/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:17:04,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:17:04,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:17:04,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:17:04,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:17:04,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:17:04,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:17:04,823 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 03:17:04,835 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:17:04,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:17:04,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:17:04,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:17:04,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:17:04,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:17:04,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:17:04,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:17:04,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:17:04,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:17:04,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:17:04,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:17:04,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:17:04,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:17:04,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:17:04,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:17:04,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:17:04,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:17:04,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:17:04,839 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:17:04,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:17:05,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:17:05,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:17:05,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:17:05,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:17:05,040 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:17:05,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2022-02-24 03:17:05,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905784524/3d623728809947b0966933155765f7ac/FLAG0d65da25a [2022-02-24 03:17:05,429 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:17:05,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i [2022-02-24 03:17:05,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905784524/3d623728809947b0966933155765f7ac/FLAG0d65da25a [2022-02-24 03:17:05,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905784524/3d623728809947b0966933155765f7ac [2022-02-24 03:17:05,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:17:05,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:17:05,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:17:05,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:17:05,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:17:05,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:17:05" (1/1) ... [2022-02-24 03:17:05,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77fe184d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:05, skipping insertion in model container [2022-02-24 03:17:05,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:17:05" (1/1) ... [2022-02-24 03:17:05,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:17:05,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:17:06,029 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i[895,908] [2022-02-24 03:17:06,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:17:06,048 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:17:06,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i[895,908] [2022-02-24 03:17:06,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:17:06,070 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:17:06,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06 WrapperNode [2022-02-24 03:17:06,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:17:06,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:17:06,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:17:06,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:17:06,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06" (1/1) ... [2022-02-24 03:17:06,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06" (1/1) ... [2022-02-24 03:17:06,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06" (1/1) ... [2022-02-24 03:17:06,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06" (1/1) ... [2022-02-24 03:17:06,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06" (1/1) ... [2022-02-24 03:17:06,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06" (1/1) ... [2022-02-24 03:17:06,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06" (1/1) ... [2022-02-24 03:17:06,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:17:06,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:17:06,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:17:06,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:17:06,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06" (1/1) ... [2022-02-24 03:17:06,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:17:06,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:17:06,128 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 03:17:06,151 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 03:17:06,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:17:06,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:17:06,165 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:17:06,165 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 03:17:06,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:17:06,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:17:06,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:17:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:17:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 03:17:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 03:17:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:17:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:17:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 03:17:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:17:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 03:17:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:17:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:17:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:17:06,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:17:06,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:17:06,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:17:06,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:17:06,228 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:17:06,229 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:17:06,302 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:17:06,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:17:06,305 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 03:17:06,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:17:06 BoogieIcfgContainer [2022-02-24 03:17:06,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:17:06,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:17:06,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:17:06,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:17:06,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:17:05" (1/3) ... [2022-02-24 03:17:06,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507c6cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:17:06, skipping insertion in model container [2022-02-24 03:17:06,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:17:06" (2/3) ... [2022-02-24 03:17:06,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507c6cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:17:06, skipping insertion in model container [2022-02-24 03:17:06,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:17:06" (3/3) ... [2022-02-24 03:17:06,323 INFO L111 eAbstractionObserver]: Analyzing ICFG jm2006.i [2022-02-24 03:17:06,326 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:17:06,326 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:17:06,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:17:06,386 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 03:17:06,387 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:17:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 03:17:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-24 03:17:06,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:06,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:06,406 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1244516831, now seen corresponding path program 1 times [2022-02-24 03:17:06,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:06,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279887625] [2022-02-24 03:17:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:06,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:06,454 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:17:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:06,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:06,736 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 03:17:06,738 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:06,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279887625] [2022-02-24 03:17:06,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279887625] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:06,739 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:06,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:17:06,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297087952] [2022-02-24 03:17:06,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:06,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:17:06,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:17:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:17:06,772 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:06,972 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-02-24 03:17:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:17:06,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-24 03:17:06,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:06,978 INFO L225 Difference]: With dead ends: 47 [2022-02-24 03:17:06,978 INFO L226 Difference]: Without dead ends: 15 [2022-02-24 03:17:06,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:17:06,983 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:06,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 48 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-24 03:17:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-24 03:17:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-02-24 03:17:07,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-02-24 03:17:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:07,005 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-02-24 03:17:07,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-02-24 03:17:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:17:07,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:07,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:07,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:17:07,006 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1450374075, now seen corresponding path program 1 times [2022-02-24 03:17:07,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:07,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846986220] [2022-02-24 03:17:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:09,798 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:09,939 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 03:17:09,996 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:09,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846986220] [2022-02-24 03:17:09,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [846986220] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:09,997 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:09,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:17:09,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320763318] [2022-02-24 03:17:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:09,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:17:09,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:17:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:17:09,999 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:10,193 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-02-24 03:17:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:17:10,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 03:17:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:10,195 INFO L225 Difference]: With dead ends: 22 [2022-02-24 03:17:10,195 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 03:17:10,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:17:10,196 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:10,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 03:17:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-24 03:17:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states 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 03:17:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-02-24 03:17:10,200 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2022-02-24 03:17:10,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:10,200 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-02-24 03:17:10,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-02-24 03:17:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 03:17:10,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:10,201 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:10,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:17:10,202 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash -757985953, now seen corresponding path program 2 times [2022-02-24 03:17:10,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:10,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986570911] [2022-02-24 03:17:10,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:10,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:11,215 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:11,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:11,322 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 03:17:11,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:11,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986570911] [2022-02-24 03:17:11,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [986570911] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:11,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:11,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:17:11,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811994871] [2022-02-24 03:17:11,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:11,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:17:11,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:17:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:17:11,399 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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 03:17:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:11,602 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-02-24 03:17:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:17:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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 03:17:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:11,603 INFO L225 Difference]: With dead ends: 23 [2022-02-24 03:17:11,603 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 03:17:11,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:17:11,604 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:11,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 03:17:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-24 03:17:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-02-24 03:17:11,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2022-02-24 03:17:11,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:11,608 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-02-24 03:17:11,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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 03:17:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-02-24 03:17:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 03:17:11,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:11,609 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:11,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:17:11,609 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash -497670085, now seen corresponding path program 3 times [2022-02-24 03:17:11,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:11,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457939340] [2022-02-24 03:17:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:11,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:11,750 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:11,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:11,851 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 03:17:11,964 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:11,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457939340] [2022-02-24 03:17:11,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1457939340] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:11,965 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:11,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:17:11,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531758176] [2022-02-24 03:17:11,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:11,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:17:11,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:11,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:17:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:17:11,966 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:12,228 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-02-24 03:17:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:17:12,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 03:17:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:12,229 INFO L225 Difference]: With dead ends: 24 [2022-02-24 03:17:12,229 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 03:17:12,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:17:12,230 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:12,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 47 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 03:17:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-24 03:17:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states 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 03:17:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-02-24 03:17:12,234 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-02-24 03:17:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:12,234 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-02-24 03:17:12,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:12,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-02-24 03:17:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:17:12,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:12,235 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:12,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:17:12,235 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:12,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:12,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1017812769, now seen corresponding path program 4 times [2022-02-24 03:17:12,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:12,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514642066] [2022-02-24 03:17:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:12,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:12,372 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:12,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:17:12,551 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:12,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514642066] [2022-02-24 03:17:12,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514642066] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:12,552 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:12,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:17:12,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437790131] [2022-02-24 03:17:12,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:12,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:17:12,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:17:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:17:12,553 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:12,789 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-02-24 03:17:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:17:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:17:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:12,790 INFO L225 Difference]: With dead ends: 25 [2022-02-24 03:17:12,790 INFO L226 Difference]: Without dead ends: 19 [2022-02-24 03:17:12,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:17:12,791 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:12,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-24 03:17:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-24 03:17:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-02-24 03:17:12,794 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-02-24 03:17:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:12,795 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-02-24 03:17:12,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-02-24 03:17:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 03:17:12,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:12,795 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:12,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:17:12,795 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash 37633211, now seen corresponding path program 5 times [2022-02-24 03:17:12,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:12,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147854630] [2022-02-24 