/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:58:53,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:58:53,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:58:53,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:58:53,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:58:53,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:58:53,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:58:53,783 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:58:53,794 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:58:53,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:58:53,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:58:53,795 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:58:53,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:58:53,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:58:53,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:58:53,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:58:53,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:58:53,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:58:53,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:58:53,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:58:53,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:58:53,796 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:58:53,796 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:58:53,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:58:53,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:58:53,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:58:53,976 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:58:53,977 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:58:53,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-02-15 01:58:54,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cfd94f4f/ac8870b6b5014047a8211c8ebd242811/FLAG426c71406 [2022-02-15 01:58:54,349 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:58:54,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-02-15 01:58:54,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cfd94f4f/ac8870b6b5014047a8211c8ebd242811/FLAG426c71406 [2022-02-15 01:58:54,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cfd94f4f/ac8870b6b5014047a8211c8ebd242811 [2022-02-15 01:58:54,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:58:54,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:58:54,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:58:54,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:58:54,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:58:54,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e114c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54, skipping insertion in model container [2022-02-15 01:58:54,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:58:54,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:58:54,502 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c[319,332] [2022-02-15 01:58:54,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:58:54,522 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:58:54,538 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c[319,332] [2022-02-15 01:58:54,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:58:54,552 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:58:54,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54 WrapperNode [2022-02-15 01:58:54,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:58:54,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:58:54,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:58:54,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:58:54,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:58:54,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:58:54,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:58:54,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:58:54,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54" (1/1) ... [2022-02-15 01:58:54,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:58:54,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:58:54,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:58:54,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:58:54,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:58:54,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:58:54,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:58:54,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:58:54,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:58:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:58:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:58:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:58:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:58:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:58:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:58:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:58:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:58:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:58:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:58:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:58:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:58:54,666 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:58:54,667 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:58:54,738 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:58:54,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:58:54,741 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 01:58:54,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:58:54 BoogieIcfgContainer [2022-02-15 01:58:54,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:58:54,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:58:54,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:58:54,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:58:54,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:58:54" (1/3) ... [2022-02-15 01:58:54,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df40559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:58:54, skipping insertion in model container [2022-02-15 01:58:54,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:58:54" (2/3) ... [2022-02-15 01:58:54,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df40559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:58:54, skipping insertion in model container [2022-02-15 01:58:54,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:58:54" (3/3) ... [2022-02-15 01:58:54,747 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2022-02-15 01:58:54,750 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:58:54,750 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:58:54,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:58:54,789 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=JORDAN [2022-02-15 01:58:54,789 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:58:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:58:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 01:58:54,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:54,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:54,802 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-02-15 01:58:54,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:54,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621240373] [2022-02-15 01:58:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:54,847 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:54,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:54,959 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:54,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621240373] [2022-02-15 01:58:54,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [621240373] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:54,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:54,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:58:54,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359068760] [2022-02-15 01:58:54,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:54,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:58:54,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:54,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:58:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:58:54,994 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:55,046 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-15 01:58:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:58:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 01:58:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:55,052 INFO L225 Difference]: With dead ends: 34 [2022-02-15 01:58:55,053 INFO L226 Difference]: Without dead ends: 14 [2022-02-15 01:58:55,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:58:55,057 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:55,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:58:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-15 01:58:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-15 01:58:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2022-02-15 01:58:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-02-15 01:58:55,081 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-02-15 01:58:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:55,081 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-02-15 01:58:55,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-02-15 01:58:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 01:58:55,082 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:55,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:55,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:58:55,083 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-02-15 01:58:55,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:55,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208231697] [2022-02-15 01:58:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:55,086 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:55,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:55,135 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:55,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208231697] [2022-02-15 01:58:55,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [208231697] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:55,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:55,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:58:55,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754007953] [2022-02-15 01:58:55,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:55,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:58:55,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:55,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:58:55,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:58:55,138 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:55,164 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-02-15 01:58:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:58:55,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 01:58:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:55,165 INFO L225 Difference]: With dead ends: 24 [2022-02-15 01:58:55,165 INFO L226 Difference]: Without dead ends: 16 [2022-02-15 01:58:55,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:58:55,167 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:55,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:58:55,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-15 01:58:55,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-15 01:58:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2022-02-15 01:58:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-15 01:58:55,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-02-15 01:58:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:55,172 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-15 01:58:55,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-15 01:58:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:58:55,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:55,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:55,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:58:55,173 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:55,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-02-15 01:58:55,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:55,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760336184] [2022-02-15 01:58:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:55,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:55,238 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:58:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:55,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:55,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760336184] [2022-02-15 01:58:55,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [760336184] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:55,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:55,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:58:55,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495917270] [2022-02-15 01:58:55,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:55,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:58:55,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:55,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:58:55,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:58:55,309 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-02-15 01:58:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:55,379 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-02-15 01:58:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:58:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2022-02-15 01:58:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:55,384 INFO L225 Difference]: With dead ends: 26 [2022-02-15 01:58:55,384 INFO L226 Difference]: Without dead ends: 20 [2022-02-15 01:58:55,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:58:55,386 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:55,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:58:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-15 01:58:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-15 01:58:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2022-02-15 01:58:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-15 01:58:55,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-02-15 01:58:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:55,390 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-15 01:58:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-02-15 01:58:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-15 01:58:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:58:55,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:55,391 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:55,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:58:55,392 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2022-02-15 01:58:55,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:55,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427055344] [2022-02-15 01:58:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:55,506 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:55,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:55,565 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:55,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:55,752 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:55,753 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:55,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:55,956 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:55,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427055344] [2022-02-15 01:58:55,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427055344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:55,956 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:55,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:58:55,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944123342] [2022-02-15 01:58:55,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:55,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:58:55,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:58:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:58:55,958 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:56,075 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-02-15 01:58:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:58:56,075 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 01:58:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:56,076 INFO L225 Difference]: With dead ends: 39 [2022-02-15 01:58:56,076 INFO L226 Difference]: Without dead ends: 27 [2022-02-15 01:58:56,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:58:56,077 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:56,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:58:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-15 01:58:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-15 01:58:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2022-02-15 01:58:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-15 01:58:56,082 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-02-15 01:58:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:56,082 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-15 01:58:56,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-15 01:58:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:58:56,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:56,083 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:56,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:58:56,083 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash -510493847, now seen corresponding path program 2 times [2022-02-15 01:58:56,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:56,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452588678] [2022-02-15 01:58:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:56,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:56,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:56,196 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:56,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:56,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:56,294 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:56,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:56,509 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:56,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452588678] [2022-02-15 01:58:56,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452588678] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:56,509 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:56,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:58:56,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579702803] [2022-02-15 01:58:56,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:56,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:58:56,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:58:56,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:58:56,511 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:56,630 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-02-15 01:58:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:58:56,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-15 01:58:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:56,632 INFO L225 Difference]: With dead ends: 42 [2022-02-15 01:58:56,632 INFO L226 Difference]: Without dead ends: 29 [2022-02-15 01:58:56,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:58:56,633 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:56,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-15 01:58:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-15 01:58:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2022-02-15 01:58:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-02-15 01:58:56,637 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2022-02-15 01:58:56,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:56,637 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-02-15 01:58:56,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:56,638 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-02-15 01:58:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:58:56,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:56,638 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:56,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:58:56,638 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:56,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:56,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1246825262, now seen corresponding path program 3 times [2022-02-15 01:58:56,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:56,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069788239] [2022-02-15 01:58:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:56,707 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:56,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:56,729 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:56,752 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:56,820 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:56,820 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:56,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:56,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:57,005 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:57,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069788239] [2022-02-15 01:58:57,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1069788239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:57,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:57,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:58:57,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106358477] [2022-02-15 01:58:57,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:57,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:58:57,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:58:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:58:57,007 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2022-02-15 01:58:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:57,134 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-02-15 01:58:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:58:57,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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 [2022-02-15 01:58:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:57,135 INFO L225 Difference]: With dead ends: 44 [2022-02-15 01:58:57,135 INFO L226 Difference]: Without dead ends: 31 [2022-02-15 01:58:57,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:58:57,136 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:57,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-15 01:58:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-15 01:58:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-02-15 01:58:57,140 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2022-02-15 01:58:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-02-15 01:58:57,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2022-02-15 01:58:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-02-15 01:58:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:58:57,141 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:57,141 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:57,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:58:57,141 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2108341683, now seen corresponding path program 4 times [2022-02-15 01:58:57,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:57,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822850033] [2022-02-15 01:58:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:57,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:57,216 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:57,217 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:57,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:57,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:57,277 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:57,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:57,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:57,456 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:57,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822850033] [2022-02-15 01:58:57,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822850033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:57,457 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:57,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:58:57,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957575694] [2022-02-15 01:58:57,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:57,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:58:57,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:57,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:58:57,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:58:57,458 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2022-02-15 01:58:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:57,613 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-02-15 01:58:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:58:57,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 [2022-02-15 01:58:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:57,614 INFO L225 Difference]: With dead ends: 55 [2022-02-15 01:58:57,614 INFO L226 Difference]: Without dead ends: 42 [2022-02-15 01:58:57,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:58:57,616 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:57,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-15 01:58:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-02-15 01:58:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-15 01:58:57,629 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2022-02-15 01:58:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:57,629 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-15 01:58:57,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2022-02-15 01:58:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-15 01:58:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:58:57,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:57,630 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:57,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:58:57,630 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1965893626, now seen corresponding path program 5 times [2022-02-15 01:58:57,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:57,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171837989] [2022-02-15 01:58:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:57,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:57,739 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:57,740 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:57,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:57,824 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:57,824 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:57,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:57,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:58,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:58,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171837989] [2022-02-15 01:58:58,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [171837989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:58,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:58,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:58:58,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449939645] [2022-02-15 01:58:58,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:58,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:58:58,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:58,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:58:58,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:58:58,102 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:58,339 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2022-02-15 01:58:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:58:58,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 01:58:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:58,340 INFO L225 Difference]: With dead ends: 72 [2022-02-15 01:58:58,340 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 01:58:58,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:58:58,341 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:58,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 01:58:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-15 01:58:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 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) [2022-02-15 01:58:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-02-15 01:58:58,346 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2022-02-15 01:58:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:58,346 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-02-15 01:58:58,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-02-15 01:58:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:58:58,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:58,347 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:58,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:58:58,347 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash 445199841, now seen corresponding path program 6 times [2022-02-15 01:58:58,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:58,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798405991] [2022-02-15 01:58:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:58,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:58,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:58,442 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:58,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:58,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:58,533 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:58,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:58,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:58,824 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:58,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798405991] [2022-02-15 01:58:58,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1798405991] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:58,825 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:58,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:58:58,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638199360] [2022-02-15 01:58:58,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:58,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:58:58,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:58,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:58:58,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:58:58,826 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:59,096 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-02-15 01:58:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:58:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 01:58:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:59,097 INFO L225 Difference]: With dead ends: 74 [2022-02-15 01:58:59,097 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 01:58:59,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:58:59,098 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:59,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 75 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:59,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 01:58:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-15 01:58:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-02-15 01:58:59,103 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 33 [2022-02-15 01:58:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:59,103 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-02-15 01:58:59,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-02-15 01:58:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:58:59,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:59,104 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:59,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:58:59,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1776318212, now seen corresponding path program 7 times [2022-02-15 01:58:59,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:59,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516484581] [2022-02-15 01:58:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:59,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:59,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:59,196 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:59,215 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:59,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:59,276 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:59,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:59,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:59,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516484581] [2022-02-15 01:58:59,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516484581] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:59,565 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:59,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:58:59,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331806655] [2022-02-15 01:58:59,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:59,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:58:59,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:59,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:58:59,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:58:59,566 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:59,889 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-02-15 01:58:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:58:59,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:58:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:59,890 INFO L225 Difference]: With dead ends: 77 [2022-02-15 01:58:59,890 INFO L226 Difference]: Without dead ends: 53 [2022-02-15 01:58:59,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:58:59,891 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:59,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-15 01:58:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-15 01:58:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 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) [2022-02-15 01:58:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-02-15 01:58:59,896 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 35 [2022-02-15 01:58:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:59,897 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-02-15 01:58:59,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-02-15 01:58:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:58:59,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:59,897 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:59,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:58:59,898 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash 710995180, now seen corresponding path program 8 times [2022-02-15 01:58:59,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:59,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178438726] [2022-02-15 01:58:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:59,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:59,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:58:59,966 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:58:59,987 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:00,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:00,034 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:00,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:00,336 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:00,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178438726] [2022-02-15 01:59:00,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1178438726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:00,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:00,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:59:00,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419590832] [2022-02-15 01:59:00,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:00,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:59:00,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:00,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:59:00,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:59:00,338 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:00,672 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-02-15 01:59:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:59:00,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 [2022-02-15 01:59:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:00,673 INFO L225 Difference]: With dead ends: 80 [2022-02-15 01:59:00,673 INFO L226 Difference]: Without dead ends: 55 [2022-02-15 01:59:00,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:59:00,674 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:00,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 85 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:59:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-15 01:59:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-15 01:59:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.1) internal successors, (55), 50 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) [2022-02-15 01:59:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-02-15 01:59:00,694 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 38 [2022-02-15 01:59:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:00,694 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-02-15 01:59:00,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-02-15 01:59:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:59:00,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:00,695 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:00,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:59:00,695 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:00,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1289310897, now seen corresponding path program 9 times [2022-02-15 01:59:00,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:00,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388831902] [2022-02-15 01:59:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:00,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:00,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:00,770 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:00,789 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:00,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:00,835 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:00,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:00,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:01,154 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:01,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388831902] [2022-02-15 01:59:01,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [388831902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:01,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:01,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:59:01,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490859131] [2022-02-15 01:59:01,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:01,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:59:01,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:01,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:59:01,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:59:01,155 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:01,544 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-02-15 01:59:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:59:01,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 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 [2022-02-15 01:59:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:01,545 INFO L225 Difference]: With dead ends: 82 [2022-02-15 01:59:01,545 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 01:59:01,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:59:01,546 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:01,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:59:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 01:59:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-15 01:59:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 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) [2022-02-15 01:59:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-02-15 01:59:01,552 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 40 [2022-02-15 01:59:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:01,552 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-02-15 01:59:01,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-02-15 01:59:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:59:01,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:01,552 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:01,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:59:01,553 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1295033546, now seen corresponding path program 10 times [2022-02-15 01:59:01,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:01,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705604550] [2022-02-15 01:59:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:01,640 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:01,681 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:01,682 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:01,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:01,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:01,784 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:01,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:02,126 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:02,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705604550] [2022-02-15 01:59:02,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1705604550] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:02,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:02,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:59:02,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929965236] [2022-02-15 01:59:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:02,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:59:02,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:59:02,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:59:02,128 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:02,522 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-02-15 01:59:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:59:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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 [2022-02-15 01:59:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:02,523 INFO L225 Difference]: With dead ends: 85 [2022-02-15 01:59:02,523 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 