:20,762 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 03:40:20,762 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:20,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342296377] [2022-02-15 03:40:20,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342296377] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:20,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:20,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:40:20,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3137002] [2022-02-15 03:40:20,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:20,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:40:20,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:20,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:40:20,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:40:20,763 INFO L87 Difference]: Start difference. First operand 247 states and 296 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:40:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:21,618 INFO L93 Difference]: Finished difference Result 326 states and 388 transitions. [2022-02-15 03:40:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:40:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:21,619 INFO L225 Difference]: With dead ends: 326 [2022-02-15 03:40:21,619 INFO L226 Difference]: Without dead ends: 251 [2022-02-15 03:40:21,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:40:21,620 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 117 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:21,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 84 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:40:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-15 03:40:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-02-15 03:40:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.2040816326530612) internal successors, (295), 245 states have internal predecessors, (295), 3 states have call successors, (3), 3 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 03:40:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 299 transitions. [2022-02-15 03:40:21,788 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 299 transitions. Word has length 73 [2022-02-15 03:40:21,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:21,788 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 299 transitions. [2022-02-15 03:40:21,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:40:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 299 transitions. [2022-02-15 03:40:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:21,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:21,788 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:21,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 03:40:21,789 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1073650779, now seen corresponding path program 27 times [2022-02-15 03:40:21,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:21,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575653533] [2022-02-15 03:40:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:21,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:21,792 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:22,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:22,361 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 03:40:22,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:22,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575653533] [2022-02-15 03:40:22,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1575653533] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:22,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:22,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:40:22,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202765914] [2022-02-15 03:40:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:22,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:40:22,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:22,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:40:22,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:40:22,363 INFO L87 Difference]: Start difference. First operand 250 states and 299 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:23,451 INFO L93 Difference]: Finished difference Result 386 states and 454 transitions. [2022-02-15 03:40:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:40:23,455 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:23,456 INFO L225 Difference]: With dead ends: 386 [2022-02-15 03:40:23,456 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 03:40:23,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:40:23,457 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 109 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:23,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 105 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:40:23,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 03:40:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 271. [2022-02-15 03:40:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.2105263157894737) internal successors, (322), 266 states have internal predecessors, (322), 3 states have call successors, (3), 3 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 03:40:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 326 transitions. [2022-02-15 03:40:23,646 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 326 transitions. Word has length 73 [2022-02-15 03:40:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:23,646 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 326 transitions. [2022-02-15 03:40:23,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 326 transitions. [2022-02-15 03:40:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:23,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:23,647 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:23,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 03:40:23,647 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:23,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash 680623769, now seen corresponding path program 28 times [2022-02-15 03:40:23,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:23,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340629382] [2022-02-15 03:40:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:23,648 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:23,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:23,649 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:23,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:23,845 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 03:40:23,846 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:23,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340629382] [2022-02-15 03:40:23,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [340629382] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:23,846 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:23,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:40:23,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703061290] [2022-02-15 03:40:23,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:23,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:40:23,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:40:23,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:40:23,847 INFO L87 Difference]: Start difference. First operand 271 states and 326 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:24,192 INFO L93 Difference]: Finished difference Result 407 states and 491 transitions. [2022-02-15 03:40:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:40:24,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 03:40:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:24,193 INFO L225 Difference]: With dead ends: 407 [2022-02-15 03:40:24,193 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 03:40:24,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:40:24,194 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:24,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 55 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:40:24,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 03:40:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-02-15 03:40:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.2083333333333333) internal successors, (319), 264 states have internal predecessors, (319), 3 states have call successors, (3), 3 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 03:40:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 323 transitions. [2022-02-15 03:40:24,390 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 323 transitions. Word has length 73 [2022-02-15 03:40:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:24,390 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 323 transitions. [2022-02-15 03:40:24,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 323 transitions. [2022-02-15 03:40:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 03:40:24,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:24,391 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 03:40:24,391 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:24,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1813973492, now seen corresponding path program 1 times [2022-02-15 03:40:24,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:24,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665434469] [2022-02-15 03:40:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:24,392 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:24,394 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:24,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:24,460 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 03:40:24,460 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:24,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665434469] [2022-02-15 03:40:24,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1665434469] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:24,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:24,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:40:24,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267736238] [2022-02-15 03:40:24,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:24,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:40:24,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:40:24,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:40:24,462 INFO L87 Difference]: Start difference. First operand 269 states and 323 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 03:40:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:25,557 INFO L93 Difference]: Finished difference Result 1281 states and 1560 transitions. [2022-02-15 03:40:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:40:25,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 75 [2022-02-15 03:40:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:25,560 INFO L225 Difference]: With dead ends: 1281 [2022-02-15 03:40:25,560 INFO L226 Difference]: Without dead ends: 1147 [2022-02-15 03:40:25,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:40:25,561 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 142 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:25,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 56 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:40:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-02-15 03:40:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 275. [2022-02-15 03:40:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.211111111111111) internal successors, (327), 270 states have internal predecessors, (327), 3 states have call successors, (3), 3 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 03:40:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 331 transitions. [2022-02-15 03:40:25,803 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 331 transitions. Word has length 75 [2022-02-15 03:40:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:25,804 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 331 transitions. [2022-02-15 03:40:25,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 03:40:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 331 transitions. [2022-02-15 03:40:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 03:40:25,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:25,804 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:25,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 03:40:25,804 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:25,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1665765482, now seen corresponding path program 2 times [2022-02-15 03:40:25,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:25,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998769579] [2022-02-15 03:40:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:25,806 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:25,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:25,807 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:25,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:25,888 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 03:40:25,888 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:25,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998769579] [2022-02-15 03:40:25,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1998769579] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:25,889 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:25,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:40:25,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386009177] [2022-02-15 03:40:25,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:25,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:40:25,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:25,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:40:25,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:40:25,890 INFO L87 Difference]: Start difference. First operand 275 states and 331 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 03:40:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:27,167 INFO L93 Difference]: Finished difference Result 1314 states and 1603 transitions. [2022-02-15 03:40:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:40:27,167 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 79 [2022-02-15 03:40:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:27,170 INFO L225 Difference]: With dead ends: 1314 [2022-02-15 03:40:27,170 INFO L226 Difference]: Without dead ends: 1180 [2022-02-15 03:40:27,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:40:27,171 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:27,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 104 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:40:27,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-02-15 03:40:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 277. [2022-02-15 03:40:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.213235294117647) internal successors, (330), 272 states have internal predecessors, (330), 3 states have call successors, (3), 3 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 03:40:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2022-02-15 03:40:27,407 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 79 [2022-02-15 03:40:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:27,407 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2022-02-15 03:40:27,407 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 03:40:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2022-02-15 03:40:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 03:40:27,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:27,408 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:27,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 03:40:27,408 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:27,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:27,408 INFO L85 PathProgramCache]: Analyzing trace with hash -652612731, now seen corresponding path program 3 times [2022-02-15 03:40:27,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:27,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324997418] [2022-02-15 03:40:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:27,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:27,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:27,410 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:27,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:27,487 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 03:40:27,487 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:27,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324997418] [2022-02-15 03:40:27,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [324997418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:27,487 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:27,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:40:27,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800743417] [2022-02-15 03:40:27,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:27,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:40:27,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:40:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:40:27,488 INFO L87 Difference]: Start difference. First operand 277 states and 334 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:29,084 INFO L93 Difference]: Finished difference Result 1550 states and 1893 transitions. [2022-02-15 03:40:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:40:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-02-15 03:40:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:29,087 INFO L225 Difference]: With dead ends: 1550 [2022-02-15 03:40:29,087 INFO L226 Difference]: Without dead ends: 1416 [2022-02-15 03:40:29,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:40:29,088 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 175 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:29,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 123 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:40:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-02-15 03:40:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 279. [2022-02-15 03:40:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.2153284671532847) internal successors, (333), 274 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 337 transitions. [2022-02-15 03:40:29,356 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 337 transitions. Word has length 81 [2022-02-15 03:40:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:29,356 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 337 transitions. [2022-02-15 03:40:29,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 337 transitions. [2022-02-15 03:40:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:40:29,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:29,357 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:29,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 03:40:29,357 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash 473951200, now seen corresponding path program 4 times [2022-02-15 03:40:29,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:29,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363246089] [2022-02-15 03:40:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:29,359 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:29,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:29,360 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:29,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:29,468 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 03:40:29,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:29,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363246089] [2022-02-15 03:40:29,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363246089] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:29,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:29,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:40:29,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134811463] [2022-02-15 03:40:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:29,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:40:29,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:40:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:40:29,470 INFO L87 Difference]: Start difference. First operand 279 states and 337 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:31,482 INFO L93 Difference]: Finished difference Result 1786 states and 2183 transitions. [2022-02-15 03:40:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:40:31,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 03:40:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:31,486 INFO L225 Difference]: With dead ends: 1786 [2022-02-15 03:40:31,486 INFO L226 Difference]: Without dead ends: 1652 [2022-02-15 03:40:31,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:40:31,486 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 205 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:31,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 147 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:40:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2022-02-15 03:40:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 281. [2022-02-15 03:40:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.2173913043478262) internal successors, (336), 276 states have internal predecessors, (336), 3 states have call successors, (3), 3 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 03:40:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 340 transitions. [2022-02-15 03:40:31,747 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 340 transitions. Word has length 83 [2022-02-15 03:40:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:31,747 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 340 transitions. [2022-02-15 03:40:31,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 340 transitions. [2022-02-15 03:40:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 03:40:31,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:31,748 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:31,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 03:40:31,748 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:31,748 INFO L85 PathProgramCache]: Analyzing trace with hash 770130299, now seen corresponding path program 5 times [2022-02-15 03:40:31,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:31,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146570887] [2022-02-15 