03:17:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:12,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:12,945 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:13,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:13,042 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 03:17:13,150 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:13,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147854630] [2022-02-24 03:17:13,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [147854630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:13,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:13,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:17:13,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239342099] [2022-02-24 03:17:13,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:13,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:17:13,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:13,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:17:13,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:17:13,152 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states 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 03:17:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:13,433 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-02-24 03:17:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:17:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 03:17:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:13,434 INFO L225 Difference]: With dead ends: 26 [2022-02-24 03:17:13,434 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:17:13,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:17:13,435 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:13,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:13,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:17:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 03:17:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-02-24 03:17:13,438 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2022-02-24 03:17:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:13,438 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-02-24 03:17:13,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states 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 03:17:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-24 03:17:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:17:13,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:13,439 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:13,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:17:13,439 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1603279777, now seen corresponding path program 6 times [2022-02-24 03:17:13,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:13,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555206937] [2022-02-24 03:17:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:13,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:13,578 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:13,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:13,659 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 03:17:13,794 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:13,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555206937] [2022-02-24 03:17:13,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [555206937] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:13,794 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:13,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:17:13,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322083337] [2022-02-24 03:17:13,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:13,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:17:13,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:17:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:17:13,795 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:14,123 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-02-24 03:17:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:17:14,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 03:17:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:14,124 INFO L225 Difference]: With dead ends: 27 [2022-02-24 03:17:14,124 INFO L226 Difference]: Without dead ends: 21 [2022-02-24 03:17:14,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:17:14,125 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:14,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-24 03:17:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-02-24 03:17:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-02-24 03:17:14,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2022-02-24 03:17:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:14,129 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-02-24 03:17:14,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-02-24 03:17:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:17:14,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:14,130 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:14,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:17:14,130 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash -931974853, now seen corresponding path program 7 times [2022-02-24 03:17:14,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:14,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974470512] [2022-02-24 03:17:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:14,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:14,260 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:14,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:17:14,535 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:14,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974470512] [2022-02-24 03:17:14,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974470512] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:14,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:14,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:17:14,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025342832] [2022-02-24 03:17:14,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:14,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:17:14,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:14,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:17:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:17:14,536 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:14,913 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-02-24 03:17:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:17:14,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 03:17:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:14,916 INFO L225 Difference]: With dead ends: 28 [2022-02-24 03:17:14,916 INFO L226 Difference]: Without dead ends: 22 [2022-02-24 03:17:14,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:17:14,917 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:14,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-24 03:17:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-02-24 03:17:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-02-24 03:17:14,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2022-02-24 03:17:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:14,921 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-02-24 03:17:14,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-02-24 03:17:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 03:17:14,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:14,922 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:14,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:17:14,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1596358689, now seen corresponding path program 8 times [2022-02-24 03:17:14,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:14,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044999043] [2022-02-24 03:17:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:14,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:15,067 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:15,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:15,142 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 03:17:15,365 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:15,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044999043] [2022-02-24 03:17:15,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044999043] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:15,365 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:15,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:17:15,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073221843] [2022-02-24 03:17:15,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:15,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:17:15,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:15,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:17:15,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:17:15,366 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:15,788 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-02-24 03:17:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:17:15,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-24 03:17:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:15,789 INFO L225 Difference]: With dead ends: 29 [2022-02-24 03:17:15,789 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 03:17:15,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:17:15,790 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:15,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 72 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 03:17:15,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-24 03:17:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-02-24 03:17:15,794 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2022-02-24 03:17:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:15,794 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-02-24 03:17:15,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-02-24 03:17:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:17:15,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:15,795 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:15,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:17:15,795 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash -717421125, now seen corresponding path program 9 times [2022-02-24 03:17:15,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:15,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057548929] [2022-02-24 03:17:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:15,882 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:15,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:15,974 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 03:17:16,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:16,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057548929] [2022-02-24 03:17:16,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057548929] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:16,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:16,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:17:16,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248208809] [2022-02-24 03:17:16,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:16,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:17:16,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:17:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:17:16,261 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:16,754 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-02-24 03:17:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:17:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 03:17:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:16,755 INFO L225 Difference]: With dead ends: 30 [2022-02-24 03:17:16,756 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 03:17:16,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:17:16,756 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:16,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 77 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:17:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 03:17:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-24 03:17:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-02-24 03:17:16,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2022-02-24 03:17:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:16,760 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-02-24 03:17:16,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-02-24 03:17:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 03:17:16,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:16,761 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:16,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:17:16,761 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:16,761 INFO L85 PathProgramCache]: Analyzing trace with hash 759839583, now seen corresponding path program 10 times [2022-02-24 03:17:16,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:16,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925901784] [2022-02-24 03:17:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:16,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:16,883 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:16,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:16,960 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 03:17:17,279 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:17,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925901784] [2022-02-24 03:17:17,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1925901784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:17,279 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:17,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:17:17,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635215130] [2022-02-24 03:17:17,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:17,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:17:17,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:17,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:17:17,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:17:17,280 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:17,860 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-02-24 03:17:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:17:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 03:17:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:17,861 INFO L225 Difference]: With dead ends: 31 [2022-02-24 03:17:17,861 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 03:17:17,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:17:17,862 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:17,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 82 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:17:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 03:17:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-24 03:17:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-02-24 03:17:17,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2022-02-24 03:17:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:17,866 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-02-24 03:17:17,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-02-24 03:17:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 03:17:17,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:17,866 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:17,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:17:17,866 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:17,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:17,867 INFO L85 PathProgramCache]: Analyzing trace with hash -689718725, now seen corresponding path program 11 times [2022-02-24 03:17:17,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:17,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994095693] [2022-02-24 03:17:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:17,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:18,003 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:18,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:18,084 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 03:17:18,462 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:18,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994095693] [2022-02-24 03:17:18,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [994095693] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:18,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:18,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:17:18,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436182442] [2022-02-24 03:17:18,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:18,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:17:18,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:17:18,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:17:18,464 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:19,115 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-02-24 03:17:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:17:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 03:17:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:19,116 INFO L225 Difference]: With dead ends: 32 [2022-02-24 03:17:19,116 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 03:17:19,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:17:19,116 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:19,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 87 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:17:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 03:17:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 03:17:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-02-24 03:17:19,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2022-02-24 03:17:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:19,120 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-02-24 03:17:19,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-02-24 03:17:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 03:17:19,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:19,121 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:19,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:17:19,121 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1618613983, now seen corresponding path program 12 times [2022-02-24 03:17:19,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:19,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270585911] [2022-02-24 03:17:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:19,255 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:19,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:19,344 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 03:17:19,951 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:19,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270585911] [2022-02-24 03:17:19,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [270585911] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:19,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:19,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:17:19,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26542645] [2022-02-24 03:17:19,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:19,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:17:19,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:19,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:17:19,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:17:19,952 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:20,847 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-02-24 03:17:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:17:20,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 03:17:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:20,848 INFO L225 Difference]: With dead ends: 33 [2022-02-24 03:17:20,848 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 03:17:20,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:17:20,849 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:20,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 92 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:17:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 03:17:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 03:17:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-02-24 03:17:20,854 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2022-02-24 03:17:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:20,854 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-02-24 03:17:20,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-02-24 03:17:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 03:17:20,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:20,854 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:20,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:17:20,855 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash 162483899, now seen corresponding path program 13 times [2022-02-24 03:17:20,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:20,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979355763] [2022-02-24 03:17:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:20,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:20,973 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:21,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:17:21,553 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:21,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979355763] [2022-02-24 03:17:21,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [979355763] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:21,554 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:21,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:17:21,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256142475] [2022-02-24 03:17:21,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:21,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:17:21,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:17:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:17:21,555 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:22,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:22,418 