01:59:02,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:59:02,524 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:02,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 30 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:59:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 01:59:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-15 01:59:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 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) [2022-02-15 01:59:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-02-15 01:59:02,529 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 42 [2022-02-15 01:59:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:02,529 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-02-15 01:59:02,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-02-15 01:59:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 01:59:02,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:02,530 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:02,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:59:02,530 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:02,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:02,530 INFO L85 PathProgramCache]: Analyzing trace with hash -77349816, now seen corresponding path program 11 times [2022-02-15 01:59:02,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:02,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410343813] [2022-02-15 01:59:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:02,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:02,605 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:02,605 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:02,630 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:02,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:02,676 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:02,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:03,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:03,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410343813] [2022-02-15 01:59:03,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [410343813] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:03,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:03,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:59:03,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943601397] [2022-02-15 01:59:03,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:03,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:59:03,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:03,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:59:03,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:59:03,051 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:03,518 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-02-15 01:59:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:59:03,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 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 [2022-02-15 01:59:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:03,519 INFO L225 Difference]: With dead ends: 88 [2022-02-15 01:59:03,519 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 01:59:03,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:59:03,521 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:03,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 100 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:59:03,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 01:59:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-15 01:59:03,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 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) [2022-02-15 01:59:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-02-15 01:59:03,526 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 45 [2022-02-15 01:59:03,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:03,526 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-02-15 01:59:03,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-02-15 01:59:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:59:03,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:03,527 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:03,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:59:03,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:03,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:03,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1759985379, now seen corresponding path program 12 times [2022-02-15 01:59:03,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:03,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662118110] [2022-02-15 01:59:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:03,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:03,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:03,658 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:03,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:03,730 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:03,730 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:03,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:04,122 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:04,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662118110] [2022-02-15 01:59:04,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [662118110] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:04,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:04,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:59:04,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387348354] [2022-02-15 01:59:04,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:04,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:59:04,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:04,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:59:04,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:59:04,124 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:04,698 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-02-15 01:59:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:59:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2022-02-15 01:59:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:04,700 INFO L225 Difference]: With dead ends: 90 [2022-02-15 01:59:04,700 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 01:59:04,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:59:04,703 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:04,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 110 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:59:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 01:59:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-15 01:59:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 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) [2022-02-15 01:59:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-02-15 01:59:04,714 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 47 [2022-02-15 01:59:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:04,715 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-02-15 01:59:04,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-02-15 01:59:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:59:04,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:04,716 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:04,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:59:04,717 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:04,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2087418178, now seen corresponding path program 13 times [2022-02-15 01:59:04,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:04,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004867717] [2022-02-15 01:59:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:04,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:04,843 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:04,843 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:04,873 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:04,968 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:04,968 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:04,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:05,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:05,481 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:05,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004867717] [2022-02-15 01:59:05,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004867717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:05,481 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:05,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:59:05,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641255972] [2022-02-15 01:59:05,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:05,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:59:05,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:59:05,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:59:05,483 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:06,078 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2022-02-15 01:59:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:59:06,078 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 [2022-02-15 01:59:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:06,079 INFO L225 Difference]: With dead ends: 92 [2022-02-15 01:59:06,079 INFO L226 Difference]: Without dead ends: 66 [2022-02-15 01:59:06,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:59:06,080 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:06,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 115 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:59:06,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-15 01:59:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-02-15 01:59:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-02-15 01:59:06,085 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 49 [2022-02-15 01:59:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:06,085 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-02-15 01:59:06,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:06,085 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-02-15 01:59:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:59:06,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:06,086 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:06,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:59:06,086 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:06,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:06,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1475394599, now seen corresponding path program 14 times [2022-02-15 01:59:06,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:06,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269515009] [2022-02-15 01:59:06,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:06,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:06,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:06,160 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:06,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:06,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:06,254 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:06,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:06,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:06,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:06,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269515009] [2022-02-15 01:59:06,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [269515009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:06,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:06,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:59:06,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011446000] [2022-02-15 01:59:06,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:06,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:59:06,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:59:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:59:06,629 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:07,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:07,218 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2022-02-15 01:59:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:59:07,218 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 [2022-02-15 01:59:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:07,219 INFO L225 Difference]: With dead ends: 115 [2022-02-15 01:59:07,219 INFO L226 Difference]: Without dead ends: 89 [2022-02-15 01:59:07,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=567, Invalid=1983, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:59:07,230 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:07,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 29 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:59:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-15 01:59:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2022-02-15 01:59:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 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) [2022-02-15 01:59:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-02-15 01:59:07,239 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 51 [2022-02-15 01:59:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:07,239 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-02-15 01:59:07,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-02-15 01:59:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:59:07,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:07,240 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:07,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:59:07,243 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:07,244 INFO L85 PathProgramCache]: Analyzing trace with hash -856023180, now seen corresponding path program 15 times [2022-02-15 01:59:07,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:07,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578370887] [2022-02-15 01:59:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:07,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:07,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:07,326 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:07,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:07,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:07,415 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:07,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:07,781 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:07,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578370887] [2022-02-15 01:59:07,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578370887] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:07,781 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:07,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:59:07,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328763132] [2022-02-15 01:59:07,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:07,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:59:07,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:59:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:59:07,783 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:08,538 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2022-02-15 01:59:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:59:08,539 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 [2022-02-15 01:59:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:08,539 INFO L225 Difference]: With dead ends: 111 [2022-02-15 01:59:08,539 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 01:59:08,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=2487, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:59:08,541 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:08,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 44 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:59:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 01:59:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-15 01:59:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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) [2022-02-15 01:59:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-02-15 01:59:08,545 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 56 [2022-02-15 01:59:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:08,545 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-02-15 01:59:08,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-02-15 01:59:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:59:08,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:08,546 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:08,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:59:08,546 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:08,546 INFO L85 PathProgramCache]: Analyzing trace with hash -400630811, now seen corresponding path program 16 times [2022-02-15 01:59:08,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:08,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969804227] [2022-02-15 01:59:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:08,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:08,643 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:08,643 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:08,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:08,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:08,716 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:08,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:08,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:09,238 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:09,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969804227] [2022-02-15 01:59:09,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969804227] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:09,239 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:09,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:09,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128273138] [2022-02-15 01:59:09,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:09,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:09,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:09,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:09,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:59:09,240 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 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) [2022-02-15 01:59:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:10,154 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2022-02-15 01:59:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:59:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 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 [2022-02-15 01:59:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:10,156 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:59:10,156 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:59:10,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=3066, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:59:10,157 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:10,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 125 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:59:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:59:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-02-15 01:59:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-02-15 01:59:10,167 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 61 [2022-02-15 01:59:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:10,168 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-02-15 01:59:10,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 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) [2022-02-15 01:59:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-02-15 01:59:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:59:10,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:10,170 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:10,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:59:10,170 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:10,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:10,171 INFO L85 PathProgramCache]: Analyzing trace with hash 154650752, now seen corresponding path program 17 times [2022-02-15 01:59:10,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:10,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380483732] [2022-02-15 01:59:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:10,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:10,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:10,242 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:10,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:10,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:10,317 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:10,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:10,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:10,945 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:10,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380483732] [2022-02-15 01:59:10,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [380483732] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:10,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:10,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:59:10,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171590985] [2022-02-15 01:59:10,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:10,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:10,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:59:10,947 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:11,918 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2022-02-15 01:59:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:59:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 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 [2022-02-15 01:59:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:11,920 INFO L225 Difference]: With dead ends: 160 [2022-02-15 01:59:11,920 INFO L226 Difference]: Without dead ends: 106 [2022-02-15 01:59:11,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=3292, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:59:11,922 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:11,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 135 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:59:11,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-15 01:59:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-02-15 01:59:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-02-15 01:59:11,935 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 63 [2022-02-15 01:59:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:11,936 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-02-15 01:59:11,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-02-15 01:59:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:59:11,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:11,937 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:11,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:59:11,937 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1204288091, now seen corresponding path program 18 times [2022-02-15 01:59:11,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:11,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500769212] [2022-02-15 01:59:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:11,996 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:12,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:12,016 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:12,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:12,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:12,103 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:12,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:12,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:12,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:12,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500769212] [2022-02-15 01:59:12,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1500769212] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:12,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:12,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:59:12,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100681674] [2022-02-15 01:59:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:59:12,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:59:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:59:12,601 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 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) [2022-02-15 01:59:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:13,304 INFO L93 Difference]: Finished difference Result 162 states and 171 transitions. [2022-02-15 01:59:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:59:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 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 [2022-02-15 01:59:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:13,305 INFO L225 Difference]: With dead ends: 162 [2022-02-15 01:59:13,305 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 01:59:13,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=3526, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:59:13,307 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:13,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 145 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:59:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 01:59:13,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-02-15 01:59:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-02-15 01:59:13,318 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 65 [2022-02-15 01:59:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:13,318 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-02-15 01:59:13,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 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) [2022-02-15 01:59:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-02-15 01:59:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 01:59:13,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:13,319 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:13,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:59:13,319 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash 588456310, now seen corresponding path program 19 times [2022-02-15 01:59:13,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:13,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162429589] [2022-02-15 01:59:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:13,357 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:13,375 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:13,375 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:13,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:13,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:13,460 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:13,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:14,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:14,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162429589] [2022-02-15 01:59:14,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162429589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:14,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:14,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:59:14,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535778405] [2022-02-15 01:59:14,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:14,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:59:14,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:14,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:59:14,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:59:14,011 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 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) [2022-02-15 01:59:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:14,953 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2022-02-15 01:59:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:59:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 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 [2022-02-15 01:59:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:14,957 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:59:14,957 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:59:14,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=3768, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:59:14,959 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:14,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 140 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:59:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:59:14,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-02-15 01:59:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-02-15 01:59:14,969 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 67 [2022-02-15 01:59:14,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:14,969 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-02-15 01:59:14,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 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) [2022-02-15 01:59:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-02-15 01:59:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:59:14,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:14,969 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:14,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:59:14,970 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1479601617, now seen corresponding path program 20 times [2022-02-15 01:59:14,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:14,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484468503] [2022-02-15 01:59:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:15,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:15,047 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:15,047 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:15,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:15,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:15,138 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:15,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:15,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:15,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:15,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484468503] [2022-02-15 01:59:15,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484468503] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:15,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:15,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:59:15,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928578900] [2022-02-15 01:59:15,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:15,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:59:15,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:59:15,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:59:15,624 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:16,488 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2022-02-15 01:59:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:59:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 01:59:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:16,489 INFO L225 Difference]: With dead ends: 177 [2022-02-15 01:59:16,489 INFO L226 Difference]: Without dead ends: 123 [2022-02-15 01:59:16,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=3980, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:59:16,491 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:16,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 24 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:59:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-15 01:59:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 75. [2022-02-15 01:59:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-02-15 01:59:16,496 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 69 [2022-02-15 01:59:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:16,496 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-02-15 01:59:16,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-02-15 01:59:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:59:16,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:16,497 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:16,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:59:16,497 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:16,497 INFO L85 PathProgramCache]: Analyzing trace with hash 329111036, now seen corresponding path program 21 times [2022-02-15 01:59:16,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:16,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658726885] [2022-02-15 01:59:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:16,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:16,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:16,566 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:16,592 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:16,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:16,653 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:16,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:16,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:17,376 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:17,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658726885] [2022-02-15 01:59:17,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658726885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:17,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:17,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:59:17,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582646539] [2022-02-15 01:59:17,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:17,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:59:17,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:17,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:59:17,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1389, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:59:17,379 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:18,695 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2022-02-15 01:59:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:59:18,696 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:59:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:18,696 INFO L225 Difference]: With dead ends: 197 [2022-02-15 01:59:18,696 INFO L226 Difference]: Without dead ends: 130 [2022-02-15 01:59:18,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1166, Invalid=5154, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:59:18,698 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:18,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 95 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:59:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-15 01:59:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-02-15 01:59:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-02-15 01:59:18,707 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 74 [2022-02-15 01:59:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:18,707 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-02-15 01:59:18,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-02-15 01:59:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:59:18,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:18,708 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:18,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:59:18,708 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:18,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1730178626, now seen corresponding path program 22 times [2022-02-15 01:59:18,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:18,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994277251] [2022-02-15 01:59:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:18,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:18,784 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:18,784 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:18,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:18,875 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:18,876 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:19,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:19,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:19,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994277251] [2022-02-15 01:59:19,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [994277251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:19,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:19,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 01:59:19,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604606612] [2022-02-15 01:59:19,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:19,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 01:59:19,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 01:59:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1812, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:59:19,747 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:21,143 INFO L93 Difference]: Finished difference Result 200 states and 209 transitions. [2022-02-15 01:59:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:59:21,144 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:59:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:21,145 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:59:21,145 INFO L226 Difference]: Without dead ends: 132 [2022-02-15 01:59:21,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=317, Invalid=5085, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:59:21,146 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:21,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 170 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:59:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-15 01:59:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-02-15 01:59:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-02-15 01:59:21,159 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 77 [2022-02-15 01:59:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:21,159 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-02-15 01:59:21,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-02-15 01:59:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 01:59:21,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:21,176 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:21,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:59:21,177 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash -944061219, now seen corresponding path program 23 times [2022-02-15 01:59:21,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:21,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151505741] [2022-02-15 01:59:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:21,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:21,256 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:21,257 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:21,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:21,330 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:21,330 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:21,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:21,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:22,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:22,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151505741] [2022-02-15 01:59:22,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [151505741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:22,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:22,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 01:59:22,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893140948] [2022-02-15 01:59:22,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:22,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 01:59:22,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:22,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 01:59:22,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1349, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:59:22,048 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:23,348 INFO L93 Difference]: Finished difference Result 209 states and 225 transitions. [2022-02-15 01:59:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:59:23,349 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-02-15 01:59:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:23,349 INFO L225 Difference]: With dead ends: 209 [2022-02-15 01:59:23,349 INFO L226 Difference]: Without dead ends: 141 [2022-02-15 01:59:23,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1365, Invalid=5441, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:59:23,351 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:23,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 39 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:59:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-15 01:59:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2022-02-15 01:59:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-02-15 01:59:23,357 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 79 [2022-02-15 01:59:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:23,357 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-02-15 01:59:23,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-02-15 01:59:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-15 01:59:23,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:23,358 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:23,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:59:23,358 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1289024528, now seen corresponding path program 24 times [2022-02-15 01:59:23,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:23,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064029137] [2022-02-15 01:59:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:23,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:23,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:23,464 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:23,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:23,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:23,539 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:23,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:23,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:24,369 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:24,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064029137] [2022-02-15 01:59:24,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064029137] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:24,369 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:24,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 01:59:24,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141727865] [2022-02-15 01:59:24,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:24,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 01:59:24,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 01:59:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=1543, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:59:24,372 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:25,612 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2022-02-15 01:59:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:59:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-02-15 01:59:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:25,613 INFO L225 Difference]: With dead ends: 167 [2022-02-15 01:59:25,613 INFO L226 Difference]: Without dead ends: 90 [2022-02-15 01:59:25,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1575, Invalid=6257, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 01:59:25,614 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:25,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 54 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:59:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-15 01:59:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-02-15 01:59:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-02-15 01:59:25,621 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 84 [2022-02-15 01:59:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:25,621 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-02-15 01:59:25,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-02-15 01:59:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:59:25,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:25,623 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:25,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:59:25,623 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2142809623, now seen corresponding path program 25 times [2022-02-15 01:59:25,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:25,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804231148] [2022-02-15 01:59:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:25,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:25,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:25,706 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:25,736 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:25,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:25,783 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:25,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:25,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:26,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:26,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804231148] [2022-02-15 01:59:26,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [804231148] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:26,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:26,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-15 01:59:26,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965680548] [2022-02-15 01:59:26,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:26,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-15 01:59:26,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:26,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-15 01:59:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2444, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:59:26,720 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:28,495 INFO L93 Difference]: Finished difference Result 238 states and 248 transitions. [2022-02-15 01:59:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:59:28,496 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:59:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:28,496 INFO L225 Difference]: With dead ends: 238 [2022-02-15 01:59:28,497 INFO L226 Difference]: Without dead ends: 156 [2022-02-15 01:59:28,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=382, Invalid=6928, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 01:59:28,497 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:28,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 210 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:59:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-15 01:59:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-02-15 01:59:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-02-15 01:59:28,509 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 89 [2022-02-15 01:59:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:28,509 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-02-15 01:59:28,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-02-15 01:59:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 01:59:28,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:28,510 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:28,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:59:28,510 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:28,510 INFO L85 PathProgramCache]: Analyzing trace with hash 929404932, now seen corresponding path program 26 times [2022-02-15 01:59:28,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:28,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781339743] [2022-02-15 01:59:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:28,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:28,602 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:28,602 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:28,620 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:28,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:28,664 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:28,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:28,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:29,551 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:29,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781339743] [2022-02-15 01:59:29,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781339743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:29,551 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:29,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:59:29,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555928343] [2022-02-15 01:59:29,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:29,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:59:29,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:29,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:59:29,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1833, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:59:29,552 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 50 states, 50 states have (on average 1.74) internal successors, (87), 49 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:31,418 INFO L93 Difference]: Finished difference Result 245 states and 259 transitions. [2022-02-15 01:59:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:59:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 49 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-02-15 01:59:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:31,419 INFO L225 Difference]: With dead ends: 245 [2022-02-15 01:59:31,420 INFO L226 Difference]: Without dead ends: 163 [2022-02-15 01:59:31,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1845, Invalid=7467, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:59:31,422 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 154 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:31,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 59 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2470 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:59:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-02-15 01:59:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 97. [2022-02-15 01:59:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-02-15 01:59:31,429 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 91 [2022-02-15 01:59:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:31,429 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-02-15 01:59:31,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 49 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-02-15 01:59:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-15 01:59:31,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:31,429 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:31,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:59:31,430 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:31,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash 274480809, now seen corresponding path program 27 times [2022-02-15 01:59:31,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:31,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135671478] [2022-02-15 01:59:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:31,477 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:31,495 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:31,495 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:31,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:31,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:31,556 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:31,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:31,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:32,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:32,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135671478] [2022-02-15 01:59:32,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1135671478] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:32,840 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:32,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:59:32,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029303480] [2022-02-15 01:59:32,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:32,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:59:32,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:59:32,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2849, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:59:32,841 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 52 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:35,011 INFO L93 Difference]: Finished difference Result 258 states and 268 transitions. [2022-02-15 01:59:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:59:35,026 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 52 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-02-15 01:59:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:35,027 INFO L225 Difference]: With dead ends: 258 [2022-02-15 01:59:35,027 INFO L226 Difference]: Without dead ends: 169 [2022-02-15 01:59:35,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=420, Invalid=8136, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:59:35,028 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:35,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 220 Invalid, 3446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3403 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:59:35,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-02-15 01:59:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-02-15 01:59:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0304878048780488) internal successors, (169), 164 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2022-02-15 01:59:35,040 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 96 [2022-02-15 01:59:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:35,041 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2022-02-15 01:59:35,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 52 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2022-02-15 01:59:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-15 01:59:35,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:35,041 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:35,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:59:35,041 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:35,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:35,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1115878446, now seen corresponding path program 28 times [2022-02-15 01:59:35,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:35,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558500893] [2022-02-15 01:59:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:35,090 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:35,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:35,110 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:35,129 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:35,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:35,191 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:35,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:35,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:36,198 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:36,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558500893] [2022-02-15 01:59:36,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558500893] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:36,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:36,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 01:59:36,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319685052] [2022-02-15 01:59:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:36,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 01:59:36,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:36,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 01:59:36,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2958, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:59:36,200 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:38,210 INFO L93 Difference]: Finished difference Result 260 states and 269 transitions. [2022-02-15 01:59:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:59:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-02-15 01:59:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:38,211 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:59:38,212 INFO L226 Difference]: Without dead ends: 171 [2022-02-15 01:59:38,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=428, Invalid=8502, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:59:38,212 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 3485 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:38,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 220 Invalid, 3528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3485 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:59:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-15 01:59:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-02-15 01:59:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 166 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-02-15 01:59:38,225 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 98 [2022-02-15 01:59:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:38,225 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-02-15 01:59:38,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-02-15 01:59:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-15 01:59:38,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:38,226 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:38,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:59:38,226 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:38,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2049811341, now seen corresponding path program 29 times [2022-02-15 01:59:38,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:38,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803791564] [2022-02-15 01:59:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:38,288 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,310 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,310 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:38,329 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,389 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:38,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:38,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:39,557 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:39,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803791564] [2022-02-15 01:59:39,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803791564] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:39,558 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:39,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-15 01:59:39,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736790333] [2022-02-15 01:59:39,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:39,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 01:59:39,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 01:59:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:59:39,559 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:41,921 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2022-02-15 01:59:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 01:59:41,921 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-02-15 01:59:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:41,922 INFO L225 Difference]: With dead ends: 263 [2022-02-15 01:59:41,922 INFO L226 Difference]: Without dead ends: 174 [2022-02-15 01:59:41,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2177, Invalid=9813, Unknown=0, NotChecked=0, Total=11990 [2022-02-15 01:59:41,924 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 209 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3153 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 3153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:41,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 35 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 3153 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:59:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-15 01:59:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-02-15 01:59:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-02-15 01:59:41,943 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 100 [2022-02-15 01:59:41,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:41,943 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-02-15 01:59:41,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:41,943 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-02-15 01:59:41,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-15 01:59:41,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:41,944 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:41,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:59:41,944 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash 743336683, now seen corresponding path program 30 times [2022-02-15 01:59:41,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:41,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467956055] [2022-02-15 01:59:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:42,015 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:42,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:42,034 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:42,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:42,113 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:42,113 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:42,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:43,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:43,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467956055] [2022-02-15 01:59:43,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [467956055] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:43,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:43,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-15 01:59:43,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353414670] [2022-02-15 01:59:43,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:43,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-15 01:59:43,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:43,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-15 01:59:43,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=882, Invalid=2658, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:59:43,303 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:45,762 INFO L93 Difference]: Finished difference Result 267 states and 277 transitions. [2022-02-15 01:59:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:59:45,762 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-02-15 01:59:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:45,763 INFO L225 Difference]: With dead ends: 267 [2022-02-15 01:59:45,763 INFO L226 Difference]: Without dead ends: 177 [2022-02-15 01:59:45,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2483, Invalid=10399, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 01:59:45,765 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3313 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:45,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 64 Invalid, 3414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3313 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:59:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-15 01:59:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-02-15 01:59:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 172 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-02-15 01:59:45,779 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 103 [2022-02-15 01:59:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:45,780 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-02-15 01:59:45,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-02-15 01:59:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-15 01:59:45,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:45,780 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:45,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:59:45,780 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1976342109, now seen corresponding path program 31 times [2022-02-15 01:59:45,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:45,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972832560] [2022-02-15 01:59:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:45,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:45,866 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:45,866 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:45,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:45,944 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:45,945 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:45,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:46,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:47,452 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:47,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972832560] [2022-02-15 01:59:47,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1972832560] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:47,453 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:47,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:59:47,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066184066] [2022-02-15 01:59:47,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:47,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:59:47,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:47,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:59:47,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3508, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:59:47,454 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 58 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:49,283 INFO L93 Difference]: Finished difference Result 270 states and 279 transitions. [2022-02-15 01:59:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:59:49,284 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 58 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-02-15 01:59:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:49,285 INFO L225 Difference]: With dead ends: 270 [2022-02-15 01:59:49,285 INFO L226 Difference]: Without dead ends: 179 [2022-02-15 01:59:49,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=483, Invalid=10023, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:59:49,286 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 3917 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 3963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:49,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 230 Invalid, 3963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3917 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:59:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-15 01:59:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-02-15 01:59:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-02-15 01:59:49,300 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 106 [2022-02-15 01:59:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:49,300 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-02-15 01:59:49,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 58 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-02-15 01:59:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-15 01:59:49,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:49,301 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:49,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:59:49,301 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:49,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1113200222, now seen corresponding path program 32 times [2022-02-15 01:59:49,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:49,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735311016] [2022-02-15 01:59:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:49,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:49,391 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:49,391 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:49,429 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:49,501 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:49,501 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:49,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:49,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:50,758 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:50,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735311016] [2022-02-15 01:59:50,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [735311016] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:50,759 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:50,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-15 01:59:50,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253240826] [2022-02-15 01:59:50,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:50,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 01:59:50,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:50,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 01:59:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=2647, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:59:50,760 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:53,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:53,503 INFO L93 Difference]: Finished difference Result 285 states and 307 transitions. [2022-02-15 01:59:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:59:53,504 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-02-15 01:59:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:53,504 INFO L225 Difference]: With dead ends: 285 [2022-02-15 01:59:53,504 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:59:53,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2673, Invalid=10899, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:59:53,506 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 181 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3528 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 3776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:53,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 29 Invalid, 3776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3528 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:59:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:59:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 114. [2022-02-15 01:59:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.036697247706422) internal successors, (113), 109 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-02-15 01:59:53,518 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 108 [2022-02-15 01:59:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:53,518 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-02-15 01:59:53,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-02-15 01:59:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-15 01:59:53,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:53,519 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:53,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:59:53,519 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash -329799561, now seen corresponding path program 33 times [2022-02-15 01:59:53,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:53,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078876173] [2022-02-15 01:59:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:53,570 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:53,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:53,596 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:53,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:53,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:53,668 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:53,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:53,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:54,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:54,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078876173] [2022-02-15 01:59:54,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078876173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:54,663 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:54,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-15 01:59:54,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294943248] [2022-02-15 01:59:54,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:54,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-15 01:59:54,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:54,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-15 01:59:54,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:59:54,666 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:57,035 INFO L93 Difference]: Finished difference Result 307 states and 318 transitions. [2022-02-15 01:59:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:59:57,036 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-02-15 01:59:57,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:57,037 INFO L225 Difference]: With dead ends: 307 [2022-02-15 01:59:57,037 INFO L226 Difference]: Without dead ends: 201 [2022-02-15 01:59:57,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2966, Invalid=12784, Unknown=0, NotChecked=0, Total=15750 [2022-02-15 01:59:57,038 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 145 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3907 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 4066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:57,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 90 Invalid, 4066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3907 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:59:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-15 01:59:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-02-15 01:59:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0255102040816326) internal successors, (201), 196 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-02-15 01:59:57,096 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 113 [2022-02-15 01:59:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:57,097 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-02-15 01:59:57,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-02-15 01:59:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 01:59:57,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:57,097 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:57,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:59:57,098 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash 637790225, now seen corresponding path program 34 times [2022-02-15 01:59:57,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:57,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225524840] [2022-02-15 01:59:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:57,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:57,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:57,200 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:57,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:57,297 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:57,297 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:57,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:57,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:58,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:58,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225524840] [2022-02-15 01:59:58,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [225524840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:58,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:58,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:59:58,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942165505] [2022-02-15 01:59:58,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:58,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:59:58,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:59:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=3392, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:59:58,734 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 65 states, 65 states have (on average 1.7230769230769232) internal successors, (112), 64 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:01,899 INFO L93 Difference]: Finished difference Result 311 states and 321 transitions. [2022-02-15 02:00:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 02:00:01,899 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7230769230769232) internal successors, (112), 64 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-02-15 02:00:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:01,900 INFO L225 Difference]: With dead ends: 311 [2022-02-15 02:00:01,901 INFO L226 Difference]: Without dead ends: 204 [2022-02-15 02:00:01,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3307, Invalid=13463, Unknown=0, NotChecked=0, Total=16770 [2022-02-15 02:00:01,902 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 240 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 4276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:01,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 49 Invalid, 4531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 4276 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:00:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-15 02:00:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-02-15 02:00:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2022-02-15 02:00:01,936 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 116 [2022-02-15 02:00:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:01,937 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2022-02-15 02:00:01,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7230769230769232) internal successors, (112), 64 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2022-02-15 02:00:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-15 02:00:01,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:01,949 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:01,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 02:00:01,949 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:01,950 INFO L85 PathProgramCache]: Analyzing trace with hash -828523251, now seen corresponding path program 35 times [2022-02-15 02:00:01,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:01,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700420179] [2022-02-15 02:00:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:02,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:02,048 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:02,048 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:02,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:02,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:02,133 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:02,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:02,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:03,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:03,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700420179] [2022-02-15 02:00:03,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [700420179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:03,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:03,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-15 02:00:03,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174330170] [2022-02-15 02:00:03,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:03,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-15 02:00:03,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:03,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-15 02:00:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=4487, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 02:00:03,401 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:05,628 INFO L93 Difference]: Finished difference Result 314 states and 323 transitions. [2022-02-15 02:00:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 02:00:05,628 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-02-15 02:00:05,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:05,629 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:00:05,629 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 02:00:05,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=577, Invalid=12763, Unknown=0, NotChecked=0, Total=13340 [2022-02-15 02:00:05,631 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 5000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:05,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 260 Invalid, 5000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:00:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 02:00:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-02-15 02:00:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0248756218905473) internal successors, (206), 201 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2022-02-15 02:00:05,668 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 119 [2022-02-15 02:00:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:05,669 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2022-02-15 02:00:05,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2022-02-15 02:00:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-15 02:00:05,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:05,669 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:05,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 02:00:05,670 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1735745048, now seen corresponding path program 36 times [2022-02-15 02:00:05,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:05,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61283197] [2022-02-15 02:00:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:05,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:05,742 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:05,742 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:05,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:05,814 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:05,814 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:06,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:07,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:07,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61283197] [2022-02-15 02:00:07,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [61283197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:07,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:07,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 02:00:07,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551301854] [2022-02-15 02:00:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:07,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 02:00:07,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 02:00:07,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:00:07,352 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 68 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 67 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:09,767 INFO L93 Difference]: Finished difference Result 316 states and 325 transitions. [2022-02-15 02:00:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 02:00:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 67 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-02-15 02:00:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:09,776 INFO L225 Difference]: With dead ends: 316 [2022-02-15 02:00:09,776 INFO L226 Difference]: Without dead ends: 208 [2022-02-15 02:00:09,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=585, Invalid=13221, Unknown=0, NotChecked=0, Total=13806 [2022-02-15 02:00:09,787 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 5253 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 5305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:09,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 270 Invalid, 5305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5253 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:00:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-15 02:00:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-02-15 02:00:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 203 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2022-02-15 02:00:09,807 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 121 [2022-02-15 02:00:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:09,808 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2022-02-15 02:00:09,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 67 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2022-02-15 02:00:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-02-15 02:00:09,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:09,809 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:09,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 02:00:09,809 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1697530877, now seen corresponding path program 37 times [2022-02-15 02:00:09,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:09,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596824362] [2022-02-15 02:00:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:09,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:09,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:09,910 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:09,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:09,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:09,976 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:10,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:11,929 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:11,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596824362] [2022-02-15 02:00:11,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [596824362] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:11,930 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:11,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-15 02:00:11,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054593688] [2022-02-15 02:00:11,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:11,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-15 02:00:11,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:11,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-15 02:00:11,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 02:00:11,931 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 68 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:15,195 INFO L93 Difference]: Finished difference Result 318 states and 327 transitions. [2022-02-15 02:00:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 02:00:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 68 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-02-15 02:00:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:15,196 INFO L225 Difference]: With dead ends: 318 [2022-02-15 02:00:15,196 INFO L226 Difference]: Without dead ends: 210 [2022-02-15 02:00:15,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=593, Invalid=13687, Unknown=0, NotChecked=0, Total=14280 [2022-02-15 02:00:15,198 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 5565 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 5618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 5565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:15,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 280 Invalid, 5618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 5565 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:00:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-15 02:00:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-02-15 02:00:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.024390243902439) internal successors, (210), 205 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2022-02-15 02:00:15,217 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 123 [2022-02-15 02:00:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:15,217 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2022-02-15 02:00:15,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 68 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2022-02-15 02:00:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-15 02:00:15,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:15,218 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:15,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 02:00:15,218 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:15,219 INFO L85 PathProgramCache]: Analyzing trace with hash 666549086, now seen corresponding path program 38 times [2022-02-15 02:00:15,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:15,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292855904] [2022-02-15 02:00:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:15,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:15,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:15,318 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:15,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:15,403 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:15,403 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:15,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:15,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:17,126 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:17,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292855904] [2022-02-15 02:00:17,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [292855904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:17,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:17,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 02:00:17,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900398622] [2022-02-15 02:00:17,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:17,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 02:00:17,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 02:00:17,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1318, Invalid=3938, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:00:17,128 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 70 states, 70 states have (on average 1.7285714285714286) internal successors, (121), 69 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:20,889 INFO L93 Difference]: Finished difference Result 321 states and 331 transitions. [2022-02-15 02:00:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 02:00:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.7285714285714286) internal successors, (121), 69 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-02-15 02:00:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:20,890 INFO L225 Difference]: With dead ends: 321 [2022-02-15 02:00:20,890 INFO L226 Difference]: Without dead ends: 213 [2022-02-15 02:00:20,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5255 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3757, Invalid=15703, Unknown=0, NotChecked=0, Total=19460 [2022-02-15 02:00:20,892 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 313 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5041 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 5369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 5041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:20,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 64 Invalid, 5369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 5041 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 02:00:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-15 02:00:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-02-15 02:00:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0240384615384615) internal successors, (213), 208 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2022-02-15 02:00:20,912 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 125 [2022-02-15 02:00:20,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:20,912 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2022-02-15 02:00:20,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.7285714285714286) internal successors, (121), 69 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2022-02-15 02:00:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-15 02:00:20,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:20,913 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:20,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 02:00:20,913 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1343819126, now seen corresponding path program 39 times [2022-02-15 02:00:20,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:20,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384066768] [2022-02-15 02:00:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:20,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:20,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:20,990 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:21,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:21,046 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:21,046 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:21,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:21,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:23,265 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:23,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384066768] [2022-02-15 02:00:23,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384066768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:23,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:23,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-15 02:00:23,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822690440] [2022-02-15 02:00:23,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:23,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-15 02:00:23,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:23,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-15 02:00:23,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=5175, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:00:23,267 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 72 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 71 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:26,787 INFO L93 Difference]: Finished difference Result 324 states and 333 transitions. [2022-02-15 02:00:26,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 02:00:26,787 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 71 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-02-15 02:00:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:26,788 INFO L225 Difference]: With dead ends: 324 [2022-02-15 02:00:26,788 INFO L226 Difference]: Without dead ends: 215 [2022-02-15 02:00:26,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=629, Invalid=14871, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 02:00:26,789 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5672 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 5727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:26,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 275 Invalid, 5727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5672 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 02:00:26,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-02-15 02:00:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-02-15 02:00:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0238095238095237) internal successors, (215), 210 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 219 transitions. [2022-02-15 02:00:26,808 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 219 transitions. Word has length 128 [2022-02-15 02:00:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:26,808 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 219 transitions. [2022-02-15 02:00:26,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 71 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 219 transitions. [2022-02-15 02:00:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-02-15 02:00:26,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:26,809 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:26,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 02:00:26,809 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1290906609, now seen corresponding path program 40 times [2022-02-15 02:00:26,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:26,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616487131] [2022-02-15 02:00:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:26,876 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:26,895 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:26,895 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:26,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:26,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:26,959 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:26,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:27,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:29,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:29,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616487131] [2022-02-15 02:00:29,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616487131] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:29,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:29,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-15 02:00:29,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681645725] [2022-02-15 02:00:29,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:29,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-15 02:00:29,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-15 02:00:29,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=5322, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 02:00:29,076 INFO L87 Difference]: Start difference. First operand 215 states and 219 transitions. Second operand has 73 states, 73 states have (on average 1.726027397260274) internal successors, (126), 72 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:32,233 INFO L93 Difference]: Finished difference Result 326 states and 335 transitions. [2022-02-15 02:00:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 02:00:32,233 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.726027397260274) internal successors, (126), 72 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-02-15 02:00:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:32,234 INFO L225 Difference]: With dead ends: 326 [2022-02-15 02:00:32,234 INFO L226 Difference]: Without dead ends: 217 [2022-02-15 02:00:32,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=637, Invalid=15365, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 02:00:32,235 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 5887 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 5943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 5887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:32,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 280 Invalid, 5943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 5887 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:00:32,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-02-15 02:00:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-02-15 02:00:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 212 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2022-02-15 02:00:32,270 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 130 [2022-02-15 02:00:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:32,272 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2022-02-15 02:00:32,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.726027397260274) internal successors, (126), 72 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2022-02-15 02:00:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-15 02:00:32,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:32,273 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:32,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 02:00:32,273 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1981585324, now seen corresponding path program 41 times [2022-02-15 02:00:32,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:32,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370965891] [2022-02-15 02:00:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:32,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:32,333 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:32,333 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:32,353 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:32,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:32,388 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:32,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:32,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:34,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:34,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370965891] [2022-02-15 02:00:34,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [370965891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:34,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:34,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 02:00:34,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789549197] [2022-02-15 02:00:34,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:34,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 02:00:34,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 02:00:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4047, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 02:00:34,178 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand has 74 states, 74 states have (on average 1.7297297297297298) internal successors, (128), 73 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:38,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:38,291 INFO L93 Difference]: Finished difference Result 347 states and 375 transitions. [2022-02-15 02:00:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 02:00:38,291 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.7297297297297298) internal successors, (128), 73 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-02-15 02:00:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:38,292 INFO L225 Difference]: With dead ends: 347 [2022-02-15 02:00:38,292 INFO L226 Difference]: Without dead ends: 238 [2022-02-15 02:00:38,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5398 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4059, Invalid=16821, Unknown=0, NotChecked=0, Total=20880 [2022-02-15 02:00:38,294 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 385 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:38,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 24 Invalid, 5784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 02:00:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-02-15 02:00:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 138. [2022-02-15 02:00:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 133 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-02-15 02:00:38,317 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 132 [2022-02-15 02:00:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:38,318 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-02-15 02:00:38,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.7297297297297298) internal successors, (128), 73 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-02-15 02:00:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-15 02:00:38,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:38,318 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:38,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 02:00:38,320 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1210089979, now seen corresponding path program 42 times [2022-02-15 02:00:38,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:38,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447785972] [2022-02-15 02:00:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:38,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:38,416 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:38,417 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:38,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:38,501 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:38,501 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:38,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:38,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:40,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:40,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447785972] [2022-02-15 02:00:40,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447785972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:40,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:40,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-15 02:00:40,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396670906] [2022-02-15 02:00:40,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:40,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-15 02:00:40,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:40,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-15 02:00:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=4378, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 02:00:40,323 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 77 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 76 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:44,603 INFO L93 Difference]: Finished difference Result 273 states and 284 transitions. [2022-02-15 02:00:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 02:00:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 76 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-02-15 02:00:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:44,604 INFO L225 Difference]: With dead ends: 273 [2022-02-15 02:00:44,604 INFO L226 Difference]: Without dead ends: 143 [2022-02-15 02:00:44,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5889 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4416, Invalid=18234, Unknown=0, NotChecked=0, Total=22650 [2022-02-15 02:00:44,607 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 5838 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 6089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:44,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 54 Invalid, 6089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5838 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:00:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-15 02:00:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-02-15 02:00:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-02-15 02:00:44,626 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 137 [2022-02-15 02:00:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:44,626 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-02-15 02:00:44,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 76 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-02-15 02:00:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-02-15 02:00:44,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:44,627 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:44,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 02:00:44,627 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:44,627 INFO L85 PathProgramCache]: Analyzing trace with hash -682506424, now seen corresponding path program 43 times [2022-02-15 02:00:44,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:44,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671955490] [2022-02-15 02:00:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:44,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:44,720 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:44,721 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:44,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:44,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:44,780 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:44,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:45,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:46,741 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:46,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671955490] [2022-02-15 02:00:46,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [671955490] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:46,741 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:46,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 02:00:46,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327231099] [2022-02-15 02:00:46,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:46,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 02:00:46,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 02:00:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=6370, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 02:00:46,743 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 80 states, 80 states have (on average 1.725) internal successors, (138), 79 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:51,373 INFO L93 Difference]: Finished difference Result 388 states and 398 transitions. [2022-02-15 02:00:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 02:00:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.725) internal successors, (138), 79 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-02-15 02:00:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:51,374 INFO L225 Difference]: With dead ends: 388 [2022-02-15 02:00:51,374 INFO L226 Difference]: Without dead ends: 253 [2022-02-15 02:00:51,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3129 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=720, Invalid=18462, Unknown=0, NotChecked=0, Total=19182 [2022-02-15 02:00:51,376 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 7385 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 7447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 7385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:51,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 320 Invalid, 7447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 7385 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 02:00:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-15 02:00:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-02-15 02:00:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0201612903225807) internal successors, (253), 248 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 257 transitions. [2022-02-15 02:00:51,399 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 257 transitions. Word has length 142 [2022-02-15 02:00:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:51,399 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 257 transitions. [2022-02-15 02:00:51,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.725) internal successors, (138), 79 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 257 transitions. [2022-02-15 02:00:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-15 02:00:51,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:51,400 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:51,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 02:00:51,400 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:51,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1669751795, now seen corresponding path program 44 times [2022-02-15 02:00:51,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:51,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478785856] [2022-02-15 02:00:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:51,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:51,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:51,471 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:51,495 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:51,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:51,540 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:51,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:51,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:53,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:53,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478785856] [2022-02-15 02:00:53,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [478785856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:53,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:53,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-15 02:00:53,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854121548] [2022-02-15 02:00:53,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:53,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-15 02:00:53,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:53,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-15 02:00:53,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1679, Invalid=5293, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 02:00:53,713 INFO L87 Difference]: Start difference. First operand 253 states and 257 transitions. Second operand has 81 states, 81 states have (on average 1.728395061728395) internal successors, (140), 80 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:58,546 INFO L93 Difference]: Finished difference Result 391 states and 401 transitions. [2022-02-15 02:00:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 02:00:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.728395061728395) internal successors, (140), 80 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-02-15 02:00:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:58,547 INFO L225 Difference]: With dead ends: 391 [2022-02-15 02:00:58,548 INFO L226 Difference]: Without dead ends: 256 [2022-02-15 02:00:58,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7003 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4867, Invalid=21215, Unknown=0, NotChecked=0, Total=26082 [2022-02-15 02:00:58,550 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 475 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6635 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 7128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 6635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:58,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 29 Invalid, 7128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 6635 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 02:00:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-15 02:00:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-02-15 02:00:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0199203187250996) internal successors, (256), 251 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 260 transitions. [2022-02-15 02:00:58,573 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 260 transitions. Word has length 144 [2022-02-15 02:00:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:58,574 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 260 transitions. [2022-02-15 02:00:58,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.728395061728395) internal successors, (140), 80 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 260 transitions. [2022-02-15 02:00:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-02-15 02:00:58,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:58,574 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:58,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 02:00:58,575 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:58,575 INFO L85 PathProgramCache]: Analyzing trace with hash 722035217, now seen corresponding path program 45 times [2022-02-15 02:00:58,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:58,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76738494] [2022-02-15 02:00:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:58,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,648 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:58,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,730 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,730 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:58,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:59,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:00,916 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:00,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76738494] [2022-02-15 02:01:00,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [76738494] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:00,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:00,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-15 02:01:00,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015337758] [2022-02-15 02:01:00,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:00,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-15 02:01:00,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-15 02:01:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=5468, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 02:01:00,918 INFO L87 Difference]: Start difference. First operand 256 states and 260 transitions. Second operand has 83 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 82 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:04,453 INFO L93 Difference]: Finished difference Result 395 states and 405 transitions. [2022-02-15 02:01:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 02:01:04,453 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 82 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-02-15 02:01:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:04,454 INFO L225 Difference]: With dead ends: 395 [2022-02-15 02:01:04,454 INFO L226 Difference]: Without dead ends: 259 [2022-02-15 02:01:04,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7464 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5295, Invalid=22095, Unknown=0, NotChecked=0, Total=27390 [2022-02-15 02:01:04,455 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6825 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 7031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 6825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:04,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 29 Invalid, 7031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 6825 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:01:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-02-15 02:01:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-02-15 02:01:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0196850393700787) internal successors, (259), 254 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 263 transitions. [2022-02-15 02:01:04,481 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 263 transitions. Word has length 147 [2022-02-15 02:01:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:04,481 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 263 transitions. [2022-02-15 02:01:04,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 82 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 263 transitions. [2022-02-15 02:01:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-02-15 02:01:04,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:04,482 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:04,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 02:01:04,482 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:04,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:04,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1570402185, now seen corresponding path program 46 times [2022-02-15 02:01:04,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:04,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533036721] [2022-02-15 02:01:04,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:04,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,546 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:04,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,624 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,624 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:04,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:04,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:07,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:07,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533036721] [2022-02-15 02:01:07,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [533036721] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:07,429 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:07,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-15 02:01:07,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790580671] [2022-02-15 02:01:07,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:07,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-15 02:01:07,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-15 02:01:07,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=7164, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 02:01:07,430 INFO L87 Difference]: Start difference. First operand 259 states and 263 transitions. Second operand has 85 states, 85 states have (on average 1.7176470588235293) internal successors, (146), 84 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:12,417 INFO L93 Difference]: Finished difference Result 398 states and 407 transitions. [2022-02-15 02:01:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 02:01:12,417 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.7176470588235293) internal successors, (146), 84 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-02-15 02:01:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:12,418 INFO L225 Difference]: With dead ends: 398 [2022-02-15 02:01:12,418 INFO L226 Difference]: Without dead ends: 261 [2022-02-15 02:01:12,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3507 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=791, Invalid=20671, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 02:01:12,420 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 7874 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 7938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 7874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:12,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 325 Invalid, 7938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 7874 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:01:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-15 02:01:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-02-15 02:01:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.01953125) internal successors, (261), 256 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2022-02-15 02:01:12,445 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 150 [2022-02-15 02:01:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:12,445 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2022-02-15 02:01:12,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.7176470588235293) internal successors, (146), 84 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2022-02-15 02:01:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-15 02:01:12,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:12,446 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:12,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 02:01:12,448 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash 354603068, now seen corresponding path program 47 times [2022-02-15 02:01:12,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:12,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693735387] [2022-02-15 02:01:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:12,504 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,530 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:12,559 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,621 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:12,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:12,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:14,917 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:14,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693735387] [2022-02-15 02:01:14,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [693735387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:14,917 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:14,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-15 02:01:14,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105560177] [2022-02-15 02:01:14,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:14,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-15 02:01:14,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:14,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-15 02:01:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=5449, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 02:01:14,919 INFO L87 Difference]: Start difference. First operand 261 states and 265 transitions. Second operand has 86 states, 86 states have (on average 1.7209302325581395) internal successors, (148), 85 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:20,178 INFO L93 Difference]: Finished difference Result 411 states and 431 transitions. [2022-02-15 02:01:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-15 02:01:20,178 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.7209302325581395) internal successors, (148), 85 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-02-15 02:01:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:20,179 INFO L225 Difference]: With dead ends: 411 [2022-02-15 02:01:20,179 INFO L226 Difference]: Without dead ends: 274 [2022-02-15 02:01:20,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7488 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5577, Invalid=22815, Unknown=0, NotChecked=0, Total=28392 [2022-02-15 02:01:20,182 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7168 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 7391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 7168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:20,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 39 Invalid, 7391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 7168 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 02:01:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-02-15 02:01:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 158. [2022-02-15 02:01:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.026143790849673) internal successors, (157), 153 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-02-15 02:01:20,197 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 152 [2022-02-15 02:01:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:20,198 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-02-15 02:01:20,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.7209302325581395) internal successors, (148), 85 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-02-15 02:01:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-15 02:01:20,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:20,198 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:20,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 02:01:20,199 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:20,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:20,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1934769181, now seen corresponding path program 48 times [2022-02-15 02:01:20,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:20,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546304173] [2022-02-15 02:01:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:20,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:20,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:20,280 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:20,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:20,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:20,346 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:20,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:22,775 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:22,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546304173] [2022-02-15 02:01:22,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [546304173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:22,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:22,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-15 02:01:22,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673543332] [2022-02-15 02:01:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:22,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-15 02:01:22,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-15 02:01:22,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2055, Invalid=6317, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 02:01:22,778 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 89 states, 89 states have (on average 1.7191011235955056) internal successors, (153), 88 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:28,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:28,461 INFO L93 Difference]: Finished difference Result 431 states and 442 transitions. [2022-02-15 02:01:28,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-15 02:01:28,462 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.7191011235955056) internal successors, (153), 88 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-02-15 02:01:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:28,463 INFO L225 Difference]: With dead ends: 431 [2022-02-15 02:01:28,464 INFO L226 Difference]: Without dead ends: 281 [2022-02-15 02:01:28,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8623 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5986, Invalid=25520, Unknown=0, NotChecked=0, Total=31506 [2022-02-15 02:01:28,465 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 388 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7805 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 8214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 7805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:28,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 40 Invalid, 8214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 7805 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 02:01:28,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-15 02:01:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-02-15 02:01:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0181159420289856) internal successors, (281), 276 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 285 transitions. [2022-02-15 02:01:28,497 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 285 transitions. Word has length 157 [2022-02-15 02:01:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:28,497 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 285 transitions. [2022-02-15 02:01:28,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.7191011235955056) internal successors, (153), 88 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 285 transitions. [2022-02-15 02:01:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-15 02:01:28,499 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:28,499 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:28,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 02:01:28,499 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:28,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:28,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1321940395, now seen corresponding path program 49 times [2022-02-15 02:01:28,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:28,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253221049] [2022-02-15 02:01:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:28,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,585 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:28,602 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,649 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:28,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:28,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:30,920 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:30,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253221049] [2022-02-15 02:01:30,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253221049] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:30,920 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:30,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-15 02:01:30,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526183040] [2022-02-15 02:01:30,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:30,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-15 02:01:30,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-15 02:01:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2116, Invalid=6074, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 02:01:30,922 INFO L87 Difference]: Start difference. First operand 281 states and 285 transitions. Second operand has 91 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 90 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:36,859 INFO L93 Difference]: Finished difference Result 439 states and 453 transitions. [2022-02-15 02:01:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-15 02:01:36,859 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 90 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-02-15 02:01:36,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:36,860 INFO L225 Difference]: With dead ends: 439 [2022-02-15 02:01:36,860 INFO L226 Difference]: Without dead ends: 288 [2022-02-15 02:01:36,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8498 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6342, Invalid=25520, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 02:01:36,863 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 267 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 7910 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 7910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:36,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 54 Invalid, 8270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 7910 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 02:01:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-15 02:01:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 166. [2022-02-15 02:01:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 161 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-02-15 02:01:36,884 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 160 [2022-02-15 02:01:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:36,884 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-02-15 02:01:36,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 90 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-02-15 02:01:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-02-15 02:01:36,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:36,885 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:36,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 02:01:36,885 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:36,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1578062194, now seen corresponding path program 50 times [2022-02-15 02:01:36,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:36,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827360667] [2022-02-15 02:01:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:36,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:36,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:36,962 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:36,988 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:37,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:37,034 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:37,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:39,700 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:39,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827360667] [2022-02-15 02:01:39,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [827360667] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:39,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:39,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-15 02:01:39,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877158547] [2022-02-15 02:01:39,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:39,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-15 02:01:39,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:39,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-15 02:01:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2386, Invalid=6926, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 02:01:39,703 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 94 states, 94 states have (on average 1.7127659574468086) internal successors, (161), 93 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:44,443 INFO L93 Difference]: Finished difference Result 453 states and 464 transitions. [2022-02-15 02:01:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-15 02:01:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.7127659574468086) internal successors, (161), 93 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-02-15 02:01:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:44,444 INFO L225 Difference]: With dead ends: 453 [2022-02-15 02:01:44,445 INFO L226 Difference]: Without dead ends: 295 [2022-02-15 02:01:44,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9699 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6905, Invalid=28251, Unknown=0, NotChecked=0, Total=35156 [2022-02-15 02:01:44,447 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 343 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 8590 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 8958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 8590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:44,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 85 Invalid, 8958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 8590 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 02:01:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-15 02:01:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-02-15 02:01:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.0172413793103448) internal successors, (295), 290 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 299 transitions. [2022-02-15 02:01:44,499 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 299 transitions. Word has length 165 [2022-02-15 02:01:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:44,499 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 299 transitions. [2022-02-15 02:01:44,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.7127659574468086) internal successors, (161), 93 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 299 transitions. [2022-02-15 02:01:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-15 02:01:44,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:44,500 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:44,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 02:01:44,500 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash -681935782, now seen corresponding path program 51 times [2022-02-15 02:01:44,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:44,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834220850] [2022-02-15 02:01:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:44,560 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:44,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:44,573 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:44,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:44,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:44,620 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:44,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:45,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:48,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:48,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834220850] [2022-02-15 02:01:48,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1834220850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:48,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:48,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-15 02:01:48,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377400400] [2022-02-15 02:01:48,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:48,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-15 02:01:48,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:48,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-15 02:01:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=9083, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 02:01:48,048 INFO L87 Difference]: Start difference. First operand 295 states and 299 transitions. Second operand has 96 states, 96 states have (on average 1.7083333333333333) internal successors, (164), 95 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:54,031 INFO L93 Difference]: Finished difference Result 456 states and 465 transitions. [2022-02-15 02:01:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 02:01:54,031 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.7083333333333333) internal successors, (164), 95 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-02-15 02:01:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:54,032 INFO L225 Difference]: With dead ends: 456 [2022-02-15 02:01:54,032 INFO L226 Difference]: Without dead ends: 297 [2022-02-15 02:01:54,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4424 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=953, Invalid=26107, Unknown=0, NotChecked=0, Total=27060 [2022-02-15 02:01:54,034 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 10152 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 10223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 10152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:54,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 375 Invalid, 10223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 10152 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-15 02:01:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-15 02:01:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2022-02-15 02:01:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0171232876712328) internal successors, (297), 292 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 301 transitions. [2022-02-15 02:01:54,089 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 301 transitions. Word has length 168 [2022-02-15 02:01:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:54,090 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 301 transitions. [2022-02-15 02:01:54,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.7083333333333333) internal successors, (164), 95 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 301 transitions. [2022-02-15 02:01:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-02-15 02:01:54,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:54,092 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:54,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 02:01:54,092 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash 654521567, now seen corresponding path program 52 times [2022-02-15 02:01:54,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:54,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438695830] [2022-02-15 02:01:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:54,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:54,165 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:54,165 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:54,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:54,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:54,245 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:54,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:56,797 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:56,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438695830] [2022-02-15 02:01:56,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438695830] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:56,797 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:56,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-15 02:01:56,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117957889] [2022-02-15 02:01:56,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:56,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-15 02:01:56,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-15 02:01:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=9278, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 02:01:56,800 INFO L87 Difference]: Start difference. First operand 297 states and 301 transitions. Second operand has 97 states, 97 states have (on average 1.711340206185567) internal successors, (166), 96 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:03,327 INFO L93 Difference]: Finished difference Result 458 states and 467 transitions. [2022-02-15 02:02:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 02:02:03,328 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.711340206185567) internal successors, (166), 96 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-02-15 02:02:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:03,328 INFO L225 Difference]: With dead ends: 458 [2022-02-15 02:02:03,328 INFO L226 Difference]: Without dead ends: 299 [2022-02-15 02:02:03,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4523 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=961, Invalid=26761, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 02:02:03,330 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 10157 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 10229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 10157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:03,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 370 Invalid, 10229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 10157 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 02:02:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-15 02:02:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-02-15 02:02:03,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0170068027210883) internal successors, (299), 294 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2022-02-15 02:02:03,399 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 170 [2022-02-15 02:02:03,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:03,399 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2022-02-15 02:02:03,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.711340206185567) internal successors, (166), 96 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:03,400 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2022-02-15 02:02:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-02-15 02:02:03,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:03,411 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:03,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 02:02:03,412 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:03,412 INFO L85 PathProgramCache]: Analyzing trace with hash 794812452, now seen corresponding path program 53 times [2022-02-15 02:02:03,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:03,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229845418] [2022-02-15 02:02:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:03,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:03,477 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:03,477 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:03,501 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:03,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:03,548 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:03,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:04,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:06,484 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:06,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229845418] [2022-02-15 02:02:06,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [229845418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:06,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:06,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-15 02:02:06,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268173414] [2022-02-15 02:02:06,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:06,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-15 02:02:06,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-15 02:02:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2447, Invalid=7059, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 02:02:06,486 INFO L87 Difference]: Start difference. First operand 299 states and 303 transitions. Second operand has 98 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 97 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:12,300 INFO L93 Difference]: Finished difference Result 469 states and 487 transitions. [2022-02-15 02:02:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-15 02:02:12,300 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 97 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-02-15 02:02:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:12,301 INFO L225 Difference]: With dead ends: 469 [2022-02-15 02:02:12,301 INFO L226 Difference]: Without dead ends: 310 [2022-02-15 02:02:12,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9914 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7335, Invalid=29721, Unknown=0, NotChecked=0, Total=37056 [2022-02-15 02:02:12,325 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 357 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9187 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 9187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:12,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 39 Invalid, 9508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 9187 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:02:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-15 02:02:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 178. [2022-02-15 02:02:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.023121387283237) internal successors, (177), 173 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2022-02-15 02:02:12,362 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 172 [2022-02-15 02:02:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:12,362 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2022-02-15 02:02:12,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 97 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2022-02-15 02:02:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-02-15 02:02:12,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:12,363 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:12,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 02:02:12,363 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash -363998667, now seen corresponding path program 54 times [2022-02-15 02:02:12,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:12,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005827553] [2022-02-15 02:02:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:12,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:12,461 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:12,461 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:12,487 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:12,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:12,566 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:12,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:13,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:15,306 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:15,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005827553] [2022-02-15 02:02:15,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1005827553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:15,306 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:15,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-15 02:02:15,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374857489] [2022-02-15 02:02:15,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:15,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-15 02:02:15,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-15 02:02:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2606, Invalid=7494, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 02:02:15,308 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand has 101 states, 101 states have (on average 1.7128712871287128) internal successors, (173), 100 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:20,487 INFO L93 Difference]: Finished difference Result 353 states and 364 transitions. [2022-02-15 02:02:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-15 02:02:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.7128712871287128) internal successors, (173), 100 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-02-15 02:02:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:20,488 INFO L225 Difference]: With dead ends: 353 [2022-02-15 02:02:20,488 INFO L226 Difference]: Without dead ends: 183 [2022-02-15 02:02:20,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10573 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7812, Invalid=31590, Unknown=0, NotChecked=0, Total=39402 [2022-02-15 02:02:20,492 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 367 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 9781 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 9781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:20,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 54 Invalid, 10180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 9781 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 02:02:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-15 02:02:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-02-15 02:02:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-02-15 02:02:20,542 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 177 [2022-02-15 02:02:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:20,542 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-02-15 02:02:20,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.7128712871287128) internal successors, (173), 100 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-02-15 02:02:20,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-15 02:02:20,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:20,543 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:20,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 02:02:20,544 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash 619013912, now seen corresponding path program 55 times [2022-02-15 02:02:20,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:20,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81992577] [2022-02-15 02:02:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:20,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:20,616 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:20,616 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:20,633 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:20,687 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:20,687 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:20,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:21,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:24,285 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:24,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81992577] [2022-02-15 02:02:24,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [81992577] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:24,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:24,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-15 02:02:24,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565440114] [2022-02-15 02:02:24,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:24,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-15 02:02:24,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:24,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-15 02:02:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=10646, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 02:02:24,287 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 104 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 103 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:29,556 INFO L93 Difference]: Finished difference Result 500 states and 510 transitions. [2022-02-15 02:02:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 02:02:29,558 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 103 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-02-15 02:02:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:29,559 INFO L225 Difference]: With dead ends: 500 [2022-02-15 02:02:29,559 INFO L226 Difference]: Without dead ends: 325 [2022-02-15 02:02:29,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5185 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1060, Invalid=30802, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 02:02:29,561 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 11173 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 11251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 11173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:29,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 380 Invalid, 11251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 11173 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 02:02:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-15 02:02:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2022-02-15 02:02:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.015625) internal successors, (325), 320 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 329 transitions. [2022-02-15 02:02:29,601 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 329 transitions. Word has length 182 [2022-02-15 02:02:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:29,602 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 329 transitions. [2022-02-15 02:02:29,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 103 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 329 transitions. [2022-02-15 02:02:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-02-15 02:02:29,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:29,603 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:29,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 02:02:29,603 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:29,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1374311133, now seen corresponding path program 56 times [2022-02-15 02:02:29,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:29,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465403556] [2022-02-15 02:02:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:29,652 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:29,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:29,672 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:29,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:29,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:29,749 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:29,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:30,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:33,747 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:33,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465403556] [2022-02-15 02:02:33,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [465403556] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:33,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:33,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-15 02:02:33,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351615580] [2022-02-15 02:02:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:33,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-15 02:02:33,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-15 02:02:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=10857, Unknown=0, NotChecked=0, Total=11556 [2022-02-15 02:02:33,749 INFO L87 Difference]: Start difference. First operand 325 states and 329 transitions. Second operand has 105 states, 105 states have (on average 1.7142857142857142) internal successors, (180), 104 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:41,261 INFO L93 Difference]: Finished difference Result 502 states and 511 transitions. [2022-02-15 02:02:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 02:02:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.7142857142857142) internal successors, (180), 104 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-02-15 02:02:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:41,263 INFO L225 Difference]: With dead ends: 502 [2022-02-15 02:02:41,263 INFO L226 Difference]: Without dead ends: 327 [2022-02-15 02:02:41,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5292 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1068, Invalid=31512, Unknown=0, NotChecked=0, Total=32580 [2022-02-15 02:02:41,264 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 12249 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 12327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 12249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:41,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 410 Invalid, 12327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 12249 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 02:02:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-15 02:02:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2022-02-15 02:02:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.015527950310559) internal successors, (327), 322 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 331 transitions. [2022-02-15 02:02:41,303 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 331 transitions. Word has length 184 [2022-02-15 02:02:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:41,303 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 331 transitions. [2022-02-15 02:02:41,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.7142857142857142) internal successors, (180), 104 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:41,303 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 331 transitions. [2022-02-15 02:02:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-02-15 02:02:41,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:41,304 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:41,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 02:02:41,304 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:41,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1365467490, now seen corresponding path program 57 times [2022-02-15 02:02:41,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:41,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566210790] [2022-02-15 02:02:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:41,365 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:41,391 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:41,391 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:41,416 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:41,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:41,475 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:41,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:42,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:45,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:45,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566210790] [2022-02-15 02:02:45,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [566210790] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:45,565 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:45,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-15 02:02:45,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455079457] [2022-02-15 02:02:45,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:45,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-15 02:02:45,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-15 02:02:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=11070, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 02:02:45,566 INFO L87 Difference]: Start difference. First operand 327 states and 331 transitions. Second operand has 106 states, 106 states have (on average 1.7169811320754718) internal successors, (182), 105 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:53,089 INFO L93 Difference]: Finished difference Result 504 states and 513 transitions. [2022-02-15 02:02:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 02:02:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.7169811320754718) internal successors, (182), 105 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-02-15 02:02:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:53,091 INFO L225 Difference]: With dead ends: 504 [2022-02-15 02:02:53,091 INFO L226 Difference]: Without dead ends: 329 [2022-02-15 02:02:53,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5400 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1076, Invalid=32230, Unknown=0, NotChecked=0, Total=33306 [2022-02-15 02:02:53,093 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 12246 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 12325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 12246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:53,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 405 Invalid, 12325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 12246 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 02:02:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-15 02:02:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-02-15 02:02:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 324 states have (on average 1.0154320987654322) internal successors, (329), 324 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 333 transitions. [2022-02-15 02:02:53,132 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 333 transitions. Word has length 186 [2022-02-15 02:02:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:53,132 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 333 transitions. [2022-02-15 02:02:53,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.7169811320754718) internal successors, (182), 105 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 333 transitions. [2022-02-15 02:02:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-02-15 02:02:53,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:53,133 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:53,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 02:02:53,133 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:53,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1456661159, now seen corresponding path program 58 times [2022-02-15 02:02:53,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:53,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165303873] [2022-02-15 02:02:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:53,186 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:53,208 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:53,208 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:53,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:53,296 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:53,297 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:53,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:53,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:57,427 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:57,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165303873] [2022-02-15 02:02:57,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1165303873] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:57,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:57,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-15 02:02:57,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104875834] [2022-02-15 02:02:57,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:57,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-15 02:02:57,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-15 02:02:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=11285, Unknown=0, NotChecked=0, Total=11990 [2022-02-15 02:02:57,430 INFO L87 Difference]: Start difference. First operand 329 states and 333 transitions. Second operand has 107 states, 107 states have (on average 1.719626168224299) internal successors, (184), 106 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:04,199 INFO L93 Difference]: Finished difference Result 506 states and 515 transitions. [2022-02-15 02:03:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 02:03:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.719626168224299) internal successors, (184), 106 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-02-15 02:03:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:04,200 INFO L225 Difference]: With dead ends: 506 [2022-02-15 02:03:04,200 INFO L226 Difference]: Without dead ends: 331 [2022-02-15 02:03:04,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1084, Invalid=32956, Unknown=0, NotChecked=0, Total=34040 [2022-02-15 02:03:04,202 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 12565 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 12645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 12565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:04,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 410 Invalid, 12645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 12565 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-15 02:03:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-15 02:03:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-02-15 02:03:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0153374233128833) internal successors, (331), 326 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 335 transitions. [2022-02-15 02:03:04,239 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 335 transitions. Word has length 188 [2022-02-15 02:03:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:04,240 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 335 transitions. [2022-02-15 02:03:04,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.719626168224299) internal successors, (184), 106 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 335 transitions. [2022-02-15 02:03:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-02-15 02:03:04,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:04,240 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:04,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 02:03:04,241 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:04,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1100536148, now seen corresponding path program 59 times [2022-02-15 02:03:04,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:04,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11918606] [2022-02-15 02:03:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:04,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:04,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:04,313 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:04,331 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:04,389 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:04,389 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:04,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:04,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:07,870 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:07,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11918606] [2022-02-15 02:03:07,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [11918606] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:07,870 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:07,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-15 02:03:07,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450240226] [2022-02-15 02:03:07,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:07,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-15 02:03:07,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:07,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-15 02:03:07,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=11502, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 02:03:07,871 INFO L87 Difference]: Start difference. First operand 331 states and 335 transitions. Second operand has 108 states, 108 states have (on average 1.7222222222222223) internal successors, (186), 107 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:15,573 INFO L93 Difference]: Finished difference Result 508 states and 517 transitions. [2022-02-15 02:03:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 02:03:15,574 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.7222222222222223) internal successors, (186), 107 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-02-15 02:03:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:15,575 INFO L225 Difference]: With dead ends: 508 [2022-02-15 02:03:15,575 INFO L226 Difference]: Without dead ends: 333 [2022-02-15 02:03:15,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5619 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1092, Invalid=33690, Unknown=0, NotChecked=0, Total=34782 [2022-02-15 02:03:15,577 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12401 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 12482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 12401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:15,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 400 Invalid, 12482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 12401 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 02:03:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-02-15 02:03:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-02-15 02:03:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.0152439024390243) internal successors, (333), 328 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 337 transitions. [2022-02-15 02:03:15,623 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 337 transitions. Word has length 190 [2022-02-15 02:03:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:15,623 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 337 transitions. [2022-02-15 02:03:15,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.7222222222222223) internal successors, (186), 107 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 337 transitions. [2022-02-15 02:03:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-02-15 02:03:15,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:15,624 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:15,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 02:03:15,624 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:15,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1845854863, now seen corresponding path program 60 times [2022-02-15 02:03:15,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:15,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064604645] [2022-02-15 02:03:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:15,670 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:15,683 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:15,683 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:15,701 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:15,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:15,747 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:15,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:16,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:19,106 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:19,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064604645] [2022-02-15 02:03:19,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064604645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:19,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:19,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-02-15 02:03:19,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244148353] [2022-02-15 02:03:19,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:19,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-02-15 02:03:19,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-02-15 02:03:19,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=8842, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 02:03:19,109 INFO L87 Difference]: Start difference. First operand 333 states and 337 transitions. Second operand has 109 states, 109 states have (on average 1.724770642201835) internal successors, (188), 108 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:25,324 INFO L93 Difference]: Finished difference Result 523 states and 545 transitions. [2022-02-15 02:03:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-15 02:03:25,324 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.724770642201835) internal successors, (188), 108 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-02-15 02:03:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:25,325 INFO L225 Difference]: With dead ends: 523 [2022-02-15 02:03:25,325 INFO L226 Difference]: Without dead ends: 348 [2022-02-15 02:03:25,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12193 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8784, Invalid=37226, Unknown=0, NotChecked=0, Total=46010 [2022-02-15 02:03:25,328 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 480 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 11815 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 12334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 11815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:25,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 49 Invalid, 12334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 11815 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 02:03:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-15 02:03:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 198. [2022-02-15 02:03:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 193 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 201 transitions. [2022-02-15 02:03:25,350 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 201 transitions. Word has length 192 [2022-02-15 02:03:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:25,350 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 201 transitions. [2022-02-15 02:03:25,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.724770642201835) internal successors, (188), 108 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:25,351 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 201 transitions. [2022-02-15 02:03:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-02-15 02:03:25,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:25,352 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:25,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 02:03:25,353 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:25,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2007959432, now seen corresponding path program 61 times [2022-02-15 02:03:25,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:25,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134158757] [2022-02-15 02:03:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:25,395 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:25,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:25,414 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:25,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:25,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:25,485 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:25,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:26,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:28,891 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:28,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134158757] [2022-02-15 02:03:28,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134158757] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:28,892 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:28,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-15 02:03:28,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354183872] [2022-02-15 02:03:28,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:28,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-15 02:03:28,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:28,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-15 02:03:28,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=12362, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 02:03:28,893 INFO L87 Difference]: Start difference. First operand 198 states and 201 transitions. Second operand has 112 states, 112 states have (on average 1.7232142857142858) internal successors, (193), 111 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:35,407 INFO L93 Difference]: Finished difference Result 544 states and 554 transitions. [2022-02-15 02:03:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 02:03:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.7232142857142858) internal successors, (193), 111 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-02-15 02:03:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:35,416 INFO L225 Difference]: With dead ends: 544 [2022-02-15 02:03:35,416 INFO L226 Difference]: Without dead ends: 354 [2022-02-15 02:03:35,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6038 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1147, Invalid=36295, Unknown=0, NotChecked=0, Total=37442 [2022-02-15 02:03:35,418 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 14533 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 14618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 14533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:35,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 450 Invalid, 14618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 14533 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 02:03:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-02-15 02:03:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-02-15 02:03:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 349 states have (on average 1.0143266475644699) internal successors, (354), 349 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 358 transitions. [2022-02-15 02:03:35,482 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 358 transitions. Word has length 197 [2022-02-15 02:03:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:35,483 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 358 transitions. [2022-02-15 02:03:35,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.7232142857142858) internal successors, (193), 111 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 358 transitions. [2022-02-15 02:03:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-02-15 02:03:35,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:35,484 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:35,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 02:03:35,484 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:35,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1642694365, now seen corresponding path program 62 times [2022-02-15 02:03:35,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:35,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341449098] [2022-02-15 02:03:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:35,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:35,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:35,532 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:35,543 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:35,584 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:35,585 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:36,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:38,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:38,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341449098] [2022-02-15 02:03:38,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341449098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:38,358 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:38,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-15 02:03:38,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048565899] [2022-02-15 02:03:38,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:38,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-15 02:03:38,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:38,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-15 02:03:38,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3204, Invalid=10136, Unknown=0, NotChecked=0, Total=13340 [2022-02-15 02:03:38,360 INFO L87 Difference]: Start difference. First operand 354 states and 358 transitions. Second operand has 113 states, 113 states have (on average 1.7256637168141593) internal successors, (195), 112 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:44,293 INFO L93 Difference]: Finished difference Result 547 states and 557 transitions. [2022-02-15 02:03:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-15 02:03:44,293 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.7256637168141593) internal successors, (195), 112 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-02-15 02:03:44,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:44,294 INFO L225 Difference]: With dead ends: 547 [2022-02-15 02:03:44,294 INFO L226 Difference]: Without dead ends: 357 [2022-02-15 02:03:44,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13843 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9391, Invalid=41459, Unknown=0, NotChecked=0, Total=50850 [2022-02-15 02:03:44,296 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 417 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12724 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 13168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 12724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:44,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 50 Invalid, 13168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 12724 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 02:03:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-02-15 02:03:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2022-02-15 02:03:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.0142045454545454) internal successors, (357), 352 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 361 transitions. [2022-02-15 02:03:44,336 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 361 transitions. Word has length 199 [2022-02-15 02:03:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:44,336 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 361 transitions. [2022-02-15 02:03:44,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.7256637168141593) internal successors, (195), 112 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 361 transitions. [2022-02-15 02:03:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-02-15 02:03:44,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:44,337 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:44,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 02:03:44,337 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1186222885, now seen corresponding path program 63 times [2022-02-15 02:03:44,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:44,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336150811] [2022-02-15 02:03:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:44,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:44,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:44,412 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:44,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:44,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:44,486 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:44,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:44,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:47,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:47,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336150811] [2022-02-15 02:03:47,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336150811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:47,109 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:47,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-02-15 02:03:47,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956795886] [2022-02-15 02:03:47,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:47,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-15 02:03:47,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:47,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-15 02:03:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3283, Invalid=9827, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 02:03:47,113 INFO L87 Difference]: Start difference. First operand 357 states and 361 transitions. Second operand has 115 states, 115 states have (on average 1.7217391304347827) internal successors, (198), 114 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:53,149 INFO L93 Difference]: Finished difference Result 557 states and 573 transitions. [2022-02-15 02:03:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-15 02:03:53,149 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.7217391304347827) internal successors, (198), 114 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-02-15 02:03:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:53,150 INFO L225 Difference]: With dead ends: 557 [2022-02-15 02:03:53,150 INFO L226 Difference]: Without dead ends: 366 [2022-02-15 02:03:53,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13676 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9843, Invalid=41459, Unknown=0, NotChecked=0, Total=51302 [2022-02-15 02:03:53,153 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 421 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 13142 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 13142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:53,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 39 Invalid, 13682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 13142 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 02:03:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-02-15 02:03:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 208. [2022-02-15 02:03:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.019704433497537) internal successors, (207), 203 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2022-02-15 02:03:53,194 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 202 [2022-02-15 02:03:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:53,194 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2022-02-15 02:03:53,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.7217391304347827) internal successors, (198), 114 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2022-02-15 02:03:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-02-15 02:03:53,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:53,195 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:53,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 02:03:53,195 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:53,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2139190060, now seen corresponding path program 64 times [2022-02-15 02:03:53,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:53,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839133807] [2022-02-15 02:03:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:53,251 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:53,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:53,268 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:53,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:53,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:53,370 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:53,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:53,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:56,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:56,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839133807] [2022-02-15 02:03:56,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [839133807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:56,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:56,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-02-15 02:03:56,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004112572] [2022-02-15 02:03:56,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:56,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-02-15 02:03:56,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:56,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-02-15 02:03:56,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3627, Invalid=10893, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 02:03:56,248 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 118 states, 118 states have (on average 1.7203389830508475) internal successors, (203), 117 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:03,824 INFO L93 Difference]: Finished difference Result 573 states and 584 transitions. [2022-02-15 02:04:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-02-15 02:04:03,824 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.7203389830508475) internal successors, (203), 117 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-02-15 02:04:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:03,825 INFO L225 Difference]: With dead ends: 573 [2022-02-15 02:04:03,825 INFO L226 Difference]: Without dead ends: 373 [2022-02-15 02:04:03,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15209 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10560, Invalid=44900, Unknown=0, NotChecked=0, Total=55460 [2022-02-15 02:04:03,828 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 262 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13920 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 14212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 13920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:03,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 34 Invalid, 14212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 13920 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-15 02:04:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-02-15 02:04:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2022-02-15 02:04:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 368 states have (on average 1.013586956521739) internal successors, (373), 368 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 377 transitions. [2022-02-15 02:04:03,872 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 377 transitions. Word has length 207 [2022-02-15 02:04:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:03,873 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 377 transitions. [2022-02-15 02:04:03,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.7203389830508475) internal successors, (203), 117 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 377 transitions. [2022-02-15 02:04:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-02-15 02:04:03,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:03,873 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:03,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 02:04:03,874 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1194877076, now seen corresponding path program 65 times [2022-02-15 02:04:03,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:03,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798228941] [2022-02-15 02:04:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:03,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:03,942 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:03,942 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:03,968 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:04,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:04,025 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:04,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:04,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:06,734 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:06,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798228941] [2022-02-15 02:04:06,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1798228941] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:06,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:06,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-15 02:04:06,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068984838] [2022-02-15 02:04:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:06,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-15 02:04:06,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-15 02:04:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3620, Invalid=10660, Unknown=0, NotChecked=0, Total=14280 [2022-02-15 02:04:06,736 INFO L87 Difference]: Start difference. First operand 373 states and 377 transitions. Second operand has 120 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 119 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:13,391 INFO L93 Difference]: Finished difference Result 581 states and 595 transitions. [2022-02-15 02:04:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-15 02:04:13,392 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 119 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-02-15 02:04:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:13,393 INFO L225 Difference]: With dead ends: 581 [2022-02-15 02:04:13,393 INFO L226 Difference]: Without dead ends: 380 [2022-02-15 02:04:13,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15029 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10854, Invalid=45078, Unknown=0, NotChecked=0, Total=55932 [2022-02-15 02:04:13,397 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 436 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14078 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 14380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 14078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:13,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 64 Invalid, 14380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 14078 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 02:04:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-15 02:04:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 216. [2022-02-15 02:04:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.018957345971564) internal successors, (215), 211 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-02-15 02:04:13,434 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 210 [2022-02-15 02:04:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:13,434 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-02-15 02:04:13,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 119 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-02-15 02:04:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-02-15 02:04:13,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:13,435 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:13,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 02:04:13,435 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:13,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:13,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1810376891, now seen corresponding path program 66 times [2022-02-15 02:04:13,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:13,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679275610] [2022-02-15 02:04:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:13,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:13,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:13,489 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:13,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:13,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:13,564 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:13,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:14,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:17,495 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:17,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679275610] [2022-02-15 02:04:17,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [679275610] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:17,495 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:17,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-02-15 02:04:17,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270571523] [2022-02-15 02:04:17,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:17,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-02-15 02:04:17,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:17,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-02-15 02:04:17,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3980, Invalid=11770, Unknown=0, NotChecked=0, Total=15750 [2022-02-15 02:04:17,497 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand has 123 states, 123 states have (on average 1.7154471544715446) internal successors, (211), 122 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:27,465 INFO L93 Difference]: Finished difference Result 595 states and 606 transitions. [2022-02-15 02:04:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-15 02:04:27,466 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.7154471544715446) internal successors, (211), 122 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-02-15 02:04:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:27,467 INFO L225 Difference]: With dead ends: 595 [2022-02-15 02:04:27,467 INFO L226 Difference]: Without dead ends: 387 [2022-02-15 02:04:27,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16628 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=11605, Invalid=48665, Unknown=0, NotChecked=0, Total=60270 [2022-02-15 02:04:27,469 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 623 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15165 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 15165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:27,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 34 Invalid, 15819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 15165 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-15 02:04:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-15 02:04:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-02-15 02:04:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 382 states have (on average 1.013089005235602) internal successors, (387), 382 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 391 transitions. [2022-02-15 02:04:27,520 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 391 transitions. Word has length 215 [2022-02-15 02:04:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:27,520 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 391 transitions. [2022-02-15 02:04:27,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.7154471544715446) internal successors, (211), 122 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 391 transitions. [2022-02-15 02:04:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-02-15 02:04:27,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:27,525 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:27,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 02:04:27,525 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash -103346365, now seen corresponding path program 67 times [2022-02-15 02:04:27,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:27,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782515151] [2022-02-15 02:04:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:27,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:27,601 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:27,601 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:27,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:27,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:27,667 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:28,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:31,376 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:31,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782515151] [2022-02-15 02:04:31,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [782515151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:31,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:31,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-02-15 02:04:31,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738070257] [2022-02-15 02:04:31,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:31,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-02-15 02:04:31,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-02-15 02:04:31,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3973, Invalid=11527, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 02:04:31,378 INFO L87 Difference]: Start difference. First operand 387 states and 391 transitions. Second operand has 125 states, 125 states have (on average 1.712) internal successors, (214), 124 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:41,445 INFO L93 Difference]: Finished difference Result 603 states and 617 transitions. [2022-02-15 02:04:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-02-15 02:04:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.712) internal successors, (214), 124 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2022-02-15 02:04:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:41,447 INFO L225 Difference]: With dead ends: 603 [2022-02-15 02:04:41,447 INFO L226 Difference]: Without dead ends: 394 [2022-02-15 02:04:41,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16443 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=11913, Invalid=48849, Unknown=0, NotChecked=0, Total=60762 [2022-02-15 02:04:41,450 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 541 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15138 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 15808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 15138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:41,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 49 Invalid, 15808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 15138 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-15 02:04:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-02-15 02:04:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 224. [2022-02-15 02:04:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0182648401826484) internal successors, (223), 219 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 227 transitions. [2022-02-15 02:04:41,479 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 227 transitions. Word has length 218 [2022-02-15 02:04:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:41,480 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 227 transitions. [2022-02-15 02:04:41,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.712) internal successors, (214), 124 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:41,480 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 227 transitions. [2022-02-15 02:04:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-02-15 02:04:41,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:41,481 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:41,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 02:04:41,481 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash -543119242, now seen corresponding path program 68 times [2022-02-15 02:04:41,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:41,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084625335] [2022-02-15 02:04:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:41,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:41,536 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:41,537 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:41,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:41,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:41,590 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:41,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:44,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:44,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084625335] [2022-02-15 02:04:44,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2084625335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:44,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:44,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-02-15 02:04:44,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491092069] [2022-02-15 02:04:44,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:44,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-02-15 02:04:44,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-02-15 02:04:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4254, Invalid=12776, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 02:04:44,693 INFO L87 Difference]: Start difference. First operand 224 states and 227 transitions. Second operand has 128 states, 128 states have (on average 1.7109375) internal successors, (219), 127 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:52,169 INFO L93 Difference]: Finished difference Result 617 states and 628 transitions. [2022-02-15 02:04:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-15 02:04:52,169 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.7109375) internal successors, (219), 127 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-02-15 02:04:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:52,170 INFO L225 Difference]: With dead ends: 617 [2022-02-15 02:04:52,170 INFO L226 Difference]: Without dead ends: 401 [2022-02-15 02:04:52,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18100 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=12508, Invalid=52772, Unknown=0, NotChecked=0, Total=65280 [2022-02-15 02:04:52,173 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 370 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 15797 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 16200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 15797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:52,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 60 Invalid, 16200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 15797 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 02:04:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-15 02:04:52,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-02-15 02:04:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.0126262626262625) internal successors, (401), 396 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 405 transitions. [2022-02-15 02:04:52,230 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 405 transitions. Word has length 223 [2022-02-15 02:04:52,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:52,230 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 405 transitions. [2022-02-15 02:04:52,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.7109375) internal successors, (219), 127 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 405 transitions. [2022-02-15 02:04:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-02-15 02:04:52,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:52,231 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:52,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 02:04:52,231 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash 983306034, now seen corresponding path program 69 times [2022-02-15 02:04:52,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:52,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943700866] [2022-02-15 02:04:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:52,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:52,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:52,280 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:52,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:52,349 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:52,349 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:52,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:52,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:56,263 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:56,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943700866] [2022-02-15 02:04:56,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1943700866] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:56,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:56,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-02-15 02:04:56,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446802749] [2022-02-15 02:04:56,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:56,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-02-15 02:04:56,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-02-15 02:04:56,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=16530, Unknown=0, NotChecked=0, Total=17556 [2022-02-15 02:04:56,265 INFO L87 Difference]: Start difference. First operand 401 states and 405 transitions. Second operand has 130 states, 130 states have (on average 1.7076923076923076) internal successors, (222), 129 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:03,662 INFO L93 Difference]: Finished difference Result 620 states and 629 transitions. [2022-02-15 02:05:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-15 02:05:03,662 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.7076923076923076) internal successors, (222), 129 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-02-15 02:05:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:03,663 INFO L225 Difference]: With dead ends: 620 [2022-02-15 02:05:03,663 INFO L226 Difference]: Without dead ends: 403 [2022-02-15 02:05:03,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8016 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1480, Invalid=48026, Unknown=0, NotChecked=0, Total=49506 [2022-02-15 02:05:03,670 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 18144 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 18239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 18144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:03,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 495 Invalid, 18239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 18144 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-15 02:05:03,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-15 02:05:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2022-02-15 02:05:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 398 states have (on average 1.0125628140703518) internal successors, (403), 398 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 407 transitions. [2022-02-15 02:05:03,730 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 407 transitions. Word has length 226 [2022-02-15 02:05:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:03,730 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 407 transitions. [2022-02-15 02:05:03,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.7076923076923076) internal successors, (222), 129 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:03,731 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 407 transitions. [2022-02-15 02:05:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-02-15 02:05:03,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:03,731 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:03,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 02:05:03,731 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:03,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2115885193, now seen corresponding path program 70 times [2022-02-15 02:05:03,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:03,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380903334] [2022-02-15 02:05:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:03,767 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:03,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:03,779 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:03,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:03,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:03,822 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:03,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:04,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:07,668 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:07,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380903334] [2022-02-15 02:05:07,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [380903334] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:07,668 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:07,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-02-15 02:05:07,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612582384] [2022-02-15 02:05:07,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:07,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-02-15 02:05:07,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:07,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-02-15 02:05:07,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4382, Invalid=12648, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 02:05:07,671 INFO L87 Difference]: Start difference. First operand 403 states and 407 transitions. Second operand has 131 states, 131 states have (on average 1.7099236641221374) internal successors, (224), 130 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:16,129 INFO L93 Difference]: Finished difference Result 629 states and 645 transitions. [2022-02-15 02:05:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-15 02:05:16,129 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.7099236641221374) internal successors, (224), 130 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 228 [2022-02-15 02:05:16,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:16,130 INFO L225 Difference]: With dead ends: 629 [2022-02-15 02:05:16,130 INFO L226 Difference]: Without dead ends: 412 [2022-02-15 02:05:16,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18154 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=13140, Invalid=53682, Unknown=0, NotChecked=0, Total=66822 [2022-02-15 02:05:16,132 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 379 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 16556 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 16556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:16,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 74 Invalid, 17068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 16556 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 02:05:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-02-15 02:05:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 234. [2022-02-15 02:05:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.017467248908297) internal successors, (233), 229 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 237 transitions. [2022-02-15 02:05:16,164 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 237 transitions. Word has length 228 [2022-02-15 02:05:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:16,164 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 237 transitions. [2022-02-15 02:05:16,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.7099236641221374) internal successors, (224), 130 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 237 transitions. [2022-02-15 02:05:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-02-15 02:05:16,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:16,165 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:16,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 02:05:16,165 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1324704958, now seen corresponding path program 71 times [2022-02-15 02:05:16,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:16,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815663545] [2022-02-15 02:05:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:16,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:16,225 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:16,225 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:16,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:16,284 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:16,284 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:16,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:16,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:20,311 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:20,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815663545] [2022-02-15 02:05:20,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [815663545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:20,311 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:20,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-15 02:05:20,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585850226] [2022-02-15 02:05:20,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:20,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-15 02:05:20,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-15 02:05:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1074, Invalid=17558, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 02:05:20,313 INFO L87 Difference]: Start difference. First operand 234 states and 237 transitions. Second operand has 134 states, 134 states have (on average 1.708955223880597) internal successors, (229), 133 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:28,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:28,179 INFO L93 Difference]: Finished difference Result 644 states and 654 transitions. [2022-02-15 02:05:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 02:05:28,180 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.708955223880597) internal successors, (229), 133 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-02-15 02:05:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:28,181 INFO L225 Difference]: With dead ends: 644 [2022-02-15 02:05:28,181 INFO L226 Difference]: Without dead ends: 418 [2022-02-15 02:05:28,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8515 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1543, Invalid=51127, Unknown=0, NotChecked=0, Total=52670 [2022-02-15 02:05:28,183 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 19110 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 19209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 19110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:28,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 505 Invalid, 19209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 19110 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 02:05:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-02-15 02:05:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-02-15 02:05:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.0121065375302662) internal successors, (418), 413 states have internal predecessors, (418), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 422 transitions. [2022-02-15 02:05:28,245 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 422 transitions. Word has length 233 [2022-02-15 02:05:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:28,246 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 422 transitions. [2022-02-15 02:05:28,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.708955223880597) internal successors, (229), 133 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 422 transitions. [2022-02-15 02:05:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-02-15 02:05:28,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:28,247 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:28,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 02:05:28,247 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash -353723555, now seen corresponding path program 72 times [2022-02-15 02:05:28,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:28,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292137506] [2022-02-15 02:05:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:28,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:28,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:28,295 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:28,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:28,346 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:28,346 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:28,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:28,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:32,393 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:32,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292137506] [2022-02-15 02:05:32,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [292137506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:32,393 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:32,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-02-15 02:05:32,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442227474] [2022-02-15 02:05:32,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:32,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-02-15 02:05:32,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:32,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-02-15 02:05:32,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4718, Invalid=14188, Unknown=0, NotChecked=0, Total=18906 [2022-02-15 02:05:32,395 INFO L87 Difference]: Start difference. First operand 418 states and 422 transitions. Second operand has 135 states, 135 states have (on average 1.711111111111111) internal successors, (231), 134 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:40,795 INFO L93 Difference]: Finished difference Result 647 states and 657 transitions. [2022-02-15 02:05:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-02-15 02:05:40,795 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.711111111111111) internal successors, (231), 134 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-02-15 02:05:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:40,796 INFO L225 Difference]: With dead ends: 647 [2022-02-15 02:05:40,796 INFO L226 Difference]: Without dead ends: 421 [2022-02-15 02:05:40,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20142 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=13887, Invalid=58743, Unknown=0, NotChecked=0, Total=72630 [2022-02-15 02:05:40,799 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 295 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17671 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 17671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:40,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 25 Invalid, 18001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 17671 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 02:05:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-02-15 02:05:40,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2022-02-15 02:05:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 416 states have (on average 1.0120192307692308) internal successors, (421), 416 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 425 transitions. [2022-02-15 02:05:40,862 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 425 transitions. Word has length 235 [2022-02-15 02:05:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:40,863 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 425 transitions. [2022-02-15 02:05:40,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.711111111111111) internal successors, (231), 134 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 425 transitions. [2022-02-15 02:05:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-02-15 02:05:40,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:40,864 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:40,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 02:05:40,864 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1857247659, now seen corresponding path program 73 times [2022-02-15 02:05:40,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:40,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809443381] [2022-02-15 02:05:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:40,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,955 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,956 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:40,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:41,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:41,027 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:41,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:41,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:46,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:46,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809443381] [2022-02-15 02:05:46,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [809443381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:46,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:46,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-02-15 02:05:46,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314559300] [2022-02-15 02:05:46,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:46,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-02-15 02:05:46,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:46,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-02-15 02:05:46,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4811, Invalid=13821, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 02:05:46,097 INFO L87 Difference]: Start difference. First operand 421 states and 425 transitions. Second operand has 137 states, 137 states have (on average 1.7080291970802919) internal successors, (234), 136 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:56,654 INFO L93 Difference]: Finished difference Result 657 states and 673 transitions. [2022-02-15 02:05:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-15 02:05:56,654 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.7080291970802919) internal successors, (234), 136 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-02-15 02:05:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:56,656 INFO L225 Difference]: With dead ends: 657 [2022-02-15 02:05:56,656 INFO L226 Difference]: Without dead ends: 430 [2022-02-15 02:05:56,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19949 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=14427, Invalid=58743, Unknown=0, NotChecked=0, Total=73170 [2022-02-15 02:05:56,659 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 394 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17963 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 17963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:56,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 39 Invalid, 18497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 17963 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-02-15 02:05:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-02-15 02:05:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 244. [2022-02-15 02:05:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0167364016736402) internal successors, (243), 239 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 247 transitions. [2022-02-15 02:05:56,694 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 247 transitions. Word has length 238 [2022-02-15 02:05:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:56,694 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 247 transitions. [2022-02-15 02:05:56,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.7080291970802919) internal successors, (234), 136 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 247 transitions. [2022-02-15 02:05:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-02-15 02:05:56,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:56,695 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:56,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 02:05:56,695 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1293292558, now seen corresponding path program 74 times [2022-02-15 02:05:56,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:56,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483742865] [2022-02-15 02:05:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:56,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:56,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:56,759 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:56,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:56,802 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:56,802 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:57,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:00,957 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:00,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483742865] [2022-02-15 02:06:00,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1483742865] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:00,958 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:00,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-15 02:06:00,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943323938] [2022-02-15 02:06:00,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:00,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-15 02:06:00,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:00,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-15 02:06:00,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5033, Invalid=14427, Unknown=0, NotChecked=0, Total=19460 [2022-02-15 02:06:00,960 INFO L87 Difference]: Start difference. First operand 244 states and 247 transitions. Second operand has 140 states, 140 states have (on average 1.707142857142857) internal successors, (239), 139 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:11,945 INFO L93 Difference]: Finished difference Result 485 states and 496 transitions. [2022-02-15 02:06:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-15 02:06:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.707142857142857) internal successors, (239), 139 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-02-15 02:06:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:11,946 INFO L225 Difference]: With dead ends: 485 [2022-02-15 02:06:11,946 INFO L226 Difference]: Without dead ends: 249 [2022-02-15 02:06:11,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20917 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=15093, Invalid=61359, Unknown=0, NotChecked=0, Total=76452 [2022-02-15 02:06:11,950 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 403 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 18784 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 19229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 18784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:11,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 49 Invalid, 19229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 18784 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-15 02:06:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-15 02:06:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-02-15 02:06:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0163934426229508) internal successors, (248), 244 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 252 transitions. [2022-02-15 02:06:11,986 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 252 transitions. Word has length 243 [2022-02-15 02:06:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:11,986 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 252 transitions. [2022-02-15 02:06:11,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.707142857142857) internal successors, (239), 139 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 252 transitions. [2022-02-15 02:06:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-02-15 02:06:11,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:11,987 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:11,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 02:06:11,987 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1507105313, now seen corresponding path program 75 times [2022-02-15 02:06:11,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:11,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904440844] [2022-02-15 02:06:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:12,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:12,070 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:12,070 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:12,083 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:12,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:12,116 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:12,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:12,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:16,514 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:16,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904440844] [2022-02-15 02:06:16,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904440844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:16,518 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:16,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-02-15 02:06:16,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353323440] [2022-02-15 02:06:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:16,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-02-15 02:06:16,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-02-15 02:06:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5260, Invalid=15046, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 02:06:16,520 INFO L87 Difference]: Start difference. First operand 249 states and 252 transitions. Second operand has 143 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 142 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:29,661 INFO L93 Difference]: Finished difference Result 495 states and 506 transitions. [2022-02-15 02:06:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-15 02:06:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 142 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2022-02-15 02:06:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:29,662 INFO L225 Difference]: With dead ends: 495 [2022-02-15 02:06:29,662 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 02:06:29,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21828 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=15774, Invalid=64032, Unknown=0, NotChecked=0, Total=79806 [2022-02-15 02:06:29,666 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 714 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 19644 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 20503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 19644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:29,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 49 Invalid, 20503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 19644 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-15 02:06:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 02:06:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-02-15 02:06:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0160642570281124) internal successors, (253), 249 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 257 transitions. [2022-02-15 02:06:29,702 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 257 transitions. Word has length 248 [2022-02-15 02:06:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:29,702 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 257 transitions. [2022-02-15 02:06:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 142 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 257 transitions. [2022-02-15 02:06:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-02-15 02:06:29,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:29,703 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:29,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 02:06:29,703 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:29,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:29,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1342329562, now seen corresponding path program 76 times [2022-02-15 02:06:29,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:29,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057206625] [2022-02-15 02:06:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:29,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:29,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:29,769 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:29,786 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:29,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:29,845 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:29,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:30,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:35,175 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:35,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057206625] [2022-02-15 02:06:35,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2057206625] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:35,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:35,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-02-15 02:06:35,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347363948] [2022-02-15 02:06:35,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:35,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-15 02:06:35,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-15 02:06:35,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1264, Invalid=20788, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 02:06:35,178 INFO L87 Difference]: Start difference. First operand 254 states and 257 transitions. Second operand has 146 states, 146 states have (on average 1.7054794520547945) internal successors, (249), 145 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:44,604 INFO L93 Difference]: Finished difference Result 700 states and 710 transitions. [2022-02-15 02:06:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-15 02:06:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.7054794520547945) internal successors, (249), 145 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-02-15 02:06:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:44,606 INFO L225 Difference]: With dead ends: 700 [2022-02-15 02:06:44,606 INFO L226 Difference]: Without dead ends: 454 [2022-02-15 02:06:44,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10059 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1773, Invalid=60477, Unknown=0, NotChecked=0, Total=62250 [2022-02-15 02:06:44,608 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 111 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 21948 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 22055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 21948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:44,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 535 Invalid, 22055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 21948 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-15 02:06:44,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-02-15 02:06:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-02-15 02:06:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 449 states have (on average 1.0111358574610245) internal successors, (454), 449 states have internal predecessors, (454), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 458 transitions. [2022-02-15 02:06:44,680 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 458 transitions. Word has length 253 [2022-02-15 02:06:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:44,681 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 458 transitions. [2022-02-15 02:06:44,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.7054794520547945) internal successors, (249), 145 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:44,681 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 458 transitions. [2022-02-15 02:06:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-02-15 02:06:44,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:44,682 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:44,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 02:06:44,682 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash 772028277, now seen corresponding path program 77 times [2022-02-15 02:06:44,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:44,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806424113] [2022-02-15 02:06:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:44,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:44,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:44,778 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:44,796 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:44,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:44,855 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:44,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:45,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:50,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:50,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806424113] [2022-02-15 02:06:50,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806424113] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:50,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:50,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-02-15 02:06:50,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570585418] [2022-02-15 02:06:50,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:50,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-02-15 02:06:50,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:50,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-02-15 02:06:50,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5632, Invalid=16718, Unknown=0, NotChecked=0, Total=22350 [2022-02-15 02:06:50,500 INFO L87 Difference]: Start difference. First operand 454 states and 458 transitions. Second operand has 147 states, 147 states have (on average 1.7074829931972788) internal successors, (251), 146 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:00,386 INFO L93 Difference]: Finished difference Result 703 states and 713 transitions. [2022-02-15 02:07:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-02-15 02:07:00,387 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.7074829931972788) internal successors, (251), 146 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-02-15 02:07:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:00,388 INFO L225 Difference]: With dead ends: 703 [2022-02-15 02:07:00,388 INFO L226 Difference]: Without dead ends: 457 [2022-02-15 02:07:00,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24002 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=16601, Invalid=69541, Unknown=0, NotChecked=0, Total=86142 [2022-02-15 02:07:00,392 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 735 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 20783 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 20783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:00,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 40 Invalid, 21556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 20783 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-15 02:07:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-02-15 02:07:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2022-02-15 02:07:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 452 states have (on average 1.011061946902655) internal successors, (457), 452 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 461 transitions. [2022-02-15 02:07:00,474 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 461 transitions. Word has length 255 [2022-02-15 02:07:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:00,475 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 461 transitions. [2022-02-15 02:07:00,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.7074829931972788) internal successors, (251), 146 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 461 transitions. [2022-02-15 02:07:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-02-15 02:07:00,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:00,476 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:00,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 02:07:00,476 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash -756347885, now seen corresponding path program 78 times [2022-02-15 02:07:00,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:00,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056980833] [2022-02-15 02:07:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:00,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:00,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:00,547 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:00,572 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:00,630 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:00,631 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:00,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:01,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:05,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:05,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056980833] [2022-02-15 02:07:05,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2056980833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:05,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:05,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-02-15 02:07:05,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593255526] [2022-02-15 02:07:05,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:05,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-02-15 02:07:05,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:05,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-02-15 02:07:05,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=21638, Unknown=0, NotChecked=0, Total=22952 [2022-02-15 02:07:05,629 INFO L87 Difference]: Start difference. First operand 457 states and 461 transitions. Second operand has 149 states, 149 states have (on average 1.7046979865771812) internal successors, (254), 148 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:17,453 INFO L93 Difference]: Finished difference Result 706 states and 715 transitions. [2022-02-15 02:07:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-15 02:07:17,454 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.7046979865771812) internal successors, (254), 148 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2022-02-15 02:07:17,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:17,455 INFO L225 Difference]: With dead ends: 706 [2022-02-15 02:07:17,455 INFO L226 Difference]: Without dead ends: 459 [2022-02-15 02:07:17,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10465 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1833, Invalid=62937, Unknown=0, NotChecked=0, Total=64770 [2022-02-15 02:07:17,458 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 113 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 22794 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 22902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 22794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:17,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 545 Invalid, 22902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 22794 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-02-15 02:07:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-02-15 02:07:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2022-02-15 02:07:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 454 states have (on average 1.0110132158590308) internal successors, (459), 454 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 463 transitions. [2022-02-15 02:07:17,530 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 463 transitions. Word has length 258 [2022-02-15 02:07:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:17,530 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 463 transitions. [2022-02-15 02:07:17,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.7046979865771812) internal successors, (254), 148 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 463 transitions. [2022-02-15 02:07:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-02-15 02:07:17,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:17,531 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:17,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 02:07:17,532 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1493774248, now seen corresponding path program 79 times [2022-02-15 02:07:17,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:17,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278224696] [2022-02-15 02:07:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:17,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,607 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:17,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,667 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:17,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:18,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:22,996 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:22,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278224696] [2022-02-15 02:07:22,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1278224696] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:22,997 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:22,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-02-15 02:07:22,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245467189] [2022-02-15 02:07:22,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:22,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-02-15 02:07:22,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-02-15 02:07:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1317, Invalid=21939, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 02:07:22,999 INFO L87 Difference]: Start difference. First operand 459 states and 463 transitions. Second operand has 150 states, 150 states have (on average 1.7066666666666668) internal successors, (256), 149 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:33,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:33,775 INFO L93 Difference]: Finished difference Result 708 states and 717 transitions. [2022-02-15 02:07:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-15 02:07:33,775 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.7066666666666668) internal successors, (256), 149 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2022-02-15 02:07:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:33,776 INFO L225 Difference]: With dead ends: 708 [2022-02-15 02:07:33,776 INFO L226 Difference]: Without dead ends: 461 [2022-02-15 02:07:33,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10617 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1841, Invalid=63951, Unknown=0, NotChecked=0, Total=65792 [2022-02-15 02:07:33,779 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 23653 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 23762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 23653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:33,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 560 Invalid, 23762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 23653 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-02-15 02:07:33,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-02-15 02:07:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2022-02-15 02:07:33,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 456 states have (on average 1.0109649122807018) internal successors, (461), 456 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 465 transitions. [2022-02-15 02:07:33,860 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 465 transitions. Word has length 260 [2022-02-15 02:07:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:33,860 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 465 transitions. [2022-02-15 02:07:33,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.7066666666666668) internal successors, (256), 149 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 465 transitions. [2022-02-15 02:07:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-02-15 02:07:33,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:33,861 INFO L514 BasicCegarLoop]: trace histogram [104, 103, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:33,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 02:07:33,861 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1490905251, now seen corresponding path program 80 times [2022-02-15 02:07:33,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:33,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346857118] [2022-02-15 02:07:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:33,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,940 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:33,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:34,007 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:34,007 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:34,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:34,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:39,809 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:39,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346857118] [2022-02-15 02:07:39,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346857118] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:39,810 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:39,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-02-15 02:07:39,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517441697] [2022-02-15 02:07:39,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:39,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-02-15 02:07:39,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:39,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-02-15 02:07:39,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5914, Invalid=17648, Unknown=0, NotChecked=0, Total=23562 [2022-02-15 02:07:39,812 INFO L87 Difference]: Start difference. First operand 461 states and 465 transitions. Second operand has 151 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 150 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:50,642 INFO L93 Difference]: Finished difference Result 711 states and 721 transitions. [2022-02-15 02:07:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-02-15 02:07:50,643 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 150 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-02-15 02:07:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:50,644 INFO L225 Difference]: With dead ends: 711 [2022-02-15 02:07:50,644 INFO L226 Difference]: Without dead ends: 464 [2022-02-15 02:07:50,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25299 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=17444, Invalid=73458, Unknown=0, NotChecked=0, Total=90902 [2022-02-15 02:07:50,648 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 544 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21918 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 21918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:50,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 35 Invalid, 22504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 21918 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-15 02:07:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-02-15 02:07:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2022-02-15 02:07:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 459 states have (on average 1.0108932461873639) internal successors, (464), 459 states have internal predecessors, (464), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 468 transitions. [2022-02-15 02:07:50,723 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 468 transitions. Word has length 262 [2022-02-15 02:07:50,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:50,724 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 468 transitions. [2022-02-15 02:07:50,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 150 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 468 transitions. [2022-02-15 02:07:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-02-15 02:07:50,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:50,725 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:50,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 02:07:50,725 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:50,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:50,725 INFO L85 PathProgramCache]: Analyzing trace with hash 633058945, now seen corresponding path program 81 times [2022-02-15 02:07:50,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:50,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386533043] [2022-02-15 02:07:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:50,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:50,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:50,790 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:50,808 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:50,888 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:50,888 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:50,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:51,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:56,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:56,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386533043] [2022-02-15 02:07:56,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1386533043] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:56,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:56,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-02-15 02:07:56,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591909426] [2022-02-15 02:07:56,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:56,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-02-15 02:07:56,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:56,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-02-15 02:07:56,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6113, Invalid=18067, Unknown=0, NotChecked=0, Total=24180 [2022-02-15 02:07:56,496 INFO L87 Difference]: Start difference. First operand 464 states and 468 transitions. Second operand has 153 states, 153 states have (on average 1.7058823529411764) internal successors, (261), 152 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:08,354 INFO L93 Difference]: Finished difference Result 715 states and 725 transitions. [2022-02-15 02:08:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-15 02:08:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.7058823529411764) internal successors, (261), 152 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-02-15 02:08:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:08,356 INFO L225 Difference]: With dead ends: 715 [2022-02-15 02:08:08,356 INFO L226 Difference]: Without dead ends: 467 [2022-02-15 02:08:08,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26055 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=18036, Invalid=75294, Unknown=0, NotChecked=0, Total=93330 [2022-02-15 02:08:08,361 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 762 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22687 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 22687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:08,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 35 Invalid, 23489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 22687 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-15 02:08:08,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-02-15 02:08:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2022-02-15 02:08:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 462 states have (on average 1.0108225108225108) internal successors, (467), 462 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 471 transitions. [2022-02-15 02:08:08,452 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 471 transitions. Word has length 265 [2022-02-15 02:08:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:08,453 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 471 transitions. [2022-02-15 02:08:08,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.7058823529411764) internal successors, (261), 152 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 471 transitions. [2022-02-15 02:08:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-02-15 02:08:08,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:08,454 INFO L514 BasicCegarLoop]: trace histogram [106, 105, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:08,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 02:08:08,454 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:08,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:08,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2007823289, now seen corresponding path program 82 times [2022-02-15 02:08:08,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:08,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848422190] [2022-02-15 02:08:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:08,496 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:08,511 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:08,512 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:08,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:08,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:08,566 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:08,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:09,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:15,257 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:15,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848422190] [2022-02-15 02:08:15,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848422190] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:15,258 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:15,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-02-15 02:08:15,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844515013] [2022-02-15 02:08:15,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:15,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-02-15 02:08:15,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:15,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-02-15 02:08:15,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1417, Invalid=23389, Unknown=0, NotChecked=0, Total=24806 [2022-02-15 02:08:15,261 INFO L87 Difference]: Start difference. First operand 467 states and 471 transitions. Second operand has 155 states, 155 states have (on average 1.7032258064516128) internal successors, (264), 154 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:26,869 INFO L93 Difference]: Finished difference Result 718 states and 727 transitions. [2022-02-15 02:08:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-15 02:08:26,869 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.7032258064516128) internal successors, (264), 154 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2022-02-15 02:08:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:26,870 INFO L225 Difference]: With dead ends: 718 [2022-02-15 02:08:26,870 INFO L226 Difference]: Without dead ends: 469 [2022-02-15 02:08:26,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11301 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1956, Invalid=68004, Unknown=0, NotChecked=0, Total=69960 [2022-02-15 02:08:26,873 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 24753 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 24865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 24753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:26,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 570 Invalid, 24865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 24753 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-02-15 02:08:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-02-15 02:08:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2022-02-15 02:08:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 464 states have (on average 1.0107758620689655) internal successors, (469), 464 states have internal predecessors, (469), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 473 transitions. [2022-02-15 02:08:26,945 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 473 transitions. Word has length 268 [2022-02-15 02:08:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:26,945 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 473 transitions. [2022-02-15 02:08:26,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.7032258064516128) internal successors, (264), 154 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 473 transitions. [2022-02-15 02:08:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-02-15 02:08:26,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:26,946 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:26,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 02:08:26,947 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1159593548, now seen corresponding path program 83 times [2022-02-15 02:08:26,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:26,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633127701] [2022-02-15 02:08:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:27,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:27,028 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:27,028 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:27,046 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:27,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:27,096 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:27,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:27,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:32,777 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:32,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633127701] [2022-02-15 02:08:32,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1633127701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:32,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:32,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-02-15 02:08:32,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793545650] [2022-02-15 02:08:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:32,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-02-15 02:08:32,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:32,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-02-15 02:08:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6266, Invalid=17914, Unknown=0, NotChecked=0, Total=24180 [2022-02-15 02:08:32,781 INFO L87 Difference]: Start difference. First operand 469 states and 473 transitions. Second operand has 156 states, 156 states have (on average 1.705128205128205) internal successors, (266), 155 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:49,179 INFO L93 Difference]: Finished difference Result 737 states and 763 transitions. [2022-02-15 02:08:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-02-15 02:08:49,179 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.705128205128205) internal successors, (266), 155 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-02-15 02:08:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:49,181 INFO L225 Difference]: With dead ends: 737 [2022-02-15 02:08:49,181 INFO L226 Difference]: Without dead ends: 488 [2022-02-15 02:08:49,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26123 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=18792, Invalid=76380, Unknown=0, NotChecked=0, Total=95172 [2022-02-15 02:08:49,184 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 556 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 23189 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 23189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:49,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 39 Invalid, 23582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 23189 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-02-15 02:08:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-02-15 02:08:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 276. [2022-02-15 02:08:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 279 transitions. [2022-02-15 02:08:49,229 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 279 transitions. Word has length 270 [2022-02-15 02:08:49,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:49,229 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 279 transitions. [2022-02-15 02:08:49,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.705128205128205) internal successors, (266), 155 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 279 transitions. [2022-02-15 02:08:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-02-15 02:08:49,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:49,230 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:49,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 02:08:49,230 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 343845773, now seen corresponding path program 84 times [2022-02-15 02:08:49,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:49,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362641289] [2022-02-15 02:08:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:49,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:49,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:49,320 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:49,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:49,396 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:49,397 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:49,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:50,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:56,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:56,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362641289] [2022-02-15 02:08:56,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [362641289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:56,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:56,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-02-15 02:08:56,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378869319] [2022-02-15 02:08:56,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:56,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-02-15 02:08:56,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:56,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-02-15 02:08:56,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6734, Invalid=19348, Unknown=0, NotChecked=0, Total=26082 [2022-02-15 02:08:56,249 INFO L87 Difference]: Start difference. First operand 276 states and 279 transitions. Second operand has 159 states, 159 states have (on average 1.7044025157232705) internal successors, (271), 158 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:09,718 INFO L93 Difference]: Finished difference Result 763 states and 774 transitions. [2022-02-15 02:09:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-15 02:09:09,719 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.7044025157232705) internal successors, (271), 158 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-02-15 02:09:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:09,720 INFO L225 Difference]: With dead ends: 763 [2022-02-15 02:09:09,720 INFO L226 Difference]: Without dead ends: 495 [2022-02-15 02:09:09,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28202 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=19771, Invalid=81035, Unknown=0, NotChecked=0, Total=100806 [2022-02-15 02:09:09,724 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 791 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24643 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 24643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:09,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 34 Invalid, 25478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 24643 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-15 02:09:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-15 02:09:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2022-02-15 02:09:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.010204081632653) internal successors, (495), 490 states have internal predecessors, (495), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 499 transitions. [2022-02-15 02:09:09,818 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 499 transitions. Word has length 275 [2022-02-15 02:09:09,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:09,818 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 499 transitions. [2022-02-15 02:09:09,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.7044025157232705) internal successors, (271), 158 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:09,818 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 499 transitions. [2022-02-15 02:09:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-02-15 02:09:09,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:09,819 INFO L514 BasicCegarLoop]: trace histogram [110, 109, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:09,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 02:09:09,820 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1719936635, now seen corresponding path program 85 times [2022-02-15 02:09:09,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:09,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892329266] [2022-02-15 02:09:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:09,867 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:09,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:09,882 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:09,894 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:09,935 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:09,936 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:09,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:10,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:14,777 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:14,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892329266] [2022-02-15 02:09:14,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [892329266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:14,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:14,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-02-15 02:09:14,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279551243] [2022-02-15 02:09:14,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:14,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-02-15 02:09:14,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:14,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-02-15 02:09:14,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6945, Invalid=19787, Unknown=0, NotChecked=0, Total=26732 [2022-02-15 02:09:14,781 INFO L87 Difference]: Start difference. First operand 495 states and 499 transitions. Second operand has 161 states, 161 states have (on average 1.7018633540372672) internal successors, (274), 160 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:27,361 INFO L93 Difference]: Finished difference Result 767 states and 777 transitions. [2022-02-15 02:09:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-02-15 02:09:27,362 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.7018633540372672) internal successors, (274), 160 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-02-15 02:09:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:27,363 INFO L225 Difference]: With dead ends: 767 [2022-02-15 02:09:27,363 INFO L226 Difference]: Without dead ends: 498 [2022-02-15 02:09:27,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28998 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=20398, Invalid=82964, Unknown=0, NotChecked=0, Total=103362 [2022-02-15 02:09:27,367 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 571 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 25156 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 25772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 25156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:27,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 49 Invalid, 25772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 25156 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-02-15 02:09:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-15 02:09:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2022-02-15 02:09:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 493 states have (on average 1.0101419878296145) internal successors, (498), 493 states have internal predecessors, (498), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 502 transitions. [2022-02-15 02:09:27,453 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 502 transitions. Word has length 278 [2022-02-15 02:09:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:27,453 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 502 transitions. [2022-02-15 02:09:27,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.7018633540372672) internal successors, (274), 160 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 502 transitions. [2022-02-15 02:09:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-02-15 02:09:27,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:27,454 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:27,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 02:09:27,454 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:27,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1042221789, now seen corresponding path program 86 times [2022-02-15 02:09:27,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:27,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296540232] [2022-02-15 02:09:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:27,528 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:27,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:27,547 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:27,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:27,612 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:27,612 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:28,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:34,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:34,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296540232] [2022-02-15 02:09:34,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296540232] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:34,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:34,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2022-02-15 02:09:34,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607741391] [2022-02-15 02:09:34,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:34,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-02-15 02:09:34,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-02-15 02:09:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7041, Invalid=20349, Unknown=0, NotChecked=0, Total=27390 [2022-02-15 02:09:34,151 INFO L87 Difference]: Start difference. First operand 498 states and 502 transitions. Second operand has 163 states, 163 states have (on average 1.6993865030674846) internal successors, (277), 162 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:49,930 INFO L93 Difference]: Finished difference Result 771 states and 781 transitions. [2022-02-15 02:09:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-02-15 02:09:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.6993865030674846) internal successors, (277), 162 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-02-15 02:09:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:49,932 INFO L225 Difference]: With dead ends: 771 [2022-02-15 02:09:49,932 INFO L226 Difference]: Without dead ends: 501 [2022-02-15 02:09:49,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29796 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=20798, Invalid=85152, Unknown=0, NotChecked=0, Total=105950 [2022-02-15 02:09:49,936 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 797 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 25473 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 26319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 25473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:49,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 65 Invalid, 26319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 25473 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-02-15 02:09:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-02-15 02:09:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-02-15 02:09:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 496 states have (on average 1.0100806451612903) internal successors, (501), 496 states have internal predecessors, (501), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 505 transitions. [2022-02-15 02:09:50,036 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 505 transitions. Word has length 281 [2022-02-15 02:09:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:50,036 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 505 transitions. [2022-02-15 02:09:50,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.6993865030674846) internal successors, (277), 162 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 505 transitions. [2022-02-15 02:09:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-02-15 02:09:50,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:50,038 INFO L514 BasicCegarLoop]: trace histogram [112, 111, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:50,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 02:09:50,038 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:50,038 INFO L85 PathProgramCache]: Analyzing trace with hash 996177893, now seen corresponding path program 87 times [2022-02-15 02:09:50,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:50,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593602794] [2022-02-15 02:09:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:50,101 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:50,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:50,125 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:50,149 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:50,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:50,204 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:50,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:51,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:59,506 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:59,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593602794] [2022-02-15 02:09:59,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593602794] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:59,507 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:59,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-02-15 02:09:59,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227433299] [2022-02-15 02:09:59,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:59,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-02-15 02:09:59,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:59,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-02-15 02:09:59,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1629, Invalid=26427, Unknown=0, NotChecked=0, Total=28056 [2022-02-15 02:09:59,510 INFO L87 Difference]: Start difference. First operand 501 states and 505 transitions. Second operand has 165 states, 165 states have (on average 1.696969696969697) internal successors, (280), 164 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:15,126 INFO L93 Difference]: Finished difference Result 774 states and 783 transitions. [2022-02-15 02:10:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-15 02:10:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.696969696969697) internal successors, (280), 164 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2022-02-15 02:10:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:15,128 INFO L225 Difference]: With dead ends: 774 [2022-02-15 02:10:15,128 INFO L226 Difference]: Without dead ends: 503 [2022-02-15 02:10:15,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12732 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=2198, Invalid=76482, Unknown=0, NotChecked=0, Total=78680 [2022-02-15 02:10:15,131 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 123 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 26790 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 26908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 26790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:15,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 585 Invalid, 26908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 26790 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-02-15 02:10:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-02-15 02:10:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2022-02-15 02:10:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 498 states have (on average 1.0100401606425702) internal successors, (503), 498 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 507 transitions. [2022-02-15 02:10:15,222 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 507 transitions. Word has length 284 [2022-02-15 02:10:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:15,222 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 507 transitions. [2022-02-15 02:10:15,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.696969696969697) internal successors, (280), 164 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 507 transitions. [2022-02-15 02:10:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-02-15 02:10:15,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:15,224 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:15,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 02:10:15,224 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:15,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1264107498, now seen corresponding path program 88 times [2022-02-15 02:10:15,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:15,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521795004] [2022-02-15 02:10:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:15,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:15,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:15,294 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:15,310 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:15,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:15,343 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:15,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:21,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:21,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521795004] [2022-02-15 02:10:21,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521795004] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:21,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:21,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-02-15 02:10:21,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88723651] [2022-02-15 02:10:21,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:21,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-02-15 02:10:21,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-02-15 02:10:21,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7421, Invalid=20971, Unknown=0, NotChecked=0, Total=28392 [2022-02-15 02:10:21,045 INFO L87 Difference]: Start difference. First operand 503 states and 507 transitions. Second operand has 166 states, 166 states have (on average 1.6987951807228916) internal successors, (282), 165 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:39,271 INFO L93 Difference]: Finished difference Result 777 states and 787 transitions. [2022-02-15 02:10:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-02-15 02:10:39,271 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.6987951807228916) internal successors, (282), 165 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-02-15 02:10:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:39,273 INFO L225 Difference]: With dead ends: 777 [2022-02-15 02:10:39,273 INFO L226 Difference]: Without dead ends: 506 [2022-02-15 02:10:39,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30927 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=21820, Invalid=88072, Unknown=0, NotChecked=0, Total=109892 [2022-02-15 02:10:39,277 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 817 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 26243 mSolverCounterSat, 861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 27104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 861 IncrementalHoareTripleChecker+Valid, 26243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:39,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 75 Invalid, 27104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [861 Valid, 26243 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-02-15 02:10:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-02-15 02:10:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-02-15 02:10:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.0099800399201597) internal successors, (506), 501 states have internal predecessors, (506), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 510 transitions. [2022-02-15 02:10:39,368 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 510 transitions. Word has length 286 [2022-02-15 02:10:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:39,369 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 510 transitions. [2022-02-15 02:10:39,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.6987951807228916) internal successors, (282), 165 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 510 transitions. [2022-02-15 02:10:39,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-02-15 02:10:39,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:39,370 INFO L514 BasicCegarLoop]: trace histogram [114, 113, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:39,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 02:10:39,370 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:39,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:39,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1885176172, now seen corresponding path program 89 times [2022-02-15 02:10:39,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:39,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789986304] [2022-02-15 02:10:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:39,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:39,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:39,455 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:39,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:39,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:39,509 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:39,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:40,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:45,535 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:45,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789986304] [2022-02-15 02:10:45,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1789986304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:45,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:45,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-02-15 02:10:45,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763063492] [2022-02-15 02:10:45,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:45,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-02-15 02:10:45,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:45,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-02-15 02:10:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7533, Invalid=21537, Unknown=0, NotChecked=0, Total=29070 [2022-02-15 02:10:45,538 INFO L87 Difference]: Start difference. First operand 506 states and 510 transitions. Second operand has 168 states, 168 states have (on average 1.6964285714285714) internal successors, (285), 167 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:00,187 INFO L93 Difference]: Finished difference Result 781 states and 791 transitions. [2022-02-15 02:11:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-02-15 02:11:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.6964285714285714) internal successors, (285), 167 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-02-15 02:11:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:00,188 INFO L225 Difference]: With dead ends: 781 [2022-02-15 02:11:00,188 INFO L226 Difference]: Without dead ends: 509 [2022-02-15 02:11:00,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31760 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=22259, Invalid=90301, Unknown=0, NotChecked=0, Total=112560 [2022-02-15 02:11:00,193 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 590 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 26623 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 27260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 26623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:00,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 65 Invalid, 27260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 26623 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-02-15 02:11:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-15 02:11:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2022-02-15 02:11:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 504 states have (on average 1.0099206349206349) internal successors, (509), 504 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 513 transitions. [2022-02-15 02:11:00,272 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 513 transitions. Word has length 289 [2022-02-15 02:11:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:00,273 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 513 transitions. [2022-02-15 02:11:00,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.6964285714285714) internal successors, (285), 167 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 513 transitions. [2022-02-15 02:11:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-02-15 02:11:00,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:00,274 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:00,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 02:11:00,274 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:00,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:00,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1710032788, now seen corresponding path program 90 times [2022-02-15 02:11:00,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:00,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029356117] [2022-02-15 02:11:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:00,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:00,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:00,336 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:00,375 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:00,416 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:00,416 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:00,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:01,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:05,214 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:05,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029356117] [2022-02-15 02:11:05,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029356117] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:05,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:05,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-02-15 02:11:05,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328085728] [2022-02-15 02:11:05,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:05,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-02-15 02:11:05,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:05,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-02-15 02:11:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7643, Invalid=21087, Unknown=0, NotChecked=0, Total=28730 [2022-02-15 02:11:05,217 INFO L87 Difference]: Start difference. First operand 509 states and 513 transitions. Second operand has 170 states, 170 states have (on average 1.6941176470588235) internal successors, (288), 169 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:19,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:19,849 INFO L93 Difference]: Finished difference Result 799 states and 823 transitions. [2022-02-15 02:11:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-02-15 02:11:19,849 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.6941176470588235) internal successors, (288), 169 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2022-02-15 02:11:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:19,850 INFO L225 Difference]: With dead ends: 799 [2022-02-15 02:11:19,851 INFO L226 Difference]: Without dead ends: 526 [2022-02-15 02:11:19,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31526 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=22923, