/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/heapsort.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:12:15,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:12:15,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:12:15,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:12:15,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:12:15,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:12:15,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:12:15,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 03:12:15,993 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:12:15,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:12:15,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:12:15,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:12:15,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:12:15,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:12:15,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:12:15,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:12:15,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:12:15,996 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:12:15,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:12:15,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:12:15,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:12:15,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:12:15,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:12:15,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:12:15,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:12:15,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:12:15,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:12:15,998 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:12:15,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:12:16,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:12:16,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:12:16,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:12:16,235 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:12:16,240 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:12:16,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/heapsort.i [2022-02-24 03:12:16,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5e5cf8e8/91a4341170e843dd8bc9553f56413795/FLAGc85f955f4 [2022-02-24 03:12:16,694 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:12:16,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i [2022-02-24 03:12:16,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5e5cf8e8/91a4341170e843dd8bc9553f56413795/FLAGc85f955f4 [2022-02-24 03:12:17,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5e5cf8e8/91a4341170e843dd8bc9553f56413795 [2022-02-24 03:12:17,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:12:17,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:12:17,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:12:17,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:12:17,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:12:17,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc21b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17, skipping insertion in model container [2022-02-24 03:12:17,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:12:17,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:12:17,287 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-02-24 03:12:17,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:12:17,312 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:12:17,321 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-02-24 03:12:17,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:12:17,339 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:12:17,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17 WrapperNode [2022-02-24 03:12:17,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:12:17,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:12:17,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:12:17,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:12:17,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:12:17,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:12:17,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:12:17,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:12:17,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17" (1/1) ... [2022-02-24 03:12:17,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:12:17,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:12:17,413 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) [2022-02-24 03:12:17,440 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 [2022-02-24 03:12:17,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:12:17,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:12:17,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:12:17,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 03:12:17,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:12:17,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:12:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:12:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:12:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 03:12:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 03:12:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:12:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:12:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 03:12:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:12:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 03:12:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:12:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:12:17,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:12:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:12:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:12:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:12:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:12:17,537 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:12:17,541 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:12:17,698 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:12:17,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:12:17,704 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 03:12:17,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:12:17 BoogieIcfgContainer [2022-02-24 03:12:17,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:12:17,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:12:17,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:12:17,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:12:17,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:12:17" (1/3) ... [2022-02-24 03:12:17,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5558c4a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:12:17, skipping insertion in model container [2022-02-24 03:12:17,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:12:17" (2/3) ... [2022-02-24 03:12:17,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5558c4a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:12:17, skipping insertion in model container [2022-02-24 03:12:17,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:12:17" (3/3) ... [2022-02-24 03:12:17,729 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2022-02-24 03:12:17,733 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:12:17,733 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:12:17,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:12:17,778 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 [2022-02-24 03:12:17,778 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:12:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 03:12:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 03:12:17,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:17,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:17,801 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -250128701, now seen corresponding path program 1 times [2022-02-24 03:12:17,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:17,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998471978] [2022-02-24 03:12:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:17,889 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:18,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:18,097 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:18,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998471978] [2022-02-24 03:12:18,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [998471978] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:18,099 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:18,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:12:18,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128940353] [2022-02-24 03:12:18,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:18,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:12:18,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:12:18,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:12:18,134 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:18,448 INFO L93 Difference]: Finished difference Result 88 states and 148 transitions. [2022-02-24 03:12:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:12:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 03:12:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:18,458 INFO L225 Difference]: With dead ends: 88 [2022-02-24 03:12:18,458 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 03:12:18,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:12:18,464 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:18,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 63 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 03:12:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-02-24 