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-02-24 03:17:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:17:22,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 03:17:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:22,419 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:17:22,419 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 03:17:22,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:17:22,420 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:22,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:17:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 03:17:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-24 03:17:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-02-24 03:17:22,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2022-02-24 03:17:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:22,425 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-02-24 03:17:22,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-02-24 03:17:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:17:22,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:22,426 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:22,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:17:22,426 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2027875745, now seen corresponding path program 14 times [2022-02-24 03:17:22,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:22,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40414931] [2022-02-24 03:17:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:22,518 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:22,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:17:23,196 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:23,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40414931] [2022-02-24 03:17:23,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [40414931] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:23,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:23,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:17:23,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821203991] [2022-02-24 03:17:23,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:23,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:17:23,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:23,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:17:23,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:17:23,198 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:24,160 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-02-24 03:17:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:17:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 03:17:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:24,161 INFO L225 Difference]: With dead ends: 35 [2022-02-24 03:17:24,161 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 03:17:24,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:17:24,164 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:24,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:17:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 03:17:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-24 03:17:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-02-24 03:17:24,168 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2022-02-24 03:17:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:24,169 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-02-24 03:17:24,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-02-24 03:17:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 03:17:24,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:24,169 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:24,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:17:24,170 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1209547973, now seen corresponding path program 15 times [2022-02-24 03:17:24,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:24,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541656530] [2022-02-24 03:17:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:24,308 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:24,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:24,405 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 03:17:25,067 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:25,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541656530] [2022-02-24 03:17:25,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541656530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:25,068 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:25,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:17:25,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095071422] [2022-02-24 03:17:25,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:25,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:17:25,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:17:25,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:17:25,069 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:26,132 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-02-24 03:17:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:17:26,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 03:17:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:26,133 INFO L225 Difference]: With dead ends: 36 [2022-02-24 03:17:26,133 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 03:17:26,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:17:26,134 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:26,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 107 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:17:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 03:17:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 03:17:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-02-24 03:17:26,138 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2022-02-24 03:17:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:26,139 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-02-24 03:17:26,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-02-24 03:17:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:17:26,139 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:26,139 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:26,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:17:26,139 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1611190817, now seen corresponding path program 16 times [2022-02-24 03:17:26,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:26,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768928770] [2022-02-24 03:17:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:26,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:26,269 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:26,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:26,346 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 03:17:27,050 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:27,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768928770] [2022-02-24 03:17:27,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [768928770] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:27,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:27,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:17:27,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255068150] [2022-02-24 03:17:27,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:27,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:17:27,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:17:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:17:27,051 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:28,278 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-02-24 03:17:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:17:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 03:17:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:28,279 INFO L225 Difference]: With dead ends: 37 [2022-02-24 03:17:28,279 INFO L226 Difference]: Without dead ends: 31 [2022-02-24 03:17:28,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=144, Invalid=1926, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:17:28,280 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:28,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 117 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:17:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-24 03:17:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-24 03:17:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-02-24 03:17:28,285 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2022-02-24 03:17:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:28,285 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-02-24 03:17:28,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:28,286 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-02-24 03:17:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 03:17:28,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:28,286 INFO L514 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:28,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:17:28,286 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1177217093, now seen corresponding path program 17 times [2022-02-24 03:17:28,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:28,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100982495] [2022-02-24 03:17:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:28,418 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:28,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:28,512 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 03:17:29,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:29,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100982495] [2022-02-24 03:17:29,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100982495] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:29,358 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:29,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:17:29,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239265602] [2022-02-24 03:17:29,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:29,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:17:29,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:17:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:17:29,359 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:30,680 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-02-24 03:17:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:17:30,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 03:17:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:30,681 INFO L225 Difference]: With dead ends: 38 [2022-02-24 03:17:30,681 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 03:17:30,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=150, Invalid=2106, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:17:30,682 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:30,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 117 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:17:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 03:17:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-24 03:17:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-02-24 03:17:30,687 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2022-02-24 03:17:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:30,687 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-02-24 03:17:30,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-02-24 03:17:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 03:17:30,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:30,688 INFO L514 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:30,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:17:30,688 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash -608933537, now seen corresponding path program 18 times [2022-02-24 03:17:30,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:30,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098886951] [2022-02-24 03:17:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:30,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:30,829 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:30,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:30,938 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 03:17:32,103 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:32,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098886951] [2022-02-24 03:17:32,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2098886951] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:32,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:32,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:17:32,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342447651] [2022-02-24 03:17:32,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:32,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:17:32,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:32,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:17:32,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:17:32,104 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:33,896 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-02-24 03:17:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 03:17:33,896 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 03:17:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:33,897 INFO L225 Difference]: With dead ends: 39 [2022-02-24 03:17:33,897 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 03:17:33,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=161, Invalid=2289, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:17:33,898 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:33,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 122 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:17:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 03:17:33,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-24 03:17:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-02-24 03:17:33,904 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2022-02-24 03:17:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:33,904 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-02-24 03:17:33,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-02-24 03:17:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:17:33,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:33,905 INFO L514 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:33,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:17:33,905 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:33,905 INFO L85 PathProgramCache]: Analyzing trace with hash -172012485, now seen corresponding path program 19 times [2022-02-24 03:17:33,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:33,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222637440] [2022-02-24 03:17:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:33,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:34,050 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:34,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:34,162 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 03:17:35,221 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:35,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222637440] [2022-02-24 03:17:35,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222637440] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:35,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:35,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:17:35,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698897159] [2022-02-24 03:17:35,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:35,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:17:35,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:35,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:17:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:17:35,222 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:36,863 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-02-24 03:17:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:17:36,864 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 03:17:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:36,864 INFO L225 Difference]: With dead ends: 40 [2022-02-24 03:17:36,864 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 03:17:36,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=162, Invalid=2490, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 03:17:36,865 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:36,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:17:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 03:17:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-24 03:17:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-02-24 03:17:36,872 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2022-02-24 03:17:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:36,872 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-02-24 03:17:36,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-02-24 03:17:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 03:17:36,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:36,872 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:17:36,873 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:36,873 INFO L85 PathProgramCache]: Analyzing trace with hash 487638239, now seen corresponding path program 20 times [2022-02-24 03:17:36,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:36,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558369389] [2022-02-24 03:17:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:36,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:37,022 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:37,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:17:38,325 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:38,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558369389] [2022-02-24 03:17:38,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [558369389] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:38,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:38,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 03:17:38,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102956280] [2022-02-24 03:17:38,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:38,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 03:17:38,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 03:17:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=754, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:17:38,327 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:40,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:40,160 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-02-24 03:17:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:17:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 03:17:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:40,160 INFO L225 Difference]: With dead ends: 41 [2022-02-24 03:17:40,161 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 03:17:40,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=168, Invalid=2694, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:17:40,162 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:40,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:17:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 03:17:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-24 03:17:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-02-24 03:17:40,168 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2022-02-24 03:17:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:40,168 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-02-24 03:17:40,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-02-24 03:17:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:17:40,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:40,169 INFO L514 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:40,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:17:40,169 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash -538025797, now seen corresponding path program 21 times [2022-02-24 03:17:40,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:40,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077118468] [2022-02-24 03:17:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:40,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:40,311 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:40,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:17:41,754 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:41,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077118468] [2022-02-24 03:17:41,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077118468] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:41,755 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:41,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:17:41,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426057509] [2022-02-24 03:17:41,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:41,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:17:41,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:41,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:17:41,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=810, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:17:41,756 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:43,777 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-02-24 03:17:43,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:17:43,779 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 03:17:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:43,779 INFO L225 Difference]: With dead ends: 42 [2022-02-24 03:17:43,779 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 03:17:43,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=174, Invalid=2906, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:17:43,780 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:43,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 142 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:17:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 