03:40:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:31,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:31,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:31,751 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:31,865 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 03:40:31,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:31,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146570887] [2022-02-15 03:40:31,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1146570887] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:31,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:31,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:40:31,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297285820] [2022-02-15 03:40:31,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:31,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:40:31,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:40:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:40:31,866 INFO L87 Difference]: Start difference. First operand 281 states and 340 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:34,374 INFO L93 Difference]: Finished difference Result 2022 states and 2473 transitions. [2022-02-15 03:40:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:40:34,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-15 03:40:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:34,379 INFO L225 Difference]: With dead ends: 2022 [2022-02-15 03:40:34,379 INFO L226 Difference]: Without dead ends: 1888 [2022-02-15 03:40:34,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:40:34,379 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 235 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:34,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 171 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:40:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-02-15 03:40:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 283. [2022-02-15 03:40:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.2194244604316546) internal successors, (339), 278 states have internal predecessors, (339), 3 states have call successors, (3), 3 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 03:40:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 343 transitions. [2022-02-15 03:40:34,645 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 343 transitions. Word has length 85 [2022-02-15 03:40:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:34,645 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 343 transitions. [2022-02-15 03:40:34,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 343 transitions. [2022-02-15 03:40:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-15 03:40:34,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:34,645 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 7, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:34,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 03:40:34,646 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:34,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1930402902, now seen corresponding path program 6 times [2022-02-15 03:40:34,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:34,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253602770] [2022-02-15 03:40:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:34,647 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:34,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:34,648 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:34,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:34,758 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 03:40:34,758 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:34,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253602770] [2022-02-15 03:40:34,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [253602770] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:34,758 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:34,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:40:34,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504352442] [2022-02-15 03:40:34,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:34,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:40:34,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:40:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:40:34,759 INFO L87 Difference]: Start difference. First operand 283 states and 343 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:40:37,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:37,667 INFO L93 Difference]: Finished difference Result 2258 states and 2763 transitions. [2022-02-15 03:40:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:40:37,668 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-02-15 03:40:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:37,674 INFO L225 Difference]: With dead ends: 2258 [2022-02-15 03:40:37,675 INFO L226 Difference]: Without dead ends: 2124 [2022-02-15 03:40:37,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:40:37,675 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 265 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:37,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 195 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-02-15 03:40:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 285. [2022-02-15 03:40:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.2214285714285715) internal successors, (342), 280 states have internal predecessors, (342), 3 states have call successors, (3), 3 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 03:40:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 346 transitions. [2022-02-15 03:40:37,964 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 346 transitions. Word has length 87 [2022-02-15 03:40:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:37,964 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 346 transitions. [2022-02-15 03:40:37,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 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 03:40:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 346 transitions. [2022-02-15 03:40:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 03:40:37,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:37,965 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:37,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 03:40:37,965 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash 260877425, now seen corresponding path program 7 times [2022-02-15 03:40:37,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:37,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819667039] [2022-02-15 03:40:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:37,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:37,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:37,969 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:38,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:38,097 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 03:40:38,097 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:38,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819667039] [2022-02-15 03:40:38,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819667039] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:38,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:38,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:40:38,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701277363] [2022-02-15 03:40:38,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:38,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:40:38,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:38,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:40:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:40:38,098 INFO L87 Difference]: Start difference. First operand 285 states and 346 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:41,555 INFO L93 Difference]: Finished difference Result 2494 states and 3053 transitions. [2022-02-15 03:40:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:40:41,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 03:40:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:41,561 INFO L225 Difference]: With dead ends: 2494 [2022-02-15 03:40:41,561 INFO L226 Difference]: Without dead ends: 2360 [2022-02-15 03:40:41,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:40:41,561 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 281 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:41,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 224 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:40:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2022-02-15 03:40:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 287. [2022-02-15 03:40:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.2234042553191489) internal successors, (345), 282 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 349 transitions. [2022-02-15 03:40:41,863 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 349 transitions. Word has length 89 [2022-02-15 03:40:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:41,863 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 349 transitions. [2022-02-15 03:40:41,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 349 transitions. [2022-02-15 03:40:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 03:40:41,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:41,864 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:41,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 03:40:41,865 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2130304564, now seen corresponding path program 8 times [2022-02-15 03:40:41,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:41,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689877669] [2022-02-15 03:40:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:41,866 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:41,868 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:42,009 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 03:40:42,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:42,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689877669] [2022-02-15 03:40:42,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689877669] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:42,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:42,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:40:42,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856827087] [2022-02-15 03:40:42,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:42,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:40:42,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:40:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:40:42,010 INFO L87 Difference]: Start difference. First operand 287 states and 349 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:46,029 INFO L93 Difference]: Finished difference Result 2730 states and 3343 transitions. [2022-02-15 03:40:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:40:46,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-02-15 03:40:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:46,037 INFO L225 Difference]: With dead ends: 2730 [2022-02-15 03:40:46,037 INFO L226 Difference]: Without dead ends: 2596 [2022-02-15 03:40:46,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:40:46,038 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 325 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:46,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 243 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:40:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2022-02-15 03:40:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 289. [2022-02-15 03:40:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.2253521126760563) internal successors, (348), 284 states have internal predecessors, (348), 3 states have call successors, (3), 3 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 03:40:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 352 transitions. [2022-02-15 03:40:46,361 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 352 transitions. Word has length 91 [2022-02-15 03:40:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:46,361 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 352 transitions. [2022-02-15 03:40:46,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 352 transitions. [2022-02-15 03:40:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 03:40:46,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:46,361 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:46,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 03:40:46,362 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:46,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2046274663, now seen corresponding path program 9 times [2022-02-15 03:40:46,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:46,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877251434] [2022-02-15 03:40:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:46,363 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:46,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:46,365 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:46,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:46,542 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 03:40:46,543 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:46,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877251434] [2022-02-15 03:40:46,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877251434] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:46,543 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:46,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:40:46,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182887818] [2022-02-15 03:40:46,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:46,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:40:46,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:40:46,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:40:46,544 INFO L87 Difference]: Start difference. First operand 289 states and 352 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:51,170 INFO L93 Difference]: Finished difference Result 2966 states and 3633 transitions. [2022-02-15 03:40:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:40:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 03:40:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:51,177 INFO L225 Difference]: With dead ends: 2966 [2022-02-15 03:40:51,177 INFO L226 Difference]: Without dead ends: 2832 [2022-02-15 03:40:51,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:40:51,178 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 355 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:51,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 267 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:40:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2022-02-15 03:40:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 291. [2022-02-15 03:40:51,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.2272727272727273) internal successors, (351), 286 states have internal predecessors, (351), 3 states have call successors, (3), 3 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 03:40:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 355 transitions. [2022-02-15 03:40:51,519 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 355 transitions. Word has length 93 [2022-02-15 03:40:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:51,519 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 355 transitions. [2022-02-15 03:40:51,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 355 transitions. [2022-02-15 03:40:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 03:40:51,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:51,519 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:51,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 03:40:51,520 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:51,520 INFO L85 PathProgramCache]: Analyzing trace with hash -55509950, now seen corresponding path program 10 times [2022-02-15 03:40:51,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:51,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104244257] [2022-02-15 03:40:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:51,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:51,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:51,522 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:51,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:51,692 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 03:40:51,692 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:51,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104244257] [2022-02-15 03:40:51,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [104244257] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:51,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:51,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:40:51,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71358020] [2022-02-15 03:40:51,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:51,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:40:51,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:40:51,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:40:51,694 INFO L87 Difference]: Start difference. First operand 291 states and 355 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:57,127 INFO L93 Difference]: Finished difference Result 3202 states and 3923 transitions. [2022-02-15 03:40:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:40:57,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 03:40:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:57,133 INFO L225 Difference]: With dead ends: 3202 [2022-02-15 03:40:57,133 INFO L226 Difference]: Without dead ends: 3068 [2022-02-15 03:40:57,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:40:57,134 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 371 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3381 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:57,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 296 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3381 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:40:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2022-02-15 03:40:57,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 293. [2022-02-15 03:40:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.2291666666666667) internal successors, (354), 288 states have internal predecessors, (354), 3 states have call successors, (3), 3 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 03:40:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 358 transitions. [2022-02-15 03:40:57,492 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 358 transitions. Word has length 95 [2022-02-15 03:40:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:57,492 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 358 transitions. [2022-02-15 03:40:57,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 358 transitions. [2022-02-15 03:40:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-15 03:40:57,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:57,493 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:57,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 03:40:57,493 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1235893923, now seen corresponding path program 11 times [2022-02-15 03:40:57,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:57,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546139728] [2022-02-15 03:40:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:57,494 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:57,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:57,504 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:57,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:57,679 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:57,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546139728] [2022-02-15 03:40:57,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [546139728] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:57,680 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:57,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:40:57,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896590291] [2022-02-15 03:40:57,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:57,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:40:57,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:57,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:40:57,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:40:57,680 INFO L87 Difference]: Start difference. First operand 293 states and 358 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:03,867 INFO L93 Difference]: Finished difference Result 3438 states and 4213 transitions. [2022-02-15 03:41:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:41:03,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-02-15 03:41:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:03,872 INFO L225 Difference]: With dead ends: 3438 [2022-02-15 03:41:03,872 INFO L226 Difference]: Without dead ends: 3304 [2022-02-15 03:41:03,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:41:03,873 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 415 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3684 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:03,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 315 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3684 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 03:41:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2022-02-15 03:41:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 295. [2022-02-15 03:41:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.2310344827586206) internal successors, (357), 290 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 361 transitions. [2022-02-15 03:41:04,267 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 361 transitions. Word has length 97 [2022-02-15 03:41:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:04,267 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 361 transitions. [2022-02-15 03:41:04,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 361 transitions. [2022-02-15 03:41:04,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-15 03:41:04,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:04,268 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:04,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 03:41:04,268 