03:12:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 03:12:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-02-24 03:12:18,507 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 15 [2022-02-24 03:12:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:18,508 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-02-24 03:12:18,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-02-24 03:12:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 03:12:18,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:18,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:18,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:12:18,509 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash -254865470, now seen corresponding path program 1 times [2022-02-24 03:12:18,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:18,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013075318] [2022-02-24 03:12:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:18,514 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:18,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:18,583 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:18,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013075318] [2022-02-24 03:12:18,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013075318] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:18,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:18,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:12:18,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276302568] [2022-02-24 03:12:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:18,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:12:18,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:12:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:12:18,586 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:18,923 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2022-02-24 03:12:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:12:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 03:12:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:18,925 INFO L225 Difference]: With dead ends: 71 [2022-02-24 03:12:18,925 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 03:12:18,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:12:18,927 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:18,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:12:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 03:12:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2022-02-24 03:12:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 03:12:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-24 03:12:18,944 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 15 [2022-02-24 03:12:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:18,945 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-24 03:12:18,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-24 03:12:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 03:12:18,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:18,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:18,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:12:18,946 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:18,947 INFO L85 PathProgramCache]: Analyzing trace with hash -216435080, now seen corresponding path program 1 times [2022-02-24 03:12:18,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:18,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843064343] [2022-02-24 03:12:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:18,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:18,950 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:18,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:19,005 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:19,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843064343] [2022-02-24 03:12:19,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1843064343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:19,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:19,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:12:19,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582716134] [2022-02-24 03:12:19,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:19,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:12:19,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:12:19,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:12:19,008 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:19,339 INFO L93 Difference]: Finished difference Result 80 states and 115 transitions. [2022-02-24 03:12:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:12:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 03:12:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:19,348 INFO L225 Difference]: With dead ends: 80 [2022-02-24 03:12:19,348 INFO L226 Difference]: Without dead ends: 78 [2022-02-24 03:12:19,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:12:19,355 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:19,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 65 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-24 03:12:19,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2022-02-24 03:12:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-24 03:12:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 98 transitions. [2022-02-24 03:12:19,384 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 98 transitions. Word has length 15 [2022-02-24 03:12:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:19,384 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 98 transitions. [2022-02-24 03:12:19,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 98 transitions. [2022-02-24 03:12:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 03:12:19,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:19,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:19,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:12:19,386 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:19,386 INFO L85 PathProgramCache]: Analyzing trace with hash -228679181, now seen corresponding path program 1 times [2022-02-24 03:12:19,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:19,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670798486] [2022-02-24 03:12:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:19,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:19,389 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:19,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:19,447 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:19,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670798486] [2022-02-24 03:12:19,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [670798486] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:19,447 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:19,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:12:19,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644558330] [2022-02-24 03:12:19,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:19,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:12:19,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:19,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:12:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:12:19,449 INFO L87 Difference]: Start difference. First operand 68 states and 98 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:19,746 INFO L93 Difference]: Finished difference Result 122 states and 183 transitions. [2022-02-24 03:12:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:12:19,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 03:12:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:19,749 INFO L225 Difference]: With dead ends: 122 [2022-02-24 03:12:19,749 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 03:12:19,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:12:19,750 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:19,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 03:12:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2022-02-24 03:12:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 38 states have call successors, (38), 7 states have call predecessors, (38), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-24 03:12:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 140 transitions. [2022-02-24 03:12:19,776 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 140 transitions. Word has length 15 [2022-02-24 03:12:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:19,776 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 140 transitions. [2022-02-24 03:12:19,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:12:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 140 transitions. [2022-02-24 03:12:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:12:19,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:19,778 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:19,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:12:19,778 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:19,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1266022048, now seen corresponding path program 1 times [2022-02-24 03:12:19,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:19,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800569606] [2022-02-24 03:12:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:19,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:19,782 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:19,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:19,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:19,875 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:19,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800569606] [2022-02-24 