03:17:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-24 03:17:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-02-24 03:17:43,787 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2022-02-24 03:17:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:43,787 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-02-24 03:17:43,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-02-24 03:17:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 03:17:43,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:43,788 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:43,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:17:43,788 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2026127455, now seen corresponding path program 22 times [2022-02-24 03:17:43,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:43,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044979806] [2022-02-24 03:17:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:43,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:43,942 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:44,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:44,059 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 03:17:45,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:45,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044979806] [2022-02-24 03:17:45,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044979806] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:45,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:45,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 03:17:45,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508734851] [2022-02-24 03:17:45,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:45,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 03:17:45,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:45,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 03:17:45,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=868, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:17:45,628 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:47,879 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-02-24 03:17:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 03:17:47,880 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 03:17:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:47,880 INFO L225 Difference]: With dead ends: 43 [2022-02-24 03:17:47,880 INFO L226 Difference]: Without dead ends: 37 [2022-02-24 03:17:47,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=180, Invalid=3126, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:17:47,881 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:47,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 147 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:17:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-24 03:17:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-24 03:17:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-02-24 03:17:47,888 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2022-02-24 03:17:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:47,889 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-02-24 03:17:47,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-02-24 03:17:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:17:47,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:47,889 INFO L514 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:47,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:17:47,889 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:47,890 INFO L85 PathProgramCache]: Analyzing trace with hash -89500357, now seen corresponding path program 23 times [2022-02-24 03:17:47,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:47,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378211999] [2022-02-24 03:17:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:47,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:48,041 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:48,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:48,140 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 03:17:49,880 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:49,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378211999] [2022-02-24 03:17:49,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [378211999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:49,881 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:49,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:17:49,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670042750] [2022-02-24 03:17:49,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:49,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:17:49,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:49,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:17:49,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=928, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:17:49,882 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:52,339 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-02-24 03:17:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 03:17:52,347 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 03:17:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:52,347 INFO L225 Difference]: With dead ends: 44 [2022-02-24 03:17:52,347 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 03:17:52,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=186, Invalid=3354, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:17:52,352 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:52,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 147 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:17:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 03:17:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-24 03:17:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 3 states 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 03:17:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-02-24 03:17:52,359 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2022-02-24 03:17:52,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:52,359 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-02-24 03:17:52,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-02-24 03:17:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 03:17:52,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:52,360 INFO L514 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:52,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:17:52,360 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:52,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1249453089, now seen corresponding path program 24 times [2022-02-24 03:17:52,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:52,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574166147] [2022-02-24 03:17:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:52,515 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:52,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:52,620 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 03:17:54,833 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:17:54,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574166147] [2022-02-24 03:17:54,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [574166147] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:17:54,833 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:17:54,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 03:17:54,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080078936] [2022-02-24 03:17:54,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:17:54,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 03:17:54,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:17:54,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 03:17:54,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=988, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:17:54,835 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:17:57,856 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-02-24 03:17:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 03:17:57,856 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-24 03:17:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:17:57,856 INFO L225 Difference]: With dead ends: 45 [2022-02-24 03:17:57,856 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 03:17:57,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=197, Invalid=3585, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:17:57,858 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:17:57,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 157 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:17:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 03:17:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-24 03:17:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-02-24 03:17:57,866 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2022-02-24 03:17:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:17:57,866 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-02-24 03:17:57,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:17:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-02-24 03:17:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 03:17:57,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:17:57,867 INFO L514 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:17:57,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:17:57,868 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:17:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:17:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1446717883, now seen corresponding path program 25 times [2022-02-24 03:17:57,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:17:57,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310446428] [2022-02-24 03:17:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:17:57,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:17:57,978 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:17:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:58,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:17:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:17:58,082 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 03:18:00,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:18:00,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310446428] [2022-02-24 03:18:00,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310446428] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:18:00,144 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:18:00,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:18:00,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909274420] [2022-02-24 03:18:00,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:18:00,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:18:00,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:18:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:18:00,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1054, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:18:00,145 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:18:03,098 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-02-24 03:18:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:18:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 03:18:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:18:03,099 INFO L225 Difference]: With dead ends: 46 [2022-02-24 03:18:03,099 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 03:18:03,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=198, Invalid=3834, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:18:03,100 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:18:03,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 157 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:18:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 03:18:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-24 03:18:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-02-24 03:18:03,108 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2022-02-24 03:18:03,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:18:03,109 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-02-24 03:18:03,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-02-24 03:18:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 03:18:03,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:18:03,109 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:18:03,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:18:03,109 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:18:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:18:03,109 INFO L85 PathProgramCache]: Analyzing trace with hash -871327905, now seen corresponding path program 26 times [2022-02-24 03:18:03,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:18:03,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484053239] [2022-02-24 03:18:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:18:03,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:18:03,285 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:18:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:03,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:18:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:18:06,082 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:18:06,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484053239] [2022-02-24 03:18:06,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484053239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:18:06,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:18:06,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 03:18:06,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720427353] [2022-02-24 03:18:06,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:18:06,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 03:18:06,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:18:06,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 03:18:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1118, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:18:06,084 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:18:09,718 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-02-24 03:18:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 03:18:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 03:18:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:18:09,718 INFO L225 Difference]: With dead ends: 47 [2022-02-24 03:18:09,718 INFO L226 Difference]: Without dead ends: 41 [2022-02-24 03:18:09,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=209, Invalid=4081, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:18:09,720 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:18:09,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 167 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:18:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-24 03:18:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-24 03:18:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-02-24 03:18:09,728 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2022-02-24 03:18:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:18:09,729 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-02-24 03:18:09,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-02-24 03:18:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 03:18:09,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:18:09,729 INFO L514 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:18:09,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:18:09,729 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:18:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:18:09,730 INFO L85 PathProgramCache]: Analyzing trace with hash 283696699, now seen corresponding path program 27 times [2022-02-24 03:18:09,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:18:09,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442076099] [2022-02-24 03:18:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:18:09,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:18:09,899 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:18:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:10,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:18:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:10,012 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 03:18:12,621 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:18:12,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442076099] [2022-02-24 03:18:12,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1442076099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:18:12,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:18:12,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 03:18:12,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087768145] [2022-02-24 03:18:12,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:18:12,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 03:18:12,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:18:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 03:18:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1188, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:18:12,622 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:18:16,141 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-02-24 03:18:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 03:18:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 03:18:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:18:16,142 INFO L225 Difference]: With dead ends: 48 [2022-02-24 03:18:16,142 INFO L226 Difference]: Without dead ends: 42 [2022-02-24 03:18:16,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=210, Invalid=4346, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 03:18:16,143 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:18:16,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 167 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:18:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-24 03:18:16,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-24 03:18:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-02-24 03:18:16,153 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2022-02-24 03:18:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:18:16,153 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-02-24 03:18:16,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-02-24 03:18:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:18:16,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:18:16,154 INFO L514 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:18:16,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:18:16,154 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:18:16,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:18:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1729721055, now seen corresponding path program 28 times [2022-02-24 03:18:16,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:18:16,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314237304] [2022-02-24 03:18:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:18:16,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:18:16,311 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:18:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:16,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:18:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:16,428 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 03:18:19,294 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:18:19,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314237304] [2022-02-24 03:18:19,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314237304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:18:19,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:18:19,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 03:18:19,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956568439] [2022-02-24 03:18:19,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:18:19,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 03:18:19,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:18:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 03:18:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1258, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:18:19,295 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:18:23,121 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-02-24 03:18:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 03:18:23,122 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 03:18:23,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:18:23,122 INFO L225 Difference]: With dead ends: 49 [2022-02-24 03:18:23,122 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 03:18:23,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=216, Invalid=4614, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:18:23,123 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:18:23,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 172 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:18:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 03:18:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-24 03:18:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-02-24 03:18:23,132 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2022-02-24 03:18:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:18:23,132 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-02-24 03:18:23,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-02-24 03:18:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:18:23,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:18:23,133 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:18:23,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:18:23,133 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:18:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:18:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash -688164165, now seen corresponding path program 29 times [2022-02-24 03:18:23,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:18:23,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38178436] [2022-02-24 