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:04,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:04,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1713525832, now seen corresponding path program 12 times [2022-02-15 03:41:04,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:04,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499898415] [2022-02-15 03:41:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:04,269 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:04,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:04,272 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:04,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:04,463 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 03:41:04,463 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:04,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499898415] [2022-02-15 03:41:04,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499898415] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:04,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:04,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:41:04,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100033254] [2022-02-15 03:41:04,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:04,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:41:04,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:04,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:41:04,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:41:04,465 INFO L87 Difference]: Start difference. First operand 295 states and 361 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:41:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:11,594 INFO L93 Difference]: Finished difference Result 3674 states and 4503 transitions. [2022-02-15 03:41:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 03:41:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-02-15 03:41:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:11,599 INFO L225 Difference]: With dead ends: 3674 [2022-02-15 03:41:11,599 INFO L226 Difference]: Without dead ends: 3540 [2022-02-15 03:41:11,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 03:41:11,600 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 445 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4286 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 4306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:11,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 339 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4286 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 03:41:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2022-02-15 03:41:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 297. [2022-02-15 03:41:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.2328767123287672) internal successors, (360), 292 states have internal predecessors, (360), 3 states have call successors, (3), 3 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 03:41:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 364 transitions. [2022-02-15 03:41:12,021 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 364 transitions. Word has length 99 [2022-02-15 03:41:12,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:12,021 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 364 transitions. [2022-02-15 03:41:12,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:41:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 364 transitions. [2022-02-15 03:41:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 03:41:12,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:12,022 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:12,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 03:41:12,022 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:12,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1156289709, now seen corresponding path program 13 times [2022-02-15 03:41:12,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:12,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823133150] [2022-02-15 03:41:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:12,024 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:12,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:12,026 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:12,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:12,270 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 03:41:12,270 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:12,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823133150] [2022-02-15 03:41:12,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823133150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:12,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:12,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:41:12,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682010263] [2022-02-15 03:41:12,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:12,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:41:12,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:12,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:41:12,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:41:12,271 INFO L87 Difference]: Start difference. First operand 297 states and 364 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:20,320 INFO L93 Difference]: Finished difference Result 3910 states and 4793 transitions. [2022-02-15 03:41:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 03:41:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-02-15 03:41:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:20,328 INFO L225 Difference]: With dead ends: 3910 [2022-02-15 03:41:20,328 INFO L226 Difference]: Without dead ends: 3776 [2022-02-15 03:41:20,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 03:41:20,329 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 486 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4765 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:20,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 351 Invalid, 4787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4765 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 03:41:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2022-02-15 03:41:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 299. [2022-02-15 03:41:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.2346938775510203) internal successors, (363), 294 states have internal predecessors, (363), 3 states have call successors, (3), 3 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 03:41:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 367 transitions. [2022-02-15 03:41:20,922 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 367 transitions. Word has length 101 [2022-02-15 03:41:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:20,922 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 367 transitions. [2022-02-15 03:41:20,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 367 transitions. [2022-02-15 03:41:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:41:20,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:20,923 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 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 03:41:20,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 03:41:20,924 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:20,924 INFO L85 PathProgramCache]: Analyzing trace with hash -30786810, now seen corresponding path program 1 times [2022-02-15 03:41:20,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:20,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062685209] [2022-02-15 03:41:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:20,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:20,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:20,928 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:21,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:21,700 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 03:41:21,700 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:21,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062685209] [2022-02-15 03:41:21,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062685209] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:21,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:21,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:41:21,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045944046] [2022-02-15 03:41:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:21,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:41:21,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:41:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:41:21,702 INFO L87 Difference]: Start difference. First operand 299 states and 367 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:41:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:23,383 INFO L93 Difference]: Finished difference Result 877 states and 1059 transitions. [2022-02-15 03:41:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:41:23,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 102 [2022-02-15 03:41:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:23,385 INFO L225 Difference]: With dead ends: 877 [2022-02-15 03:41:23,385 INFO L226 Difference]: Without dead ends: 778 [2022-02-15 03:41:23,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:41:23,386 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 205 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:23,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 61 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:41:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-02-15 03:41:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 382. [2022-02-15 03:41:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.2281167108753315) internal successors, (463), 377 states have internal predecessors, (463), 3 states have call successors, (3), 3 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 03:41:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 467 transitions. [2022-02-15 03:41:24,017 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 467 transitions. Word has length 102 [2022-02-15 03:41:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:24,017 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 467 transitions. [2022-02-15 03:41:24,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:41:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 467 transitions. [2022-02-15 03:41:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:41:24,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:24,018 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 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 03:41:24,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 03:41:24,018 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1765297018, now seen corresponding path program 2 times [2022-02-15 03:41:24,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:24,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174880345] [2022-02-15 03:41:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:24,019 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:24,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:24,021 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:24,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:24,632 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 03:41:24,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:24,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174880345] [2022-02-15 03:41:24,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174880345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:24,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:24,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 03:41:24,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988878759] [2022-02-15 03:41:24,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:24,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 03:41:24,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:24,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 03:41:24,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:41:24,633 INFO L87 Difference]: Start difference. First operand 382 states and 467 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:26,518 INFO L93 Difference]: Finished difference Result 722 states and 867 transitions. [2022-02-15 03:41:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 03:41:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:41:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:26,519 INFO L225 Difference]: With dead ends: 722 [2022-02-15 03:41:26,519 INFO L226 Difference]: Without dead ends: 623 [2022-02-15 03:41:26,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 03:41:26,520 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 124 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:26,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 67 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:41:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-15 03:41:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 563. [2022-02-15 03:41:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 558 states have (on average 1.2168458781362008) internal successors, (679), 558 states have internal predecessors, (679), 3 states have call successors, (3), 3 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 03:41:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 683 transitions. [2022-02-15 03:41:27,426 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 683 transitions. Word has length 102 [2022-02-15 03:41:27,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:27,426 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 683 transitions. [2022-02-15 03:41:27,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 683 transitions. [2022-02-15 03:41:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:41:27,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:27,427 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 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 03:41:27,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 03:41:27,427 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:27,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1879648578, now seen corresponding path program 3 times [2022-02-15 03:41:27,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:27,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065805575] [2022-02-15 03:41:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:27,428 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:27,430 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:28,201 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 03:41:28,201 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:28,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065805575] [2022-02-15 03:41:28,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065805575] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:28,202 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:28,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:41:28,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477787227] [2022-02-15 03:41:28,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:28,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:41:28,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:28,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:41:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:41:28,202 INFO L87 Difference]: Start difference. First operand 563 states and 683 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:30,588 INFO L93 Difference]: Finished difference Result 1195 states and 1436 transitions. [2022-02-15 03:41:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:41:30,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:41:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:30,589 INFO L225 Difference]: With dead ends: 1195 [2022-02-15 03:41:30,589 INFO L226 Difference]: Without dead ends: 1084 [2022-02-15 03:41:30,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:41:30,590 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 250 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:30,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 61 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:41:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-02-15 03:41:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 587. [2022-02-15 03:41:31,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 582 states have (on average 1.2147766323024054) internal successors, (707), 582 states have internal predecessors, (707), 3 states have call successors, (3), 3 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 03:41:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 711 transitions. [2022-02-15 03:41:31,558 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 711 transitions. Word has length 102 [2022-02-15 03:41:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:31,558 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 711 transitions. [2022-02-15 03:41:31,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:31,559 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 711 transitions. [2022-02-15 03:41:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:41:31,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:31,559 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 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 03:41:31,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 03:41:31,560 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:31,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1801342470, now seen corresponding path program 4 times [2022-02-15 03:41:31,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:31,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002536885] [2022-02-15 03:41:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:31,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:31,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:31,563 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:32,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:32,211 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 03:41:32,211 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:32,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002536885] [2022-02-15 03:41:32,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002536885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:32,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:32,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:41:32,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864186437] [2022-02-15 03:41:32,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:32,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:41:32,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:41:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:41:32,212 INFO L87 Difference]: Start difference. First operand 587 states and 711 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:34,718 INFO L93 Difference]: Finished difference Result 836 states and 989 transitions. [2022-02-15 03:41:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 03:41:34,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:41:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:34,720 INFO L225 Difference]: With dead ends: 836 [2022-02-15 03:41:34,720 INFO L226 Difference]: Without dead ends: 725 [2022-02-15 03:41:34,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=2331, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 03:41:34,721 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 126 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:34,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 90 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:41:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-02-15 03:41:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 605. [2022-02-15 03:41:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 600 states have (on average 1.2116666666666667) internal successors, (727), 600 states have internal predecessors, (727), 3 states have call successors, (3), 3 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 03:41:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 731 transitions. [2022-02-15 03:41:35,780 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 731 transitions. Word has length 102 [2022-02-15 03:41:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:35,780 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 731 transitions. [2022-02-15 03:41:35,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 731 transitions. [2022-02-15 03:41:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:41:35,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:35,781 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 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 03:41:35,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 03:41:35,781 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash -585826366, now seen corresponding path program 5 times [2022-02-15 03:41:35,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:35,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713574369] [2022-02-15 03:41:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:35,782 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:35,785 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:36,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:36,507 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 03:41:36,507 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:36,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713574369] [2022-02-15 03:41:36,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [713574369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:36,507 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:36,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:41:36,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712871284] [2022-02-15 03:41:36,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:36,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:41:36,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:36,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:41:36,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:41:36,508 INFO L87 Difference]: Start difference. First operand 605 states and 731 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:39,414 INFO L93 Difference]: Finished difference Result 884 states and 1039 transitions. [2022-02-15 03:41:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 03:41:39,415 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:41:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:39,416 