03:12:19,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [800569606] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:19,876 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:19,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:12:19,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761786200] [2022-02-24 03:12:19,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:19,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:12:19,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:19,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:12:19,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:12:19,877 INFO L87 Difference]: Start difference. First operand 94 states and 140 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:20,041 INFO L93 Difference]: Finished difference Result 100 states and 145 transitions. [2022-02-24 03:12:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:12:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-24 03:12:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:20,045 INFO L225 Difference]: With dead ends: 100 [2022-02-24 03:12:20,045 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 03:12:20,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:12:20,048 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:20,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:12:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 03:12:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-02-24 03:12:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 38 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-24 03:12:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 143 transitions. [2022-02-24 03:12:20,094 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 143 transitions. Word has length 20 [2022-02-24 03:12:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:20,094 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 143 transitions. [2022-02-24 03:12:20,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 143 transitions. [2022-02-24 03:12:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:12:20,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:20,097 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:20,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:12:20,098 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash 884659585, now seen corresponding path program 1 times [2022-02-24 03:12:20,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:20,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615016604] [2022-02-24 03:12:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:20,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:20,101 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:20,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:20,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:20,203 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:20,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615016604] [2022-02-24 03:12:20,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615016604] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:20,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:20,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:12:20,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535759590] [2022-02-24 03:12:20,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:20,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:12:20,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:12:20,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:12:20,205 INFO L87 Difference]: Start difference. First operand 98 states and 143 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:20,545 INFO L93 Difference]: Finished difference Result 131 states and 194 transitions. [2022-02-24 03:12:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:12:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-24 03:12:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:20,549 INFO L225 Difference]: With dead ends: 131 [2022-02-24 03:12:20,549 INFO L226 Difference]: Without dead ends: 129 [2022-02-24 03:12:20,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:12:20,552 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:20,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-24 03:12:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2022-02-24 03:12:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 65 states have (on average 1.323076923076923) internal successors, (86), 66 states have internal predecessors, (86), 52 states have call successors, (52), 9 states have call predecessors, (52), 8 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-24 03:12:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 189 transitions. [2022-02-24 03:12:20,606 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 189 transitions. Word has length 20 [2022-02-24 03:12:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:20,606 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 189 transitions. [2022-02-24 03:12:20,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 189 transitions. [2022-02-24 03:12:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:12:20,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:20,612 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:20,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:12:20,613 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1424204299, now seen corresponding path program 1 times [2022-02-24 03:12:20,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:20,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024561890] [2022-02-24 03:12:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:20,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:20,615 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:20,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:20,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:20,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:20,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024561890] [2022-02-24 03:12:20,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024561890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:20,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:20,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:12:20,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076784393] [2022-02-24 03:12:20,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:20,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:12:20,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:12:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:12:20,697 INFO L87 Difference]: Start difference. First operand 126 states and 189 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:20,971 INFO L93 Difference]: Finished difference Result 188 states and 291 transitions. [2022-02-24 03:12:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:12:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-24 03:12:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:20,975 INFO L225 Difference]: With dead ends: 188 [2022-02-24 03:12:20,975 INFO L226 Difference]: Without dead ends: 186 [2022-02-24 03:12:20,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:12:20,976 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:20,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 65 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:20,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-24 03:12:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2022-02-24 03:12:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 81 states have internal predecessors, (101), 76 states have call successors, (76), 10 states have call predecessors, (76), 9 states have return successors, (75), 70 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-24 03:12:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 252 transitions. [2022-02-24 03:12:21,011 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 252 transitions. Word has length 20 [2022-02-24 03:12:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:21,012 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 252 transitions. [2022-02-24 03:12:21,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 252 transitions. [2022-02-24 03:12:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:12:21,013 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:21,013 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:21,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:12:21,013 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:21,014 INFO L85 PathProgramCache]: Analyzing trace with hash 297853571, now seen corresponding path program 1 times [2022-02-24 03:12:21,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:21,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334046623] [2022-02-24 03:12:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:21,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:21,015 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:21,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:21,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:21,057 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:21,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334046623] [2022-02-24 03:12:21,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [334046623] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:21,057 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:21,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:12:21,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957250394] [2022-02-24 03:12:21,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:21,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:12:21,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:21,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:12:21,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:12:21,059 