03:18:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:18:23,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:18:23,300 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:18:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:23,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:18:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:23,401 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 03:18:26,483 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:18:26,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38178436] [2022-02-24 03:18:26,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [38178436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:18:26,483 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:18:26,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 03:18:26,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083006105] [2022-02-24 03:18:26,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:18:26,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 03:18:26,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:18:26,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 03:18:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1330, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:18:26,484 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:18:30,644 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-02-24 03:18:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 03:18:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 03:18:30,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:18:30,645 INFO L225 Difference]: With dead ends: 50 [2022-02-24 03:18:30,645 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 03:18:30,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=222, Invalid=4890, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:18:30,646 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:18:30,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 182 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:18:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 03:18:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-24 03:18:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states 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 03:18:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-02-24 03:18:30,656 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2022-02-24 03:18:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:18:30,656 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-02-24 03:18:30,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-02-24 03:18:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 03:18:30,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:18:30,657 INFO L514 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:18:30,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:18:30,657 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:18:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:18:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1666805343, now seen corresponding path program 30 times [2022-02-24 03:18:30,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:18:30,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476970456] [2022-02-24 03:18:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:18:30,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:18:30,766 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:18:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:30,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:18:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:30,877 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 03:18:34,285 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:18:34,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476970456] [2022-02-24 03:18:34,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476970456] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:18:34,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:18:34,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 03:18:34,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76995373] [2022-02-24 03:18:34,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:18:34,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 03:18:34,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:18:34,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 03:18:34,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1404, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:18:34,286 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:18:38,879 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-02-24 03:18:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 03:18:38,879 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-24 03:18:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:18:38,880 INFO L225 Difference]: With dead ends: 51 [2022-02-24 03:18:38,880 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 03:18:38,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=228, Invalid=5174, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:18:38,881 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:18:38,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 187 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:18:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 03:18:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-24 03:18:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-02-24 03:18:38,895 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2022-02-24 03:18:38,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:18:38,895 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-02-24 03:18:38,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-02-24 03:18:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:18:38,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:18:38,896 INFO L514 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:18:38,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:18:38,896 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:18:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:18:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1656416059, now seen corresponding path program 31 times [2022-02-24 03:18:38,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:18:38,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975026923] [2022-02-24 03:18:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:18:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:18:39,088 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:18:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:39,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:18:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:18:43,129 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:18:43,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975026923] [2022-02-24 03:18:43,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [975026923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:18:43,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:18:43,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:18:43,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510487734] [2022-02-24 03:18:43,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:18:43,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:18:43,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:18:43,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:18:43,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1480, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:18:43,130 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:18:48,116 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-02-24 03:18:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:18:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 03:18:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:18:48,117 INFO L225 Difference]: With dead ends: 52 [2022-02-24 03:18:48,117 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 03:18:48,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=234, Invalid=5466, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 03:18:48,117 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:18:48,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 192 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:18:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 03:18:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-24 03:18:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-02-24 03:18:48,130 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2022-02-24 03:18:48,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:18:48,130 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-02-24 03:18:48,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-02-24 03:18:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 03:18:48,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:18:48,131 INFO L514 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:18:48,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:18:48,131 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:18:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:18:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1334348255, now seen corresponding path program 32 times [2022-02-24 03:18:48,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:18:48,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311367569] [2022-02-24 03:18:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:18:48,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:18:48,319 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:18:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:48,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:18:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:48,434 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 03:18:52,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:18:52,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311367569] [2022-02-24 03:18:52,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [311367569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:18:52,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:18:52,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 03:18:52,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233157804] [2022-02-24 03:18:52,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:18:52,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 03:18:52,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:18:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 03:18:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1558, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:18:52,640 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:18:57,994 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-02-24 03:18:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 03:18:57,994 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-24 03:18:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:18:57,997 INFO L225 Difference]: With dead ends: 53 [2022-02-24 03:18:57,998 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 03:18:57,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=240, Invalid=5766, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:18:57,998 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:18:57,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 197 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:18:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 03:18:58,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-24 03:18:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-02-24 03:18:58,009 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2022-02-24 03:18:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:18:58,009 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-02-24 03:18:58,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:18:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-02-24 03:18:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 03:18:58,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:18:58,009 INFO L514 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:18:58,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:18:58,010 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:18:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:18:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash -59819077, now seen corresponding path program 33 times [2022-02-24 03:18:58,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:18:58,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133202550] [2022-02-24 03:18:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:18:58,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:18:58,194 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:18:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:58,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:18:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:18:58,322 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 03:19:02,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:19:02,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133202550] [2022-02-24 03:19:02,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133202550] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:19:02,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:19:02,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 03:19:02,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072141661] [2022-02-24 03:19:02,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:19:02,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 03:19:02,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:19:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 03:19:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1638, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:19:02,982 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:19:08,858 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-02-24 03:19:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 03:19:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 03:19:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:19:08,859 INFO L225 Difference]: With dead ends: 54 [2022-02-24 03:19:08,859 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 03:19:08,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=246, Invalid=6074, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 03:19:08,860 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:19:08,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 202 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:19:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 03:19:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-24 03:19:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-02-24 03:19:08,870 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2022-02-24 03:19:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:19:08,870 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-02-24 03:19:08,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-02-24 03:19:08,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 03:19:08,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:19:08,871 INFO L514 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:19:08,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:19:08,871 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:19:08,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:19:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash -329333409, now seen corresponding path program 34 times [2022-02-24 03:19:08,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:19:08,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626876847] [2022-02-24 03:19:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:19:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:19:09,061 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:19:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:19:09,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:19:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:19:09,204 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 03:19:14,606 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:19:14,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626876847] [2022-02-24 03:19:14,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [626876847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:19:14,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:19:14,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 03:19:14,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303040723] [2022-02-24 03:19:14,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:19:14,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 03:19:14,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:19:14,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 03:19:14,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1718, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:19:14,608 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:19:21,538 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-02-24 03:19:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 03:19:21,538 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 03:19:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:19:21,539 INFO L225 Difference]: With dead ends: 55 [2022-02-24 03:19:21,539 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 03:19:21,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=257, Invalid=6385, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:19:21,540 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:19:21,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 202 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:19:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 03:19:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-24 03:19:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-02-24 03:19:21,552 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2022-02-24 03:19:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:19:21,552 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-02-24 03:19:21,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-02-24 03:19:21,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 03:19:21,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:19:21,553 INFO L514 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:19:21,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:19:21,553 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:19:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:19:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash -94343109, now seen corresponding path program 35 times [2022-02-24 03:19:21,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:19:21,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627287352] [2022-02-24 03:19:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:19:21,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:19:21,681 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:19:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:19:21,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:19:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:19:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:19:27,390 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:19:27,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627287352] [2022-02-24 03:19:27,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627287352] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:19:27,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:19:27,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 03:19:27,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303155361] [2022-02-24 03:19:27,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:19:27,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 03:19:27,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:19:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 03:19:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1804, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:19:27,392 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:19:34,135 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-02-24 03:19:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 03:19:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 03:19:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:19:34,136 INFO L225 Difference]: With dead ends: 56 [2022-02-24 03:19:34,136 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 03:19:34,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=258, Invalid=6714, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 03:19:34,136 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:19:34,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 207 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:19:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 03:19:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-24 03:19:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states 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 03:19:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-02-24 03:19:34,149 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2022-02-24 03:19:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:19:34,149 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-02-24 03:19:34,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-02-24 03:19:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 03:19:34,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:19:34,150 INFO L514 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:19:34,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:19:34,150 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:19:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:19:34,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1399578401, now seen corresponding path program 36 times [2022-02-24 03:19:34,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:19:34,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086609425] [2022-02-24 03:19:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:19:34,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:19:34,273 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:19:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:19:34,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:19:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:19:34,429 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 03:19:40,630 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:19:40,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086609425] [2022-02-24 03:19:40,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086609425] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:19:40,631 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:19:40,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-24 03:19:40,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255690257] [2022-02-24 03:19:40,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:19:40,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-24 03:19:40,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:19:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-24 03:19:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1890, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:19:40,632 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:19:48,050 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-02-24 03:19:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 03:19:48,050 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-02-24 03:19:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:19:48,051 INFO L225 Difference]: With dead ends: 57 [2022-02-24 03:19:48,051 INFO L226 Difference]: Without dead ends: 51 [2022-02-24 03:19:48,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=264, Invalid=7046, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 03:19:48,052 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:19:48,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 217 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:19:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-24 03:19:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-24 03:19:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-02-24 03:19:48,065 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2022-02-24 03:19:48,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:19:48,065 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-02-24 03:19:48,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:19:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-02-24 03:19:48,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 03:19:48,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:19:48,066 INFO L514 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:19:48,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:19:48,066 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:19:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:19:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1087800507, now seen corresponding path program 37 times [2022-02-24 03:19:48,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:19:48,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458227995] [2022-02-24 03:19:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:19:48,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:19:48,293 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:19:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:19:48,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:19:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:19:48,427 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 03:19:55,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:19:55,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458227995] [2022-02-24 03:19:55,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1458227995] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:19:55,347 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:19:55,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 03:19:55,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6526637] [2022-02-24 03:19:55,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:19:55,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 03:19:55,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:19:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 03:19:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1978, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:19:55,348 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:20:03,297 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-02-24 03:20:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 03:20:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 03:20:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:20:03,299 INFO L225 Difference]: With dead ends: 58 [2022-02-24 03:20:03,299 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 03:20:03,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=270, Invalid=7386, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 03:20:03,300 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:20:03,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 222 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:20:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 03:20:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-02-24 03:20:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-02-24 03:20:03,314 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2022-02-24 03:20:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:20:03,314 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-02-24 03:20:03,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-02-24 03:20:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 03:20:03,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:20:03,314 INFO L514 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:20:03,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:20:03,315 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:20:03,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:20:03,315 INFO L85 PathProgramCache]: Analyzing trace with hash 887135327, now seen corresponding path program 38 times [2022-02-24 03:20:03,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:20:03,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927917740] [2022-02-24 03:20:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:20:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:20:03,569 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:20:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:20:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:20:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:20:03,747 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 03:20:11,140 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:20:11,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927917740] [2022-02-24 03:20:11,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927917740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:20:11,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:20:11,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-24 03:20:11,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110738390] [2022-02-24 03:20:11,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:20:11,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-24 03:20:11,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:20:11,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-24 03:20:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 03:20:11,141 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:20:19,492 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-02-24 03:20:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 03:20:19,493 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 03:20:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:20:19,493 INFO L225 Difference]: With dead ends: 59 [2022-02-24 03:20:19,493 INFO L226 Difference]: Without dead ends: 53 [2022-02-24 03:20:19,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=276, Invalid=7734, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:20:19,494 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:20:19,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 227 Invalid, 2067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:20:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-24 03:20:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-24 03:20:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-02-24 03:20:19,512 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2022-02-24 03:20:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:20:19,512 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-02-24 03:20:19,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-02-24 03:20:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 03:20:19,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:20:19,512 INFO L514 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:20:19,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:20:19,513 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:20:19,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:20:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1038517957, now seen corresponding path program 39 times [2022-02-24 03:20:19,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:20:19,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531939977] [2022-02-24 03:20:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:20:19,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:20:19,734 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:20:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:20:19,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:20:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:20:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:20:27,354 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:20:27,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531939977] [2022-02-24 03:20:27,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [531939977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:20:27,354 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:20:27,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 03:20:27,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874411006] [2022-02-24 03:20:27,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:20:27,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 03:20:27,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:20:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 03:20:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2160, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:20:27,355 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:36,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:20:36,236 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-02-24 03:20:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 03:20:36,237 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 03:20:36,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:20:36,237 INFO L225 Difference]: With dead ends: 60 [2022-02-24 03:20:36,237 INFO L226 Difference]: Without dead ends: 54 [2022-02-24 03:20:36,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=282, Invalid=8090, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 03:20:36,238 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:20:36,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 227 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 03:20:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-24 03:20:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-24 03:20:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-02-24 03:20:36,252 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2022-02-24 03:20:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:20:36,253 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-02-24 03:20:36,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-02-24 03:20:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 03:20:36,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:20:36,253 INFO L514 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:20:36,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:20:36,254 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:20:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:20:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash -604227617, now seen corresponding path program 40 times [2022-02-24 03:20:36,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:20:36,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777629444] [2022-02-24 03:20:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:20:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:20:36,397 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:20:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:20:36,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:20:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:20:36,556 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 03:20:45,231 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:20:45,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777629444] [2022-02-24 03:20:45,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [777629444] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:20:45,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:20:45,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 03:20:45,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123039270] [2022-02-24 03:20:45,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:20:45,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 03:20:45,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:20:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 03:20:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2252, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 03:20:45,232 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:20:55,775 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-02-24 03:20:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 03:20:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-24 03:20:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:20:55,776 INFO L225 Difference]: With dead ends: 61 [2022-02-24 03:20:55,776 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 03:20:55,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=293, Invalid=8449, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 03:20:55,777 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:20:55,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 232 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 03:20:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 03:20:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-24 03:20:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-02-24 03:20:55,793 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2022-02-24 03:20:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:20:55,794 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-02-24 03:20:55,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:20:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-02-24 03:20:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 03:20:55,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:20:55,794 INFO L514 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:20:55,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:20:55,794 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:20:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:20:55,795 INFO L85 PathProgramCache]: Analyzing trace with hash -26128965, now seen corresponding path program 41 times [2022-02-24 03:20:55,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:20:55,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062645709] [2022-02-24 03:20:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:20:55,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:20:55,942 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:20:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:20:56,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:20:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:20:56,091 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 03:21:05,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:21:05,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062645709] [2022-02-24 03:21:05,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1062645709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:21:05,614 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:21:05,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 03:21:05,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546732655] [2022-02-24 03:21:05,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:21:05,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 03:21:05,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:21:05,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 03:21:05,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2348, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:21:05,615 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:21:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:21:16,915 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-02-24 03:21:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 03:21:16,916 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 03:21:16,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:21:16,916 INFO L225 Difference]: With dead ends: 62 [2022-02-24 03:21:16,916 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 03:21:16,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=299, Invalid=8821, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 03:21:16,917 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:21:16,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 242 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:21:16,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 03:21:16,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-24 03:21:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:21:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-02-24 03:21:16,934 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2022-02-24 03:21:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:21:16,934 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-02-24 03:21:16,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:21:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-02-24 03:21:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 03:21:16,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:21:16,935 INFO L514 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:21:16,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:21:16,935 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:21:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:21:16,935 INFO L85 PathProgramCache]: Analyzing trace with hash 715060063, now seen corresponding path program 42 times [2022-02-24 03:21:16,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:21:16,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155558029] [2022-02-24 03:21:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:21:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:21:17,240 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:21:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:21:17,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:21:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:21:17,411 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 03:21:27,399 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:21:27,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155558029] [2022-02-24 03:21:27,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155558029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:21:27,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:21:27,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 03:21:27,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317311218] [2022-02-24 03:21:27,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:21:27,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 03:21:27,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:21:27,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 03:21:27,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2448, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:21:27,400 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:21:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:21:38,396 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-02-24 03:21:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 03:21:38,396 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 03:21:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:21:38,397 INFO L225 Difference]: With dead ends: 63 [2022-02-24 03:21:38,397 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 03:21:38,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=300, Invalid=9206, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 03:21:38,398 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 2401 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:21:38,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 247 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2401 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 03:21:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 03:21:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-24 03:21:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:21:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-02-24 03:21:38,415 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2022-02-24 03:21:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:21:38,416 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-02-24 03:21:38,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:21:38,416 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-02-24 03:21:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 03:21:38,416 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:21:38,416 INFO L514 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:21:38,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:21:38,416 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:21:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:21:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2077883845, now seen corresponding path program 43 times [2022-02-24 03:21:38,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:21:38,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570402642] [2022-02-24 03:21:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:21:38,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:21:38,675 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:21:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:21:38,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:21:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:21:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:21:50,037 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:21:50,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570402642] [2022-02-24 03:21:50,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570402642] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:21:50,037 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:21:50,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 03:21:50,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783348170] [2022-02-24 03:21:50,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:21:50,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 03:21:50,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:21:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 03:21:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 03:21:50,038 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:22:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:22:02,942 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-02-24 03:22:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 03:22:02,943 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 03:22:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:22:02,943 INFO L225 Difference]: With dead ends: 64 [2022-02-24 03:22:02,943 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 03:22:02,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=311, Invalid=9589, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 03:22:02,944 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:22:02,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 247 Invalid, 2496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-24 03:22:02,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 03:22:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-02-24 03:22:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:22:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-02-24 03:22:02,962 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2022-02-24 03:22:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:22:02,962 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-02-24 03:22:02,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:22:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-02-24 03:22:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 03:22:02,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:22:02,963 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:22:02,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:22:02,963 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:22:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:22:02,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1535168223, now seen corresponding path program 44 times [2022-02-24 03:22:02,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:22:02,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617547127] [2022-02-24 03:22:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:22:02,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:22:03,249 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:22:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:22:03,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:22:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:22:03,412 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 03:22:15,482 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:22:15,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617547127] [2022-02-24 03:22:15,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617547127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:22:15,483 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:22:15,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-24 03:22:15,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240459870] [2022-02-24 03:22:15,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:22:15,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-24 03:22:15,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:22:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-24 03:22:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2648, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 03:22:15,484 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (3), 3 states 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 03:22:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:22:29,164 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-02-24 03:22:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 03:22:29,165 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-24 03:22:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:22:29,165 INFO L225 Difference]: With dead ends: 65 [2022-02-24 03:22:29,165 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 03:22:29,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=317, Invalid=9985, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 03:22:29,166 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:22:29,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 252 Invalid, 2598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 03:22:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 03:22:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-24 03:22:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states 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 03:22:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-02-24 03:22:29,189 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2022-02-24 03:22:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:22:29,189 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-02-24 03:22:29,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (3), 3 states 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 03:22:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-02-24 03:22:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 03:22:29,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:22:29,190 INFO L514 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:22:29,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:22:29,190 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:22:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:22:29,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1870632635, now seen corresponding path program 45 times [2022-02-24 03:22:29,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:22:29,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367989154] [2022-02-24 03:22:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:22:29,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:22:29,345 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:22:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:22:29,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:22:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:22:29,513 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 03:22:42,753 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:22:42,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367989154] [2022-02-24 03:22:42,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367989154] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:22:42,753 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:22:42,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 03:22:42,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142209836] [2022-02-24 03:22:42,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:22:42,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 03:22:42,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:22:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 03:22:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2754, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:22:42,754 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:22:56,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:22:56,479 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-02-24 03:22:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 03:22:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 03:22:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:22:56,485 INFO L225 Difference]: With dead ends: 66 [2022-02-24 03:22:56,485 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 03:22:56,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=318, Invalid=10394, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 03:22:56,486 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:22:56,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 262 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-24 03:22:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 03:22:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-24 03:22:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:22:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-02-24 03:22:56,505 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2022-02-24 03:22:56,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:22:56,506 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-02-24 03:22:56,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:22:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-02-24 03:22:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 03:22:56,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:22:56,506 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:22:56,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:22:56,506 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:22:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:22:56,506 INFO L85 PathProgramCache]: Analyzing trace with hash -614872481, now seen corresponding path program 46 times [2022-02-24 03:22:56,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:22:56,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974096395] [2022-02-24 03:22:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:22:56,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:22:56,661 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:22:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:22:56,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:22:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:22:56,859 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 03:23:11,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:23:11,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974096395] [2022-02-24 03:23:11,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [974096395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:23:11,548 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:23:11,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 03:23:11,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403668087] [2022-02-24 03:23:11,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:23:11,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 03:23:11,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:23:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 03:23:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:23:11,549 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:23:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:23:26,561 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-02-24 03:23:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 03:23:26,563 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 03:23:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:23:26,563 INFO L225 Difference]: With dead ends: 67 [2022-02-24 03:23:26,563 INFO L226 Difference]: Without dead ends: 61 [2022-02-24 03:23:26,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=324, Invalid=10806, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 03:23:26,566 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 2809 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:23:26,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 267 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2809 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 03:23:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-24 03:23:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-24 03:23:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:23:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-02-24 03:23:26,587 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2022-02-24 03:23:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:23:26,587 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-02-24 03:23:26,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:23:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-02-24 03:23:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 03:23:26,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:23:26,588 INFO L514 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:23:26,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:23:26,588 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:23:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:23:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash -356119749, now seen corresponding path program 47 times [2022-02-24 03:23:26,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:23:26,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827896161] [2022-02-24 03:23:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:23:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:23:26,755 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:23:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:23:26,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:23:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:23:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:23:42,687 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:23:42,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827896161] [2022-02-24 03:23:42,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [827896161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:23:42,688 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:23:42,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-24 03:23:42,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635070423] [2022-02-24 03:23:42,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:23:42,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-24 03:23:42,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:23:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-24 03:23:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2968, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:23:42,689 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:23:58,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:23:58,623 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-02-24 03:23:58,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 03:23:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 03:23:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:23:58,624 INFO L225 Difference]: With dead ends: 68 [2022-02-24 03:23:58,624 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 03:23:58,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=330, Invalid=11226, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 03:23:58,625 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 2916 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:23:58,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 272 Invalid, 2967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2916 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-24 03:23:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 03:23:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-24 03:23:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:23:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-02-24 03:23:58,648 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2022-02-24 03:23:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:23:58,648 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-02-24 03:23:58,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:23:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-02-24 03:23:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 03:23:58,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:23:58,648 INFO L514 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:23:58,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:23:58,649 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:23:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:23:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash -924719649, now seen corresponding path program 48 times [2022-02-24 03:23:58,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:23:58,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956222369] [2022-02-24 03:23:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:23:58,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:23:59,108 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:23:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:23:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:23:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:23:59,323 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 03:24:16,013 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:24:16,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956222369] [2022-02-24 03:24:16,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956222369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:24:16,013 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:24:16,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 03:24:16,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126738963] [2022-02-24 03:24:16,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:24:16,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 03:24:16,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:24:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 03:24:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3076, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:24:16,014 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:24:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:24:34,850 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-02-24 03:24:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 03:24:34,850 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 03:24:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:24:34,850 INFO L225 Difference]: With dead ends: 69 [2022-02-24 03:24:34,851 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 03:24:34,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=341, Invalid=11649, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 03:24:34,851 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:24:34,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 272 Invalid, 3022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-24 03:24:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 03:24:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-24 03:24:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:24:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-02-24 03:24:34,873 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2022-02-24 03:24:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:24:34,873 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-02-24 03:24:34,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:24:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-02-24 03:24:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 03:24:34,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:24:34,874 INFO L514 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:24:34,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 03:24:34,874 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:24:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:24:34,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1371447365, now seen corresponding path program 49 times [2022-02-24 03:24:34,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:24:34,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264474372] [2022-02-24 03:24:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:24:34,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:24:35,359 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:24:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:24:35,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:24:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:24:35,564 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 03:24:53,669 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:24:53,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264474372] [2022-02-24 03:24:53,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [264474372] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:24:53,670 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:24:53,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 03:24:53,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774545298] [2022-02-24 03:24:53,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:24:53,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 03:24:53,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:24:53,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 03:24:53,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:24:53,671 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:25:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:25:13,113 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-02-24 03:25:13,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 03:25:13,115 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 03:25:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:25:13,115 INFO L225 Difference]: With dead ends: 70 [2022-02-24 03:25:13,116 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 03:25:13,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=347, Invalid=12085, Unknown=0, NotChecked=0, Total=12432 [2022-02-24 03:25:13,116 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:25:13,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 282 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3136 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-02-24 03:25:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 03:25:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-24 03:25:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:25:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-02-24 03:25:13,139 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2022-02-24 03:25:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:25:13,139 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-02-24 03:25:13,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:25:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-02-24 03:25:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 03:25:13,139 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:25:13,139 INFO L514 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:25:13,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 03:25:13,139 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:25:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:25:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1959862623, now seen corresponding path program 50 times [2022-02-24 03:25:13,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:25:13,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576146836] [2022-02-24 03:25:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:25:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:25:13,633 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:25:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:25:13,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:25:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:25:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:25:34,300 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:25:34,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576146836] [2022-02-24 03:25:34,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [576146836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:25:34,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:25:34,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-24 03:25:34,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626278532] [2022-02-24 03:25:34,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:25:34,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-24 03:25:34,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:25:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-24 03:25:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3304, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 03:25:34,301 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:25:54,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:25:54,787 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-02-24 03:25:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 03:25:54,788 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 03:25:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:25:54,788 INFO L225 Difference]: With dead ends: 71 [2022-02-24 03:25:54,788 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 03:25:54,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=348, Invalid=12534, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 03:25:54,789 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 3249 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 3303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:25:54,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 287 Invalid, 3303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3249 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 03:25:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 03:25:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-02-24 03:25:54,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states 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 03:25:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-02-24 03:25:54,812 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2022-02-24 03:25:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:25:54,812 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-02-24 03:25:54,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:25:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-02-24 03:25:54,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 03:25:54,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:25:54,813 INFO L514 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:25:54,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 03:25:54,813 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:25:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:25:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2143710149, now seen corresponding path program 51 times [2022-02-24 03:25:54,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:25:54,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150292146] [2022-02-24 03:25:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:25:54,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:25:55,135 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:25:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:25:55,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:25:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:25:55,434 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 03:26:17,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:26:17,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150292146] [2022-02-24 03:26:17,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [150292146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:26:17,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:26:17,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 03:26:17,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223471465] [2022-02-24 03:26:17,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:26:17,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 03:26:17,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:26:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 03:26:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3420, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:26:17,054 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:26:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:26:39,299 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-02-24 03:26:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 03:26:39,301 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 03:26:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:26:39,302 INFO L225 Difference]: With dead ends: 72 [2022-02-24 03:26:39,302 INFO L226 Difference]: Without dead ends: 66 [2022-02-24 03:26:39,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=354, Invalid=12986, Unknown=0, NotChecked=0, Total=13340 [2022-02-24 03:26:39,303 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 3305 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 3360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:26:39,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 287 Invalid, 3360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3305 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-24 03:26:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-24 03:26:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-02-24 03:26:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:26:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-02-24 03:26:39,326 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2022-02-24 03:26:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:26:39,327 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-02-24 03:26:39,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:26:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-02-24 03:26:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 03:26:39,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:26:39,327 INFO L514 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:26:39,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 03:26:39,327 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:26:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:26:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash -505447201, now seen corresponding path program 52 times [2022-02-24 03:26:39,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:26:39,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041648098] [2022-02-24 03:26:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:26:39,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:26:39,755 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:26:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:26:40,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:26:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:26:40,249 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 03:27:10,662 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:27:10,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041648098] [2022-02-24 03:27:10,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1041648098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:27:10,662 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:27:10,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 03:27:10,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076951370] [2022-02-24 03:27:10,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:27:10,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 03:27:10,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:27:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 03:27:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3538, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 03:27:10,663 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:27:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:27:39,002 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-02-24 03:27:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 03:27:39,003 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-24 03:27:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:27:39,004 INFO L225 Difference]: With dead ends: 73 [2022-02-24 03:27:39,004 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 03:27:39,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=360, Invalid=13446, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 03:27:39,005 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 3481 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 3537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:27:39,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 297 Invalid, 3537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3481 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-02-24 03:27:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 03:27:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-24 03:27:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:27:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-02-24 03:27:39,028 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2022-02-24 03:27:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:27:39,029 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-02-24 03:27:39,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:27:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-02-24 03:27:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 03:27:39,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:27:39,029 INFO L514 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:27:39,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 03:27:39,029 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:27:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:27:39,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1258903365, now seen corresponding path program 53 times [2022-02-24 03:27:39,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:27:39,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481177382] [2022-02-24 03:27:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:27:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:27:39,791 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:27:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:27:40,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:27:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:27:40,148 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 03:28:06,431 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:28:06,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481177382] [2022-02-24 03:28:06,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481177382] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:28:06,431 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:28:06,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 03:28:06,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584122421] [2022-02-24 03:28:06,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:28:06,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 03:28:06,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:28:06,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 03:28:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3658, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:28:06,432 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:28:32,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:28:32,716 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-02-24 03:28:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 03:28:32,716 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 03:28:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:28:32,717 INFO L225 Difference]: With dead ends: 74 [2022-02-24 03:28:32,717 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 03:28:32,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=366, Invalid=13914, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 03:28:32,718 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 3539 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 3596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:28:32,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 297 Invalid, 3596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3539 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-24 03:28:32,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 03:28:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-02-24 03:28:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 3 states have call successors, (3), 3 states 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 03:28:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-02-24 03:28:32,742 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2022-02-24 03:28:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:28:32,742 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-02-24 03:28:32,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:28:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-02-24 03:28:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 03:28:32,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:28:32,743 INFO L514 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:28:32,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 03:28:32,743 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:28:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:28:32,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1153759327, now seen corresponding path program 54 times [2022-02-24 03:28:32,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:28:32,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22750018] [2022-02-24 03:28:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:28:32,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:28:33,033 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:28:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:28:33,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:28:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:28:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:29:05,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:05,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22750018] [2022-02-24 03:29:05,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [22750018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:05,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:05,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-24 03:29:05,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666455237] [2022-02-24 03:29:05,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:05,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-24 03:29:05,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-24 03:29:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3780, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:29:05,895 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:39,624 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-02-24 03:29:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 03:29:39,625 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-02-24 03:29:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:39,625 INFO L225 Difference]: With dead ends: 75 [2022-02-24 03:29:39,625 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 03:29:39,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 60.3s TimeCoverageRelationStatistics Valid=372, Invalid=14390, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 03:29:39,626 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 3659 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:39,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 302 Invalid, 3717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3659 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-02-24 03:29:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 03:29:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-02-24 03:29:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-02-24 03:29:39,654 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2022-02-24 03:29:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:39,655 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-02-24 03:29:39,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-02-24 03:29:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 03:29:39,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:39,655 INFO L514 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:39,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 03:29:39,655 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:39,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1363108549, now seen corresponding path program 55 times [2022-02-24 03:29:39,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:39,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200074242] [2022-02-24 03:29:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:39,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:40,604 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:41,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:41,078 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 03:30:14,875 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:30:14,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200074242] [2022-02-24 03:30:14,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200074242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:30:14,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:30:14,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 03:30:14,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710947205] [2022-02-24 03:30:14,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:30:14,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 03:30:14,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:30:14,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 03:30:14,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=3904, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:30:14,876 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:30:49,852 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-02-24 03:30:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 03:30:49,852 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 03:30:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:30:49,853 INFO L225 Difference]: With dead ends: 76 [2022-02-24 03:30:49,853 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 03:30:49,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=378, Invalid=14874, Unknown=0, NotChecked=0, Total=15252 [2022-02-24 03:30:49,854 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 3844 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 3903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:30:49,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 312 Invalid, 3903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3844 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-02-24 03:30:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 03:30:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-24 03:30:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-02-24 03:30:49,881 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2022-02-24 03:30:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:30:49,881 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-02-24 03:30:49,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-02-24 03:30:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 03:30:49,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:30:49,882 INFO L514 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:30:49,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 03:30:49,882 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:30:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:30:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2076601377, now seen corresponding path program 56 times [2022-02-24 03:30:49,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:30:49,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454604713] [2022-02-24 03:30:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:30:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:30:50,780 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:51,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:30:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.