INFO L225 Difference]: With dead ends: 884 [2022-02-15 03:41:39,416 INFO L226 Difference]: Without dead ends: 761 [2022-02-15 03:41:39,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 03:41:39,417 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 128 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:39,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 89 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:41:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-15 03:41:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 611. [2022-02-15 03:41:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 606 states have (on average 1.2095709570957096) internal successors, (733), 606 states have internal predecessors, (733), 3 states have call successors, (3), 3 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 03:41:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 737 transitions. [2022-02-15 03:41:40,447 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 737 transitions. Word has length 102 [2022-02-15 03:41:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:40,447 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 737 transitions. [2022-02-15 03:41:40,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 737 transitions. [2022-02-15 03:41:40,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:41:40,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:40,448 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 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 03:41:40,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 03:41:40,448 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:40,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1253701754, now seen corresponding path program 6 times [2022-02-15 03:41:40,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:40,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161566657] [2022-02-15 03:41:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:40,449 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:40,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:40,451 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:41,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:41,200 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 03:41:41,200 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:41,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161566657] [2022-02-15 03:41:41,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [161566657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:41,200 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:41,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 03:41:41,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694504237] [2022-02-15 03:41:41,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:41,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 03:41:41,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:41,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 03:41:41,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:41:41,201 INFO L87 Difference]: Start difference. First operand 611 states and 737 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:45,074 INFO L93 Difference]: Finished difference Result 1420 states and 1668 transitions. [2022-02-15 03:41:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 03:41:45,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:41:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:45,076 INFO L225 Difference]: With dead ends: 1420 [2022-02-15 03:41:45,076 INFO L226 Difference]: Without dead ends: 1103 [2022-02-15 03:41:45,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=381, Invalid=3401, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 03:41:45,078 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 134 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:45,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 118 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2340 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:41:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-02-15 03:41:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 971. [2022-02-15 03:41:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 966 states have (on average 1.1956521739130435) internal successors, (1155), 966 states have internal predecessors, (1155), 3 states have call successors, (3), 3 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 03:41:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1159 transitions. [2022-02-15 03:41:46,839 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1159 transitions. Word has length 102 [2022-02-15 03:41:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:46,839 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1159 transitions. [2022-02-15 03:41:46,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1159 transitions. [2022-02-15 03:41:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:41:46,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:46,841 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 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 03:41:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 03:41:46,841 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:46,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1687964094, now seen corresponding path program 7 times [2022-02-15 03:41:46,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:46,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647845395] [2022-02-15 03:41:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:46,843 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:46,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:46,846 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:47,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:47,397 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 03:41:47,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:47,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647845395] [2022-02-15 03:41:47,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [647845395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:47,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:47,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:41:47,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505045747] [2022-02-15 03:41:47,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:47,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:41:47,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:41:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:41:47,398 INFO L87 Difference]: Start difference. First operand 971 states and 1159 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:50,106 INFO L93 Difference]: Finished difference Result 1507 states and 1782 transitions. [2022-02-15 03:41:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:41:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:41:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:50,108 INFO L225 Difference]: With dead ends: 1507 [2022-02-15 03:41:50,108 INFO L226 Difference]: Without dead ends: 1154 [2022-02-15 03:41:50,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:41:50,109 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 58 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:50,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 95 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:41:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-02-15 03:41:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 980. [2022-02-15 03:41:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 975 states have (on average 1.2071794871794872) internal successors, (1177), 975 states have internal predecessors, (1177), 3 states have call successors, (3), 3 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 03:41:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1181 transitions. [2022-02-15 03:41:51,897 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1181 transitions. Word has length 102 [2022-02-15 03:41:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:51,897 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 1181 transitions. [2022-02-15 03:41:51,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1181 transitions. [2022-02-15 03:41:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:41:51,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:51,899 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 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 03:41:51,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 03:41:51,899 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2020197188, now seen corresponding path program 8 times [2022-02-15 03:41:51,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:51,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671128120] [2022-02-15 03:41:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:51,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:51,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:51,903 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:52,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:52,062 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 03:41:52,062 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:52,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671128120] [2022-02-15 03:41:52,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [671128120] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:52,062 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:52,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:41:52,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192035979] [2022-02-15 03:41:52,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:52,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:41:52,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:41:52,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:41:52,063 INFO L87 Difference]: Start difference. First operand 980 states and 1181 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 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 03:41:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:58,960 INFO L93 Difference]: Finished difference Result 3384 states and 4119 transitions. [2022-02-15 03:41:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:41:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 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 102 [2022-02-15 03:41:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:58,966 INFO L225 Difference]: With dead ends: 3384 [2022-02-15 03:41:58,966 INFO L226 Difference]: Without dead ends: 3378 [2022-02-15 03:41:58,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:41:58,967 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:58,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 143 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:41:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3378 states. [2022-02-15 03:42:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3378 to 2311. [2022-02-15 03:42:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2306 states have (on average 1.2111882046834346) internal successors, (2793), 2306 states have internal predecessors, (2793), 3 states have call successors, (3), 3 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 03:42:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 2797 transitions. [2022-02-15 03:42:03,624 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 2797 transitions. Word has length 102 [2022-02-15 03:42:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:03,624 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 2797 transitions. [2022-02-15 03:42:03,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 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 03:42:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 2797 transitions. [2022-02-15 03:42:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:42:03,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:03,628 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:42:03,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 03:42:03,628 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:03,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:03,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1573170234, now seen corresponding path program 9 times [2022-02-15 03:42:03,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:03,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864284101] [2022-02-15 03:42:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:03,630 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:03,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:03,632 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:04,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:04,054 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 03:42:04,054 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:04,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864284101] [2022-02-15 03:42:04,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [864284101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:04,054 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:04,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:42:04,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492021823] [2022-02-15 03:42:04,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:04,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:42:04,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:42:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:42:04,055 INFO L87 Difference]: Start difference. First operand 2311 states and 2797 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 03:42:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:09,010 INFO L93 Difference]: Finished difference Result 2971 states and 3591 transitions. [2022-02-15 03:42:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:42:09,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 102 [2022-02-15 03:42:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:09,014 INFO L225 Difference]: With dead ends: 2971 [2022-02-15 03:42:09,014 INFO L226 Difference]: Without dead ends: 2313 [2022-02-15 03:42:09,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:42:09,015 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:09,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:42:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-02-15 03:42:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2311. [2022-02-15 03:42:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2306 states have (on average 1.207285342584562) internal successors, (2784), 2306 states have internal predecessors, (2784), 3 states have call successors, (3), 3 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 03:42:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 2788 transitions. [2022-02-15 03:42:13,568 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 2788 transitions. Word has length 102 [2022-02-15 03:42:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:13,568 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 2788 transitions. [2022-02-15 03:42:13,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 03:42:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 2788 transitions. [2022-02-15 03:42:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:42:13,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:13,570 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 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 03:42:13,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 03:42:13,570 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:13,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1220399798, now seen corresponding path program 10 times [2022-02-15 03:42:13,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:13,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218346805] [2022-02-15 03:42:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:13,572 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:13,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:13,574 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:14,062 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 03:42:14,062 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:14,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218346805] [2022-02-15 03:42:14,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [218346805] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:14,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:14,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:42:14,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530021308] [2022-02-15 03:42:14,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:14,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:42:14,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:14,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:42:14,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:42:14,063 INFO L87 Difference]: Start difference. First operand 2311 states and 2788 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:17,870 INFO L93 Difference]: Finished difference Result 2688 states and 3220 transitions. [2022-02-15 03:42:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:42:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:42:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:17,872 INFO L225 Difference]: With dead ends: 2688 [2022-02-15 03:42:17,872 INFO L226 Difference]: Without dead ends: 1664 [2022-02-15 03:42:17,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:42:17,873 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:17,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 79 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:42:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-02-15 03:42:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1562. [2022-02-15 03:42:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1557 states have (on average 1.2138728323699421) internal successors, (1890), 1557 states have internal predecessors, (1890), 3 states have call successors, (3), 3 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 03:42:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 1894 transitions. [2022-02-15 03:42:20,973 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 1894 transitions. Word has length 102 [2022-02-15 03:42:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:20,973 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 1894 transitions. [2022-02-15 03:42:20,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 1894 transitions. [2022-02-15 03:42:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:42:20,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:20,975 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:42:20,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 03:42:20,975 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash -313195450, now seen corresponding path program 11 times [2022-02-15 03:42:20,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:20,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145018017] [2022-02-15 03:42:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:20,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:20,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:20,980 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:21,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:21,566 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 03:42:21,566 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:21,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145018017] [2022-02-15 03:42:21,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [145018017] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:21,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:21,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:42:21,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828258485] [2022-02-15 03:42:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:21,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:42:21,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:42:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:42:21,568 INFO L87 Difference]: Start difference. First operand 1562 states and 1894 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:29,574 INFO L93 Difference]: Finished difference Result 3822 states and 4624 transitions. [2022-02-15 03:42:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:42:29,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:42:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:29,578 INFO L225 Difference]: With dead ends: 3822 [2022-02-15 03:42:29,578 INFO L226 Difference]: Without dead ends: 3459 [2022-02-15 03:42:29,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:42:29,579 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 220 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:29,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 62 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:42:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2022-02-15 03:42:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 1535. [2022-02-15 03:42:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1530 states have (on average 1.2058823529411764) internal successors, (1845), 1530 states have internal predecessors, (1845), 3 states have call successors, (3), 3 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 03:42:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 1849 transitions. [2022-02-15 03:42:32,640 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 1849 transitions. Word has length 102 [2022-02-15 03:42:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:32,640 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 1849 transitions. [2022-02-15 03:42:32,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 1849 transitions. [2022-02-15 03:42:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:42:32,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:32,642 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:42:32,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 03:42:32,642 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:32,642 INFO L85 PathProgramCache]: Analyzing trace with hash 781431434, now seen corresponding path program 12 times [2022-02-15 03:42:32,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:32,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067237884] [2022-02-15 03:42:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:32,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:32,645 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:33,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:33,101 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 03:42:33,101 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:33,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067237884] [2022-02-15 03:42:33,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067237884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:33,101 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:33,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:42:33,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488175514] [2022-02-15 03:42:33,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:33,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:42:33,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:33,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:42:33,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:42:33,102 INFO L87 Difference]: Start difference. First operand 1535 states and 1849 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:37,254 INFO L93 Difference]: Finished difference Result 2018 states and 2405 transitions. [2022-02-15 03:42:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:42:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:42:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:37,256 INFO L225 Difference]: With dead ends: 2018 [2022-02-15 03:42:37,256 INFO L226 Difference]: Without dead ends: 1718 [2022-02-15 03:42:37,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:42:37,257 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 77 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:37,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 103 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:42:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-02-15 03:42:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1538. [2022-02-15 03:42:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1533 states have (on average 1.2054794520547945) internal successors, (1848), 1533 states have internal predecessors, (1848), 3 states have call successors, (3), 3 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 03:42:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 1852 transitions. [2022-02-15 03:42:40,530 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 1852 transitions. Word has length 102 [2022-02-15 03:42:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:40,531 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 1852 transitions. [2022-02-15 03:42:40,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 1852 transitions. [2022-02-15 03:42:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:42:40,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:40,532 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:42:40,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 03:42:40,532 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:40,532 INFO L85 PathProgramCache]: Analyzing trace with hash 855809162, now seen corresponding path program 13 times [2022-02-15 03:42:40,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:40,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712781159] [2022-02-15 03:42:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:40,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:40,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:40,535 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:41,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:41,046 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 03:42:41,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:41,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712781159] [2022-02-15 03:42:41,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1712781159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:41,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:41,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:42:41,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553452228] [2022-02-15 03:42:41,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:41,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:42:41,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:41,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:42:41,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:42:41,047 INFO L87 Difference]: Start difference. First operand 1538 states and 1852 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:50,420 INFO L93 Difference]: Finished difference Result 4557 states and 5489 transitions. [2022-02-15 03:42:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:42:50,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:42:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:50,425 INFO L225 Difference]: With dead ends: 4557 [2022-02-15 03:42:50,426 INFO L226 Difference]: Without dead ends: 4006 [2022-02-15 03:42:50,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:42:50,427 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 241 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:50,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 67 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:42:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2022-02-15 03:42:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 1987. [2022-02-15 03:42:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1982 states have (on average 1.200302724520686) internal successors, (2379), 1982 states have internal predecessors, (2379), 3 states have call successors, (3), 3 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 03:42:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2383 transitions. [2022-02-15 03:42:54,669 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2383 transitions. Word has length 102 [2022-02-15 03:42:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:54,669 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 2383 transitions. [2022-02-15 03:42:54,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2383 transitions. [2022-02-15 03:42:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:42:54,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:54,685 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:42:54,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-15 03:42:54,685 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash 127481354, now seen corresponding path program 14 times [2022-02-15 03:42:54,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:54,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559372636] [2022-02-15 03:42:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:54,686 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:54,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:54,688 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:55,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:55,619 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 03:42:55,619 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:55,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559372636] [2022-02-15 03:42:55,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [559372636] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:55,619 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:55,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:42:55,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207661591] [2022-02-15 03:42:55,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:55,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:42:55,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:42:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:42:55,620 INFO L87 Difference]: Start difference. First operand 1987 states and 2383 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:08,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:08,449 INFO L93 Difference]: Finished difference Result 6739 states and 8084 transitions. [2022-02-15 03:43:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 03:43:08,449 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:43:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:08,455 INFO L225 Difference]: With dead ends: 6739 [2022-02-15 03:43:08,456 INFO L226 Difference]: Without dead ends: 5242 [2022-02-15 03:43:08,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=472, Invalid=2284, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 03:43:08,459 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 288 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:08,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 66 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:43:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2022-02-15 03:43:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 3458. [2022-02-15 03:43:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3453 states have (on average 1.1940341731827397) internal successors, (4123), 3453 states have internal predecessors, (4123), 3 states have call successors, (3), 3 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 03:43:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 4127 transitions. [2022-02-15 03:43:15,687 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 4127 transitions. Word has length 102 [2022-02-15 03:43:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:15,688 INFO L470 AbstractCegarLoop]: Abstraction has 3458 states and 4127 transitions. [2022-02-15 03:43:15,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 4127 transitions. [2022-02-15 03:43:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:43:15,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:15,691 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:43:15,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-15 03:43:15,691 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:15,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:15,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2035279814, now seen corresponding path program 15 times [2022-02-15 03:43:15,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:15,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173371571] [2022-02-15 03:43:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:15,693 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:15,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:15,695 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:16,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:16,648 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 03:43:16,648 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:16,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173371571] [2022-02-15 03:43:16,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [173371571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:16,649 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:16,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:43:16,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092264069] [2022-02-15 03:43:16,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:16,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:43:16,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:16,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:43:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:43:16,650 INFO L87 Difference]: Start difference. First operand 3458 states and 4127 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:36,522 INFO L93 Difference]: Finished difference Result 9632 states and 11502 transitions. [2022-02-15 03:43:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 03:43:36,523 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:43:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:36,531 INFO L225 Difference]: With dead ends: 9632 [2022-02-15 03:43:36,531 INFO L226 Difference]: Without dead ends: 8006 [2022-02-15 03:43:36,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 03:43:36,535 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 523 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:36,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 72 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:43:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2022-02-15 03:43:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 4240. [2022-02-15 03:43:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4235 states have (on average 1.1988193624557262) internal successors, (5077), 4235 states have internal predecessors, (5077), 3 states have call successors, (3), 3 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 03:43:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 5081 transitions. [2022-02-15 03:43:45,477 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 5081 transitions. Word has length 102 [2022-02-15 03:43:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:45,477 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 5081 transitions. [2022-02-15 03:43:45,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 5081 transitions. [2022-02-15 03:43:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:43:45,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:45,480 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:43:45,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-15 03:43:45,480 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1367404426, now seen corresponding path program 16 times [2022-02-15 03:43:45,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:45,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816598] [2022-02-15 03:43:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:45,482 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:45,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:45,484 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:46,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:46,752 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 03:43:46,752 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:46,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816598] [2022-02-15 03:43:46,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [816598] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:46,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:46,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:43:46,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896098610] [2022-02-15 03:43:46,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:46,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:43:46,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:46,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:43:46,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:43:46,753 INFO L87 Difference]: Start difference. First operand 4240 states and 5081 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:04,890 INFO L93 Difference]: Finished difference Result 7601 states and 8980 transitions. [2022-02-15 03:44:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 03:44:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:44:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:04,898 INFO L225 Difference]: With dead ends: 7601 [2022-02-15 03:44:04,898 INFO L226 Difference]: Without dead ends: 7289 [2022-02-15 03:44:04,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 03:44:04,900 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 598 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:04,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 117 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:44:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2022-02-15 03:44:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 4240. [2022-02-15 03:44:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4235 states have (on average 1.1974025974025975) internal successors, (5071), 4235 states have internal predecessors, (5071), 3 states have call successors, (3), 3 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 03:44:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 5075 transitions. [2022-02-15 03:44:13,815 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 5075 transitions. Word has length 102 [2022-02-15 03:44:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:13,815 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 5075 transitions. [2022-02-15 03:44:13,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 5075 transitions. [2022-02-15 03:44:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:44:13,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:13,818 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:44:13,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-15 03:44:13,818 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:13,818 INFO L85 PathProgramCache]: Analyzing trace with hash 933142086, now seen corresponding path program 17 times [2022-02-15 03:44:13,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:13,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071300923] [2022-02-15 03:44:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:13,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:13,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:13,822 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:14,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:14,677 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 03:44:14,677 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:14,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071300923] [2022-02-15 03:44:14,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1071300923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:14,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:14,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:44:14,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043170036] [2022-02-15 03:44:14,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:14,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:44:14,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:44:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:44:14,678 INFO L87 Difference]: Start difference. First operand 4240 states and 5075 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 2 states have call successors, (3), 3 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 03:44:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:33,253 INFO L93 Difference]: Finished difference Result 7637 states and 8996 transitions. [2022-02-15 03:44:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 03:44:33,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:44:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:33,261 INFO L225 Difference]: With dead ends: 7637 [2022-02-15 03:44:33,261 INFO L226 Difference]: Without dead ends: 7331 [2022-02-15 03:44:33,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=2896, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 03:44:33,262 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 330 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:33,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 120 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:44:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7331 states. [2022-02-15 03:44:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7331 to 4132. [2022-02-15 03:44:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 4127 states have (on average 1.2003876908165738) internal successors, (4954), 4127 states have internal predecessors, (4954), 3 states have call successors, (3), 3 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 03:44:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 4958 transitions. [2022-02-15 03:44:41,988 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 4958 transitions. Word has length 102 [2022-02-15 03:44:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:41,988 INFO L470 AbstractCegarLoop]: Abstraction has 4132 states and 4958 transitions. [2022-02-15 03:44:41,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 2 states have call successors, (3), 3 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 03:44:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 4958 transitions. [2022-02-15 03:44:41,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:44:41,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:41,991 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 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 03:44:41,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-15 03:44:41,992 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1047935946, now seen corresponding path program 1 times [2022-02-15 03:44:41,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:41,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149813028] [2022-02-15 03:44:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:41,993 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:41,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:41,995 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:42,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:42,425 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 03:44:42,425 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:42,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149813028] [2022-02-15 03:44:42,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1149813028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:42,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:42,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:44:42,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398805210] [2022-02-15 03:44:42,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:42,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:44:42,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:42,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:44:42,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:44:42,425 INFO L87 Difference]: Start difference. First operand 4132 states and 4958 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:54,042 INFO L93 Difference]: Finished difference Result 5544 states and 6598 transitions. [2022-02-15 03:44:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:44:54,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:44:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:54,047 INFO L225 Difference]: With dead ends: 5544 [2022-02-15 03:44:54,048 INFO L226 Difference]: Without dead ends: 5073 [2022-02-15 03:44:54,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:44:54,049 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 174 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:54,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 48 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:44:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5073 states. [2022-02-15 03:45:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5073 to 4027. [2022-02-15 03:45:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4027 states, 4022 states have (on average 1.2026355047240178) internal successors, (4837), 4022 states have internal predecessors, (4837), 3 states have call successors, (3), 3 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 03:45:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 4841 transitions. [2022-02-15 03:45:02,649 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 4841 transitions. Word has length 102 [2022-02-15 03:45:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:02,649 INFO L470 AbstractCegarLoop]: Abstraction has 4027 states and 4841 transitions. [2022-02-15 03:45:02,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 4841 transitions. [2022-02-15 03:45:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:45:02,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:02,652 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:45:02,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-15 03:45:02,652 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:02,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1560036234, now seen corresponding path program 18 times [2022-02-15 03:45:02,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:02,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748587340] [2022-02-15 03:45:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:02,653 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:02,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:02,655 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:03,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:03,131 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 03:45:03,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:03,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748587340] [2022-02-15 03:45:03,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748587340] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:03,131 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:03,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:45:03,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604665688] [2022-02-15 03:45:03,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:03,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:45:03,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:45:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:45:03,135 INFO L87 Difference]: Start difference. First operand 4027 states and 4841 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 03:45:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:17,294 INFO L93 Difference]: Finished difference Result 7120 states and 8483 transitions. [2022-02-15 03:45:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:45:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 102 [2022-02-15 03:45:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:17,301 INFO L225 Difference]: With dead ends: 7120 [2022-02-15 03:45:17,301 INFO L226 Difference]: Without dead ends: 6135 [2022-02-15 03:45:17,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:45:17,302 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:17,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 51 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:45:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6135 states. [2022-02-15 03:45:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6135 to 4643. [2022-02-15 03:45:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4638 states have (on average 1.1996550237171195) internal successors, (5564), 4638 states have internal predecessors, (5564), 3 states have call successors, (3), 3 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 03:45:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 5568 transitions. [2022-02-15 03:45:27,174 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 5568 transitions. Word has length 102 [2022-02-15 03:45:27,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:27,174 INFO L470 AbstractCegarLoop]: Abstraction has 4643 states and 5568 transitions. [2022-02-15 03:45:27,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 03:45:27,174 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 5568 transitions. [2022-02-15 03:45:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:45:27,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:27,177 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:45:27,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-15 03:45:27,178 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:27,178 INFO L85 PathProgramCache]: Analyzing trace with hash 168583758, now seen corresponding path program 19 times [2022-02-15 03:45:27,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:27,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345912609] [2022-02-15 03:45:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:27,179 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:27,181 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:27,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:27,570 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 03:45:27,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:27,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345912609] [2022-02-15 03:45:27,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [345912609] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:27,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:27,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:45:27,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607640585] [2022-02-15 03:45:27,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:27,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:45:27,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:27,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:45:27,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:45:27,571 INFO L87 Difference]: Start difference. First operand 4643 states and 5568 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 03:45:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:37,655 INFO L93 Difference]: Finished difference Result 6728 states and 8058 transitions. [2022-02-15 03:45:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:45:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 102 [2022-02-15 03:45:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:37,660 INFO L225 Difference]: With dead ends: 6728 [2022-02-15 03:45:37,660 INFO L226 Difference]: Without dead ends: 4610 [2022-02-15 03:45:37,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:45:37,662 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:37,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 53 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:45:37,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2022-02-15 03:45:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2022-02-15 03:45:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4605 states have (on average 1.1943539630836049) internal successors, (5500), 4605 states have internal predecessors, (5500), 3 states have call successors, (3), 3 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 03:45:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5504 transitions. [2022-02-15 03:45:47,572 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5504 transitions. Word has length 102 [2022-02-15 03:45:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:47,572 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5504 transitions. [2022-02-15 03:45:47,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 03:45:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5504 transitions. [2022-02-15 03:45:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:45:47,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:47,576 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:45:47,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-15 03:45:47,576 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash 201885714, now seen corresponding path program 20 times [2022-02-15 03:45:47,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:47,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202555940] [2022-02-15 03:45:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:47,577 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:47,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:47,579 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:48,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:48,129 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 03:45:48,129 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:48,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202555940] [2022-02-15 03:45:48,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [202555940] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:48,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:48,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:45:48,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279763139] [2022-02-15 03:45:48,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:48,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:45:48,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:45:48,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:45:48,130 INFO L87 Difference]: Start difference. First operand 4610 states and 5504 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:59,010 INFO L93 Difference]: Finished difference Result 6855 states and 8169 transitions. [2022-02-15 03:45:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:45:59,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:45:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:59,015 INFO L225 Difference]: With dead ends: 6855 [2022-02-15 03:45:59,015 INFO L226 Difference]: Without dead ends: 4818 [2022-02-15 03:45:59,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:45:59,017 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:59,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 86 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:45:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4818 states. [2022-02-15 03:46:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4818 to 4361. [2022-02-15 03:46:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4361 states, 4356 states have (on average 1.205463728191001) internal successors, (5251), 4356 states have internal predecessors, (5251), 3 states have call successors, (3), 3 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 03:46:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4361 states to 4361 states and 5255 transitions. [2022-02-15 03:46:08,723 INFO L78 Accepts]: Start accepts. Automaton has 4361 states and 5255 transitions. Word has length 102 [2022-02-15 03:46:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:46:08,723 INFO L470 AbstractCegarLoop]: Abstraction has 4361 states and 5255 transitions. [2022-02-15 03:46:08,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4361 states and 5255 transitions. [2022-02-15 03:46:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:46:08,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:46:08,726 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:46:08,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-15 03:46:08,726 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:46:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:46:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1470626894, now seen corresponding path program 21 times [2022-02-15 03:46:08,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:46:08,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84524648] [2022-02-15 03:46:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:46:08,728 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:46:08,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:46:08,730 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:46:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:46:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:09,034 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 03:46:09,034 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:46:09,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84524648] [2022-02-15 03:46:09,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [84524648] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:46:09,035 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:46:09,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:46:09,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765574194] [2022-02-15 03:46:09,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:46:09,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:46:09,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:46:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:46:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:46:09,036 INFO L87 Difference]: Start difference. First operand 4361 states and 5255 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 03:46:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:18,776 INFO L93 Difference]: Finished difference Result 4691 states and 5648 transitions. [2022-02-15 03:46:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:46:18,777 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 102 [2022-02-15 03:46:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:18,782 INFO L225 Difference]: With dead ends: 4691 [2022-02-15 03:46:18,782 INFO L226 Difference]: Without dead ends: 4343 [2022-02-15 03:46:18,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:46:18,783 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 77 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:18,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 49 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:46:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2022-02-15 03:46:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 4343. [2022-02-15 03:46:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4338 states have (on average 1.1996311664361456) internal successors, (5204), 4338 states have internal predecessors, (5204), 3 states have call successors, (3), 3 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 03:46:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 5208 transitions. [2022-02-15 03:46:28,440 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 5208 transitions. Word has length 102 [2022-02-15 03:46:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:46:28,440 INFO L470 AbstractCegarLoop]: Abstraction has 4343 states and 5208 transitions. [2022-02-15 03:46:28,440 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 03:46:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 5208 transitions. [2022-02-15 03:46:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:46:28,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:46:28,443 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:46:28,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-15 03:46:28,443 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:46:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:46:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1428558542, now seen corresponding path program 22 times [2022-02-15 03:46:28,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:46:28,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309272567] [2022-02-15 03:46:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:46:28,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:46:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:46:28,447 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:46:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:28,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:46:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:28,824 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 03:46:28,824 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:46:28,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309272567] [2022-02-15 03:46:28,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [309272567] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:46:28,824 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:46:28,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:46:28,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719257855] [2022-02-15 03:46:28,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:46:28,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:46:28,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:46:28,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:46:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:46:28,825 INFO L87 Difference]: Start difference. First operand 4343 states and 5208 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:38,597 INFO L93 Difference]: Finished difference Result 4661 states and 5587 transitions. [2022-02-15 03:46:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:46:38,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:46:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:38,602 INFO L225 Difference]: With dead ends: 4661 [2022-02-15 03:46:38,602 INFO L226 Difference]: Without dead ends: 4337 [2022-02-15 03:46:38,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:46:38,603 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:38,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 65 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:46:38,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4337 states. [2022-02-15 03:46:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4337 to 4337. [2022-02-15 03:46:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4337 states, 4332 states have (on average 1.1985226223453371) internal successors, (5192), 4332 states have internal predecessors, (5192), 3 states have call successors, (3), 3 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 03:46:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4337 states to 4337 states and 5196 transitions. [2022-02-15 03:46:48,231 INFO L78 Accepts]: Start accepts. Automaton has 4337 states and 5196 transitions. Word has length 102 [2022-02-15 03:46:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:46:48,231 INFO L470 AbstractCegarLoop]: Abstraction has 4337 states and 5196 transitions. [2022-02-15 03:46:48,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4337 states and 5196 transitions. [2022-02-15 03:46:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:46:48,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:46:48,234 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:46:48,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-15 03:46:48,234 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:46:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:46:48,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1771781870, now seen corresponding path program 23 times [2022-02-15 03:46:48,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:46:48,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157831887] [2022-02-15 03:46:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:46:48,235 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:46:48,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:46:48,237 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:46:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:48,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:46:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:48,801 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 03:46:48,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:46:48,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157831887] [2022-02-15 03:46:48,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157831887] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:46:48,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:46:48,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:46:48,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501330519] [2022-02-15 03:46:48,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:46:48,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:46:48,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:46:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:46:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:46:48,802 INFO L87 Difference]: Start difference. First operand 4337 states and 5196 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:59,144 INFO L93 Difference]: Finished difference Result 4637 states and 5561 transitions. [2022-02-15 03:46:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:46:59,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:46:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:59,149 INFO L225 Difference]: With dead ends: 4637 [2022-02-15 03:46:59,149 INFO L226 Difference]: Without dead ends: 4361 [2022-02-15 03:46:59,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:46:59,150 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 81 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:59,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 92 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:46:59,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2022-02-15 03:47:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4229. [2022-02-15 03:47:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4229 states, 4224 states have (on average 1.2035984848484849) internal successors, (5084), 4224 states have internal predecessors, (5084), 3 states have call successors, (3), 3 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 03:47:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 5088 transitions. [2022-02-15 03:47:08,575 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 5088 transitions. Word has length 102 [2022-02-15 03:47:08,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:47:08,576 INFO L470 AbstractCegarLoop]: Abstraction has 4229 states and 5088 transitions. [2022-02-15 03:47:08,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:08,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 5088 transitions. [2022-02-15 03:47:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:47:08,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:47:08,579 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:47:08,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-15 03:47:08,579 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:47:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:47:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1071914250, now seen corresponding path program 24 times [2022-02-15 03:47:08,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:47:08,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689896559] [2022-02-15 03:47:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:47:08,580 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:47:08,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:47:08,582 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:47:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:09,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:09,231 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 03:47:09,231 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:09,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689896559] [2022-02-15 03:47:09,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689896559] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:09,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:09,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:47:09,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225933469] [2022-02-15 03:47:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:09,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:47:09,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:47:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:47:09,232 INFO L87 Difference]: Start difference. First operand 4229 states and 5088 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:47:22,521 INFO L93 Difference]: Finished difference Result 6135 states and 7362 transitions. [2022-02-15 03:47:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:47:22,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:47:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:47:22,527 INFO L225 Difference]: With dead ends: 6135 [2022-02-15 03:47:22,527 INFO L226 Difference]: Without dead ends: 5336 [2022-02-15 03:47:22,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:47:22,528 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 187 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:47:22,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 86 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:47:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2022-02-15 03:47:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 4090. [2022-02-15 03:47:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4090 states, 4085 states have (on average 1.1987760097919216) internal successors, (4897), 4085 states have internal predecessors, (4897), 3 states have call successors, (3), 3 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 03:47:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 4901 transitions. [2022-02-15 03:47:31,664 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 4901 transitions. Word has length 102 [2022-02-15 03:47:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:47:31,664 INFO L470 AbstractCegarLoop]: Abstraction has 4090 states and 4901 transitions. [2022-02-15 03:47:31,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 4901 transitions. [2022-02-15 03:47:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:47:31,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:47:31,667 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:47:31,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-15 03:47:31,667 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:47:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:47:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048434, now seen corresponding path program 25 times [2022-02-15 03:47:31,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:47:31,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077665505] [2022-02-15 03:47:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:47:31,669 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:47:31,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:47:31,671 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:47:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:32,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:32,070 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 03:47:32,070 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:32,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077665505] [2022-02-15 03:47:32,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077665505] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:32,071 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:32,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:47:32,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17497913] [2022-02-15 03:47:32,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:32,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:47:32,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:47:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:47:32,071 INFO L87 Difference]: Start difference. First operand 4090 states and 4901 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:47:41,471 INFO L93 Difference]: Finished difference Result 5895 states and 7060 transitions. [2022-02-15 03:47:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:47:41,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:47:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:47:41,475 INFO L225 Difference]: With dead ends: 5895 [2022-02-15 03:47:41,475 INFO L226 Difference]: Without dead ends: 4090 [2022-02-15 03:47:41,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:47:41,477 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 131 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:47:41,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 57 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:47:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2022-02-15 03:47:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 4090. [2022-02-15 03:47:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4090 states, 4085 states have (on average 1.1902080783353732) internal successors, (4862), 4085 states have internal predecessors, (4862), 3 states have call successors, (3), 3 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 03:47:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 4866 transitions. [2022-02-15 03:47:50,753 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 4866 transitions. Word has length 102 [2022-02-15 03:47:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:47:50,753 INFO L470 AbstractCegarLoop]: Abstraction has 4090 states and 4866 transitions. [2022-02-15 03:47:50,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 4866 transitions. [2022-02-15 03:47:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:47:50,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:47:50,757 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:47:50,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-15 03:47:50,757 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:47:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:47:50,757 INFO L85 PathProgramCache]: Analyzing trace with hash 118857926, now seen corresponding path program 26 times [2022-02-15 03:47:50,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:47:50,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986196448] [2022-02-15 03:47:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:47:50,761 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:47:50,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:47:50,763 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:47:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:51,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:51,355 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 03:47:51,355 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:51,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986196448] [2022-02-15 03:47:51,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [986196448] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:51,355 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:51,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:47:51,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172725678] [2022-02-15 03:47:51,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:51,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:47:51,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:51,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:47:51,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:47:51,356 INFO L87 Difference]: Start difference. First operand 4090 states and 4866 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:48:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:48:06,123 INFO L93 Difference]: Finished difference Result 6691 states and 7959 transitions. [2022-02-15 03:48:06,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 03:48:06,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:48:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:48:06,130 INFO L225 Difference]: With dead ends: 6691 [2022-02-15 03:48:06,130 INFO L226 Difference]: Without dead ends: 5967 [2022-02-15 03:48:06,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 03:48:06,131 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 259 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:48:06,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 67 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:48:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5967 states. [2022-02-15 03:48:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5967 to 4703. [2022-02-15 03:48:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4698 states have (on average 1.1871008939974457) internal successors, (5577), 4698 states have internal predecessors, (5577), 3 states have call successors, (3), 3 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 03:48:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 5581 transitions. [2022-02-15 03:48:16,790 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 5581 transitions. Word has length 102 [2022-02-15 03:48:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:48:16,790 INFO L470 AbstractCegarLoop]: Abstraction has 4703 states and 5581 transitions. [2022-02-15 03:48:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:48:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 5581 transitions. [2022-02-15 03:48:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:48:16,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:48:16,793 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:48:16,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-15 03:48:16,793 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:48:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:48:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash 637840838, now seen corresponding path program 27 times [2022-02-15 03:48:16,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:48:16,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258328162] [2022-02-15 03:48:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:48:16,794 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:48:16,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:48:16,796 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:48:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:17,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:48:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:17,223 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 03:48:17,224 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:48:17,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258328162] [2022-02-15 03:48:17,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258328162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:48:17,224 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:48:17,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:48:17,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892877380] [2022-02-15 03:48:17,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:48:17,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:48:17,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:48:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:48:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:48:17,224 INFO L87 Difference]: Start difference. First operand 4703 states and 5581 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 03:48:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:48:28,188 INFO L93 Difference]: Finished difference Result 6786 states and 8046 transitions. [2022-02-15 03:48:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:48:28,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 102 [2022-02-15 03:48:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:48:28,194 INFO L225 Difference]: With dead ends: 6786 [2022-02-15 03:48:28,194 INFO L226 Difference]: Without dead ends: 4719 [2022-02-15 03:48:28,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:48:28,196 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:48:28,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 62 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:48:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4719 states. [2022-02-15 03:48:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4719 to 4607. [2022-02-15 03:48:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4602 states have (on average 1.1820947414167753) internal successors, (5440), 4602 states have internal predecessors, (5440), 3 states have call successors, (3), 3 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 03:48:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 5444 transitions. [2022-02-15 03:48:38,847 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 5444 transitions. Word has length 102 [2022-02-15 03:48:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:48:38,847 INFO L470 AbstractCegarLoop]: Abstraction has 4607 states and 5444 transitions. [2022-02-15 03:48:38,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 03:48:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 5444 transitions. [2022-02-15 03:48:38,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:48:38,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:48:38,851 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:48:38,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-15 03:48:38,851 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:48:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:48:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash -32696694, now seen corresponding path program 28 times [2022-02-15 03:48:38,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:48:38,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127315173] [2022-02-15 03:48:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:48:38,853 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:48:38,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:48:38,856 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:48:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:39,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:48:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:39,525 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 03:48:39,525 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:48:39,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127315173] [2022-02-15 03:48:39,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127315173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:48:39,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:48:39,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 03:48:39,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185086964] [2022-02-15 03:48:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:48:39,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 03:48:39,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:48:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 03:48:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:48:39,526 INFO L87 Difference]: Start difference. First operand 4607 states and 5444 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:48:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:48:55,475 INFO L93 Difference]: Finished difference Result 7154 states and 8477 transitions. [2022-02-15 03:48:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 03:48:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:48:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:48:55,482 INFO L225 Difference]: With dead ends: 7154 [2022-02-15 03:48:55,482 INFO L226 Difference]: Without dead ends: 6075 [2022-02-15 03:48:55,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=1206, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 03:48:55,484 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 221 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:48:55,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 69 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:48:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6075 states. [2022-02-15 03:49:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6075 to 4948. [2022-02-15 03:49:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4943 states have (on average 1.1778272304268662) internal successors, (5822), 4943 states have internal predecessors, (5822), 3 states have call successors, (3), 3 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 03:49:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 5826 transitions. [2022-02-15 03:49:06,922 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 5826 transitions. Word has length 102 [2022-02-15 03:49:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:49:06,923 INFO L470 AbstractCegarLoop]: Abstraction has 4948 states and 5826 transitions. [2022-02-15 03:49:06,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:49:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 5826 transitions. [2022-02-15 03:49:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:49:06,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:49:06,925 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:49:06,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-15 03:49:06,926 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:49:06,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:49:06,926 INFO L85 PathProgramCache]: Analyzing trace with hash 407980110, now seen corresponding path program 29 times [2022-02-15 03:49:06,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:49:06,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319439324] [2022-02-15 03:49:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:49:06,927 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:49:06,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:49:06,929 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:49:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:07,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:49:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:07,522 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 03:49:07,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:49:07,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319439324] [2022-02-15 03:49:07,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [319439324] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:49:07,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:49:07,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:49:07,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672654376] [2022-02-15 03:49:07,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:49:07,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:49:07,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:49:07,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:49:07,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:49:07,523 INFO L87 Difference]: Start difference. First operand 4948 states and 5826 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:49:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:49:27,605 INFO L93 Difference]: Finished difference Result 9159 states and 10706 transitions. [2022-02-15 03:49:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 03:49:27,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:49:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:49:27,628 INFO L225 Difference]: With dead ends: 9159 [2022-02-15 03:49:27,629 INFO L226 Difference]: Without dead ends: 7522 [2022-02-15 03:49:27,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 03:49:27,632 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 328 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:49:27,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 90 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:49:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7522 states. [2022-02-15 03:49:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7522 to 4948. [2022-02-15 03:49:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4943 states have (on average 1.1725672668419989) internal successors, (5796), 4943 states have internal predecessors, (5796), 3 states have call successors, (3), 3 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 03:49:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 5800 transitions. [2022-02-15 03:49:39,146 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 5800 transitions. Word has length 102 [2022-02-15 03:49:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:49:39,147 INFO L470 AbstractCegarLoop]: Abstraction has 4948 states and 5800 transitions. [2022-02-15 03:49:39,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:49:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 5800 transitions. [2022-02-15 03:49:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:49:39,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:49:39,150 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:49:39,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-15 03:49:39,150 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:49:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:49:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1521162054, now seen corresponding path program 30 times [2022-02-15 03:49:39,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:49:39,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477781808] [2022-02-15 03:49:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:49:39,151 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:49:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:49:39,153 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:49:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:39,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:49:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:39,872 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 03:49:39,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:49:39,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477781808] [2022-02-15 03:49:39,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477781808] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:49:39,872 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:49:39,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:49:39,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001797635] [2022-02-15 03:49:39,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:49:39,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:49:39,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:49:39,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:49:39,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:49:39,873 INFO L87 Difference]: Start difference. First operand 4948 states and 5800 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:49:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:49:56,016 INFO L93 Difference]: Finished difference Result 7050 states and 8302 transitions. [2022-02-15 03:49:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 03:49:56,016 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:49:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:49:56,022 INFO L225 Difference]: With dead ends: 7050 [2022-02-15 03:49:56,022 INFO L226 Difference]: Without dead ends: 5953 [2022-02-15 03:49:56,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:49:56,025 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 291 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:49:56,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 70 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:49:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5953 states. [2022-02-15 03:50:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5953 to 4799. [2022-02-15 03:50:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4794 states have (on average 1.1689612015018773) internal successors, (5604), 4794 states have internal predecessors, (5604), 3 states have call successors, (3), 3 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 03:50:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 5608 transitions. [2022-02-15 03:50:07,339 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 5608 transitions. Word has length 102 [2022-02-15 03:50:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:50:07,339 INFO L470 AbstractCegarLoop]: Abstraction has 4799 states and 5608 transitions. [2022-02-15 03:50:07,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:50:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 5608 transitions. [2022-02-15 03:50:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:50:07,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:50:07,342 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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 03:50:07,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-15 03:50:07,342 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:50:07,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:50:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash -425329978, now seen corresponding path program 31 times [2022-02-15 03:50:07,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:50:07,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797599374] [2022-02-15 03:50:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:50:07,343 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:50:07,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:50:07,345 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:50:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:08,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:50:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:08,134 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 03:50:08,134 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:50:08,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797599374] [2022-02-15 03:50:08,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1797599374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:50:08,134 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:50:08,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:50:08,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534505024] [2022-02-15 03:50:08,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:50:08,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:50:08,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:50:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:50:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:50:08,135 INFO L87 Difference]: Start difference. First operand 4799 states and 5608 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:50:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:50:27,789 INFO L93 Difference]: Finished difference Result 8801 states and 10202 transitions. [2022-02-15 03:50:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 03:50:27,790 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:50:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:50:27,798 INFO L225 Difference]: With dead ends: 8801 [2022-02-15 03:50:27,798 INFO L226 Difference]: Without dead ends: 7152 [2022-02-15 03:50:27,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 03:50:27,800 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 342 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:50:27,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 84 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:50:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2022-02-15 03:50:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 4511. [2022-02-15 03:50:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 4506 states have (on average 1.1739902352418996) internal successors, (5290), 4506 states have internal predecessors, (5290), 3 states have call successors, (3), 3 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 03:50:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 5294 transitions. [2022-02-15 03:50:38,848 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 5294 transitions. Word has length 102 [2022-02-15 03:50:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:50:38,848 INFO L470 AbstractCegarLoop]: Abstraction has 4511 states and 5294 transitions. [2022-02-15 03:50:38,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:50:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 5294 transitions. [2022-02-15 03:50:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:50:38,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:50:38,850 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:50:38,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-15 03:50:38,850 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:50:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:50:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1365094726, now seen corresponding path program 32 times [2022-02-15 03:50:38,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:50:38,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507304776] [2022-02-15 03:50:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:50:38,852 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:50:38,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:50:38,854 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:50:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:39,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:50:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:39,370 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 03:50:39,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:50:39,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507304776] [2022-02-15 03:50:39,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507304776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:50:39,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:50:39,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:50:39,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541050789] [2022-02-15 03:50:39,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:50:39,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:50:39,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:50:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:50:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:50:39,371 INFO L87 Difference]: Start difference. First operand 4511 states and 5294 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:50:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:50:57,443 INFO L93 Difference]: Finished difference Result 6888 states and 8036 transitions. [2022-02-15 03:50:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 03:50:57,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:50:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:50:57,451 INFO L225 Difference]: With dead ends: 6888 [2022-02-15 03:50:57,451 INFO L226 Difference]: Without dead ends: 6564 [2022-02-15 03:50:57,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 03:50:57,453 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 163 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:50:57,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 86 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:50:57,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2022-02-15 03:51:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 4469. [2022-02-15 03:51:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4464 states have (on average 1.1724910394265233) internal successors, (5234), 4464 states have internal predecessors, (5234), 3 states have call successors, (3), 3 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 03:51:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 5238 transitions. [2022-02-15 03:51:08,406 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 5238 transitions. Word has length 102 [2022-02-15 03:51:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:08,406 INFO L470 AbstractCegarLoop]: Abstraction has 4469 states and 5238 transitions. [2022-02-15 03:51:08,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 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 03:51:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 5238 transitions. [2022-02-15 03:51:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:51:08,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:08,408 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:51:08,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-15 03:51:08,408 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1768255606, now seen corresponding path program 33 times [2022-02-15 03:51:08,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:08,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52962267] [2022-02-15 03:51:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:08,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:08,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:08,411 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:08,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:08,801 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 03:51:08,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:08,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52962267] [2022-02-15 03:51:08,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [52962267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:08,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:08,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:51:08,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144802017] [2022-02-15 03:51:08,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:08,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:51:08,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:51:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:51:08,802 INFO L87 Difference]: Start difference. First operand 4469 states and 5238 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:20,691 INFO L93 Difference]: Finished difference Result 4737 states and 5536 transitions. [2022-02-15 03:51:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:51:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:51:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:20,696 INFO L225 Difference]: With dead ends: 4737 [2022-02-15 03:51:20,696 INFO L226 Difference]: Without dead ends: 4601 [2022-02-15 03:51:20,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:51:20,697 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 72 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:20,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 90 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:51:20,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-02-15 03:51:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4388. [2022-02-15 03:51:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4383 states have (on average 1.1729409080538444) internal successors, (5141), 4383 states have internal predecessors, (5141), 3 states have call successors, (3), 3 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 03:51:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 5145 transitions. [2022-02-15 03:51:31,547 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 5145 transitions. Word has length 102 [2022-02-15 03:51:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:31,547 INFO L470 AbstractCegarLoop]: Abstraction has 4388 states and 5145 transitions. [2022-02-15 03:51:31,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 5145 transitions. [2022-02-15 03:51:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:51:31,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:31,549 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:51:31,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-15 03:51:31,549 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:31,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:31,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1323026374, now seen corresponding path program 34 times [2022-02-15 03:51:31,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:31,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876341461] [2022-02-15 03:51:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:31,551 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:31,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:31,553 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:32,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:32,133 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 03:51:32,133 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:32,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876341461] [2022-02-15 03:51:32,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876341461] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:32,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:32,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 03:51:32,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021302519] [2022-02-15 03:51:32,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:32,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 03:51:32,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:32,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 03:51:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:51:32,133 INFO L87 Difference]: Start difference. First operand 4388 states and 5145 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:46,840 INFO L93 Difference]: Finished difference Result 5676 states and 6666 transitions. [2022-02-15 03:51:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 03:51:46,841 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:51:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:46,847 INFO L225 Difference]: With dead ends: 5676 [2022-02-15 03:51:46,847 INFO L226 Difference]: Without dead ends: 5263 [2022-02-15 03:51:46,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:51:46,848 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 295 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:46,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 53 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:51:46,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2022-02-15 03:51:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 4334. [2022-02-15 03:51:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4334 states, 4329 states have (on average 1.1690921690921692) internal successors, (5061), 4329 states have internal predecessors, (5061), 3 states have call successors, (3), 3 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 03:51:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4334 states to 4334 states and 5065 transitions. [2022-02-15 03:51:57,922 INFO L78 Accepts]: Start accepts. Automaton has 4334 states and 5065 transitions. Word has length 102 [2022-02-15 03:51:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:57,922 INFO L470 AbstractCegarLoop]: Abstraction has 4334 states and 5065 transitions. [2022-02-15 03:51:57,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states and 5065 transitions. [2022-02-15 03:51:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:51:57,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:57,924 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 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 03:51:57,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-15 03:51:57,925 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:57,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:57,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2129792438, now seen corresponding path program 2 times [2022-02-15 03:51:57,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:57,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282113741] [2022-02-15 03:51:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:57,926 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:57,928 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:58,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:58,505 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 03:51:58,506 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:58,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282113741] [2022-02-15 03:51:58,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [282113741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:58,506 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:58,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:51:58,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063296346] [2022-02-15 03:51:58,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:58,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:51:58,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:58,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:51:58,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:51:58,508 INFO L87 Difference]: Start difference. First operand 4334 states and 5065 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:52:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:52:14,933 INFO L93 Difference]: Finished difference Result 6524 states and 7642 transitions. [2022-02-15 03:52:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:52:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-15 03:52:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:52:14,940 INFO L225 Difference]: With dead ends: 6524 [2022-02-15 03:52:14,940 INFO L226 Difference]: Without dead ends: 5806 [2022-02-15 03:52:14,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:52:14,941 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 188 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:52:14,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 69 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:52:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2022-02-15 03:52:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 4900. [2022-02-15 03:52:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4900 states, 4895 states have (on average 1.1658835546475996) internal successors, (5707), 4895 states have internal predecessors, (5707), 3 states have call successors, (3), 3 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 03:52:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4900 states to 4900 states and 5711 transitions. [2022-02-15 03:52:27,527 INFO L78 Accepts]: Start accepts. Automaton has 4900 states and 5711 transitions. Word has length 102 [2022-02-15 03:52:27,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:52:27,527 INFO L470 AbstractCegarLoop]: Abstraction has 4900 states and 5711 transitions. [2022-02-15 03:52:27,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:52:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4900 states and 5711 transitions. [2022-02-15 03:52:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 03:52:27,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:52:27,529 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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 03:52:27,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-15 03:52:27,529 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:52:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:52:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash -752005298, now seen corresponding path program 35 times [2022-02-15 03:52:27,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:52:27,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235153293] [2022-02-15 03:52:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:52:27,530 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:52:27,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:52:27,532 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:52:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:28,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:52:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:28,032 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 03:52:28,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:52:28,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235153293] [2022-02-15 03:52:28,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235153293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:52:28,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:52:28,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:52:28,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568437596] [2022-02-15 03:52:28,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:52:28,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:52:28,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:52:28,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:52:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:52:28,033 INFO L87 Difference]: Start difference. First operand 4900 states and 5711 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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)