INFO L87 Difference]: Start difference. First operand 162 states and 252 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:21,195 INFO L93 Difference]: Finished difference Result 329 states and 524 transitions. [2022-02-24 03:12:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:12:21,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-24 03:12:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:21,198 INFO L225 Difference]: With dead ends: 329 [2022-02-24 03:12:21,198 INFO L226 Difference]: Without dead ends: 239 [2022-02-24 03:12:21,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:12:21,200 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:21,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:12:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-24 03:12:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 209. [2022-02-24 03:12:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 101 states have internal predecessors, (129), 104 states have call successors, (104), 10 states have call predecessors, (104), 9 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2022-02-24 03:12:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 336 transitions. [2022-02-24 03:12:21,246 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 336 transitions. Word has length 20 [2022-02-24 03:12:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:21,247 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 336 transitions. [2022-02-24 03:12:21,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 03:12:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 336 transitions. [2022-02-24 03:12:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:12:21,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:21,248 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:21,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:12:21,248 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash 288094237, now seen corresponding path program 1 times [2022-02-24 03:12:21,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:21,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682826368] [2022-02-24 03:12:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:21,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:21,250 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:21,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:21,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 03:12:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:21,299 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:21,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682826368] [2022-02-24 03:12:21,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [682826368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:21,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:21,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:12:21,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407825915] [2022-02-24 03:12:21,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:21,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:12:21,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:12:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:12:21,301 INFO L87 Difference]: Start difference. First operand 209 states and 336 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 03:12:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:21,631 INFO L93 Difference]: Finished difference Result 275 states and 448 transitions. [2022-02-24 03:12:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:12:21,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-02-24 03:12:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:21,636 INFO L225 Difference]: With dead ends: 275 [2022-02-24 03:12:21,636 INFO L226 Difference]: Without dead ends: 273 [2022-02-24 03:12:21,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:12:21,638 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:21,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 61 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-02-24 03:12:21,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 249. [2022-02-24 03:12:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 114 states have (on average 1.3859649122807018) internal successors, (158), 124 states have internal predecessors, (158), 124 states have call successors, (124), 11 states have call predecessors, (124), 10 states have return successors, (123), 113 states have call predecessors, (123), 123 states have call successors, (123) [2022-02-24 03:12:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 405 transitions. [2022-02-24 03:12:21,705 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 405 transitions. Word has length 27 [2022-02-24 03:12:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:21,705 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 405 transitions. [2022-02-24 03:12:21,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 03:12:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 405 transitions. [2022-02-24 03:12:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:12:21,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:21,707 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:21,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:12:21,707 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash -870562259, now seen corresponding path program 1 times [2022-02-24 03:12:21,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:21,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465335435] [2022-02-24 03:12:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:21,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:22,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:12:22,058 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:12:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:22,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:22,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:22,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 03:12:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:22,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:22,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465335435] [2022-02-24 03:12:22,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [465335435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:22,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:22,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:12:22,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604008253] [2022-02-24 03:12:22,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:22,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:12:22,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:12:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:12:22,110 INFO L87 Difference]: Start difference. First operand 249 states and 405 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 03:12:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:22,519 INFO L93 Difference]: Finished difference Result 593 states and 971 transitions. [2022-02-24 03:12:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:12:22,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-02-24 03:12:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:22,524 INFO L225 Difference]: With dead ends: 593 [2022-02-24 03:12:22,524 INFO L226 Difference]: Without dead ends: 396 [2022-02-24 03:12:22,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:12:22,526 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:22,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 53 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:12:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-02-24 03:12:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 250. [2022-02-24 03:12:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 115 states have (on average 1.373913043478261) internal successors, (158), 125 states have internal predecessors, (158), 124 states have call successors, (124), 11 states have call predecessors, (124), 10 states have return successors, (123), 113 states have call predecessors, (123), 123 states have call successors, (123) [2022-02-24 03:12:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 405 transitions. [2022-02-24 03:12:22,591 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 405 transitions. Word has length 29 [2022-02-24 03:12:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:22,592 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 405 transitions. [2022-02-24 03:12:22,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 03:12:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 405 transitions. [2022-02-24 03:12:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 03:12:22,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:22,593 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:22,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:12:22,593 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:22,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1319777776, now seen corresponding path program 1 times [2022-02-24 03:12:22,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:22,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811100805] [2022-02-24 03:12:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:22,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:22,596 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:22,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:22,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:22,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 03:12:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:22,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 03:12:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 03:12:22,650 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:22,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811100805] [2022-02-24 03:12:22,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811100805] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:22,651 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:22,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:12:22,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423483787] [2022-02-24 03:12:22,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:22,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:12:22,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:22,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:12:22,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:12:22,652 INFO L87 Difference]: Start difference. First operand 250 states and 405 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 03:12:22,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:22,972 INFO L93 Difference]: Finished difference Result 324 states and 521 transitions. [2022-02-24 03:12:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:12:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-24 03:12:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:22,976 INFO L225 Difference]: With dead ends: 324 [2022-02-24 03:12:22,976 INFO L226 Difference]: Without dead ends: 322 [2022-02-24 03:12:22,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:12:22,977 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:22,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 75 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:22,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-24 03:12:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 300. [2022-02-24 03:12:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 133 states have (on average 1.368421052631579) internal successors, (182), 149 states have internal predecessors, (182), 154 states have call successors, (154), 13 states have call predecessors, (154), 12 states have return successors, (153), 137 states have call predecessors, (153), 153 states have call successors, (153) [2022-02-24 03:12:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 489 transitions. [2022-02-24 03:12:23,052 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 489 transitions. Word has length 30 [2022-02-24 03:12:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:23,052 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 489 transitions. [2022-02-24 03:12:23,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 03:12:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 489 transitions. [2022-02-24 03:12:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:12:23,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:23,053 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:23,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:12:23,054 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:23,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1828949766, now seen corresponding path program 1 times [2022-02-24 03:12:23,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:23,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801761563] [2022-02-24 03:12:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:23,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:23,056 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 03:12:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-24 03:12:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:23,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:23,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801761563] [2022-02-24 03:12:23,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801761563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:23,114 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:23,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:12:23,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829902579] [2022-02-24 03:12:23,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:23,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:12:23,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:23,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:12:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:12:23,116 INFO L87 Difference]: Start difference. First operand 300 states and 489 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 03:12:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:23,580 INFO L93 Difference]: Finished difference Result 470 states and 788 transitions. [2022-02-24 03:12:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:12:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-02-24 03:12:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:23,585 INFO L225 Difference]: With dead ends: 470 [2022-02-24 03:12:23,598 INFO L226 Difference]: Without dead ends: 468 [2022-02-24 03:12:23,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:12:23,599 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 104 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:23,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 76 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:12:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-02-24 03:12:23,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 422. [2022-02-24 03:12:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 179 states have (on average 1.4022346368715084) internal successors, (251), 206 states have internal predecessors, (251), 229 states have call successors, (229), 14 states have call predecessors, (229), 13 states have return successors, (228), 201 states have call predecessors, (228), 228 states have call successors, (228) [2022-02-24 03:12:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 708 transitions. [2022-02-24 03:12:23,704 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 708 transitions. Word has length 32 [2022-02-24 03:12:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 708 transitions. [2022-02-24 03:12:23,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 03:12:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 708 transitions. [2022-02-24 03:12:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:12:23,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:23,707 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:23,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:12:23,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:23,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1969498376, now seen corresponding path program 1 times [2022-02-24 03:12:23,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:23,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623017876] [2022-02-24 03:12:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:23,710 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 03:12:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-24 03:12:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:23,773 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:23,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623017876] [2022-02-24 03:12:23,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [623017876] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:23,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:23,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:12:23,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645727661] [2022-02-24 03:12:23,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:23,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:12:23,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:12:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:12:23,775 INFO L87 Difference]: Start difference. First operand 422 states and 708 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 03:12:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:24,126 INFO L93 Difference]: Finished difference Result 489 states and 817 transitions. [2022-02-24 03:12:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:12:24,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-02-24 03:12:24,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:24,131 INFO L225 Difference]: With dead ends: 489 [2022-02-24 03:12:24,131 INFO L226 Difference]: Without dead ends: 487 [2022-02-24 03:12:24,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:12:24,132 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 109 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:24,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 66 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-02-24 03:12:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 429. [2022-02-24 03:12:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 182 states have (on average 1.3956043956043955) internal successors, (254), 209 states have internal predecessors, (254), 232 states have call successors, (232), 15 states have call predecessors, (232), 14 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-02-24 03:12:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 717 transitions. [2022-02-24 03:12:24,252 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 717 transitions. Word has length 32 [2022-02-24 03:12:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:24,252 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 717 transitions. [2022-02-24 03:12:24,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 03:12:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 717 transitions. [2022-02-24 03:12:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:12:24,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:24,253 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:24,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:12:24,254 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:24,254 INFO L85 PathProgramCache]: Analyzing trace with hash 154781133, now seen corresponding path program 1 times [2022-02-24 03:12:24,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:24,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205848013] [2022-02-24 03:12:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:24,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:24,256 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:12:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:24,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:24,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:24,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 03:12:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:24,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 03:12:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:24,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-24 03:12:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:24,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-24 03:12:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 03:12:24,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:24,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205848013] [2022-02-24 03:12:24,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205848013] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:24,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:24,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:12:24,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595500608] [2022-02-24 03:12:24,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:24,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:12:24,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:12:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:12:24,341 INFO L87 Difference]: Start difference. First operand 429 states and 717 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-24 03:12:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:24,751 INFO L93 Difference]: Finished difference Result 484 states and 791 transitions. [2022-02-24 03:12:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:12:24,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-02-24 03:12:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:24,756 INFO L225 Difference]: With dead ends: 484 [2022-02-24 03:12:24,756 INFO L226 Difference]: Without dead ends: 482 [2022-02-24 03:12:24,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:12:24,757 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:24,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 77 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-02-24 03:12:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 433. [2022-02-24 03:12:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 185 states have (on average 1.3891891891891892) internal successors, (257), 212 states have internal predecessors, (257), 232 states have call successors, (232), 16 states have call predecessors, (232), 15 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-02-24 03:12:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 720 transitions. [2022-02-24 03:12:24,876 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 720 transitions. Word has length 42 [2022-02-24 03:12:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:24,877 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 720 transitions. [2022-02-24 03:12:24,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-24 03:12:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 720 transitions. [2022-02-24 03:12:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:12:24,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:24,878 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2022-02-24 03:12:24,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:12:24,878 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:24,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:24,878 INFO L85 PathProgramCache]: Analyzing trace with hash -756625364, now seen corresponding path program 1 times [2022-02-24 03:12:24,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:24,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407706931] [2022-02-24 03:12:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:25,211 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:12:25,211 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:12:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:25,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:25,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 03:12:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:25,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 03:12:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:25,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 03:12:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:25,271 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:25,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407706931] [2022-02-24 03:12:25,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [407706931] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:25,271 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:25,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:12:25,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119088749] [2022-02-24 03:12:25,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:25,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:12:25,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:12:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:12:25,273 INFO L87 Difference]: Start difference. First operand 433 states and 720 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 03:12:25,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:25,558 INFO L93 Difference]: Finished difference Result 440 states and 726 transitions. [2022-02-24 03:12:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:12:25,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-02-24 03:12:25,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:25,562 INFO L225 Difference]: With dead ends: 440 [2022-02-24 03:12:25,562 INFO L226 Difference]: Without dead ends: 438 [2022-02-24 03:12:25,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:12:25,565 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:25,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 52 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:12:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-02-24 03:12:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2022-02-24 03:12:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 188 states have (on average 1.3829787234042554) internal successors, (260), 215 states have internal predecessors, (260), 232 states have call successors, (232), 17 states have call predecessors, (232), 16 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-02-24 03:12:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 723 transitions. [2022-02-24 03:12:25,690 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 723 transitions. Word has length 42 [2022-02-24 03:12:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:25,690 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 723 transitions. [2022-02-24 03:12:25,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 03:12:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 723 transitions. [2022-02-24 03:12:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 03:12:25,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:25,692 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:25,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:12:25,693 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash 202086614, now seen corresponding path program 1 times [2022-02-24 03:12:25,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:25,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100190100] [2022-02-24 03:12:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:25,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:26,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:12:26,020 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:12:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 03:12:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-24 03:12:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 03:12:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 03:12:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-24 03:12:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 03:12:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 03:12:26,082 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:26,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100190100] [2022-02-24 03:12:26,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [100190100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:26,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:26,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:12:26,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840519715] [2022-02-24 03:12:26,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:26,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:12:26,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:12:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:12:26,084 INFO L87 Difference]: Start difference. First operand 437 states and 723 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-24 03:12:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:26,455 INFO L93 Difference]: Finished difference Result 501 states and 826 transitions. [2022-02-24 03:12:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:12:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2022-02-24 03:12:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:26,459 INFO L225 Difference]: With dead ends: 501 [2022-02-24 03:12:26,460 INFO L226 Difference]: Without dead ends: 499 [2022-02-24 03:12:26,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:12:26,461 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 80 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:26,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 66 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:12:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-02-24 03:12:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 441. [2022-02-24 03:12:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 191 states have (on average 1.3769633507853403) internal successors, (263), 218 states have internal predecessors, (263), 232 states have call successors, (232), 18 states have call predecessors, (232), 17 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-02-24 03:12:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 726 transitions. [2022-02-24 03:12:26,609 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 726 transitions. Word has length 54 [2022-02-24 03:12:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:26,609 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 726 transitions. [2022-02-24 03:12:26,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-24 03:12:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 726 transitions. [2022-02-24 03:12:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 03:12:26,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:26,611 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:26,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:12:26,612 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash -667500302, now seen corresponding path program 1 times [2022-02-24 03:12:26,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:26,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989372417] [2022-02-24 03:12:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:26,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:26,740 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:12:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 03:12:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 03:12:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:27,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:27,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989372417] [2022-02-24 03:12:27,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [989372417] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:27,347 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:27,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:12:27,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655580658] [2022-02-24 03:12:27,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:27,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:12:27,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:27,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:12:27,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:12:27,349 INFO L87 Difference]: Start difference. First operand 441 states and 726 transitions. Second operand has 26 states, 23 states have (on average 1.434782608695652) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-24 03:12:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:29,962 INFO L93 Difference]: Finished difference Result 806 states and 1284 transitions. [2022-02-24 03:12:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 03:12:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.434782608695652) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 62 [2022-02-24 03:12:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:29,969 INFO L225 Difference]: With dead ends: 806 [2022-02-24 03:12:29,969 INFO L226 Difference]: Without dead ends: 804 [2022-02-24 03:12:29,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=737, Invalid=4233, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 03:12:29,972 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 151 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:29,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 203 Invalid, 3633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 2687 Invalid, 0 Unknown, 334 Unchecked, 1.5s Time] [2022-02-24 03:12:29,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-24 03:12:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 595. [2022-02-24 03:12:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 261 states have (on average 1.3754789272030652) internal successors, (359), 296 states have internal predecessors, (359), 310 states have call successors, (310), 25 states have call predecessors, (310), 23 states have return successors, (309), 273 states have call predecessors, (309), 309 states have call successors, (309) [2022-02-24 03:12:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 978 transitions. [2022-02-24 03:12:30,155 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 978 transitions. Word has length 62 [2022-02-24 03:12:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:30,156 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 978 transitions. [2022-02-24 03:12:30,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.434782608695652) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-24 03:12:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 978 transitions. [2022-02-24 03:12:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 03:12:30,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:12:30,157 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:12:30,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:12:30,158 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:12:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:12:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash 820904785, now seen corresponding path program 2 times [2022-02-24 03:12:30,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:12:30,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13440007] [2022-02-24 03:12:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:12:30,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:12:30,258 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:12:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:12:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:30,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 03:12:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:30,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 03:12:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:30,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-24 03:12:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:12:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:12:30,842 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:12:30,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13440007] [2022-02-24 03:12:30,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [13440007] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:12:30,843 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:12:30,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 03:12:30,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884919075] [2022-02-24 03:12:30,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:12:30,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 03:12:30,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:12:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 03:12:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:12:30,844 INFO L87 Difference]: Start difference. First operand 595 states and 978 transitions. Second operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-24 03:12:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:12:34,090 INFO L93 Difference]: Finished difference Result 1371 states and 2257 transitions. [2022-02-24 03:12:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 03:12:34,092 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.375) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 67 [2022-02-24 03:12:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:12:34,094 INFO L225 Difference]: With dead ends: 1371 [2022-02-24 03:12:34,094 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 03:12:34,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1094, Invalid=6046, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 03:12:34,107 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 230 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:12:34,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 174 Invalid, 3564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [930 Valid, 2338 Invalid, 0 Unknown, 296 Unchecked, 1.5s Time] [2022-02-24 03:12:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 03:12:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 03:12:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-24 03:12:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 03:12:34,109 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2022-02-24 03:12:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:12:34,109 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 03:12:34,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.375) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-24 03:12:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 03:12:34,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 03:12:34,111 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 03:12:34,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:12:34,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-24 03:12:44,615 WARN L232 SmtUtils]: Spent 10.48s on a formula simplification that was a NOOP. DAG size: 278 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-02-24 03:17:59,674 WARN L232 SmtUtils]: Spent 5.24m on a formula simplification. DAG size of input: 95 DAG size of output: 94 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)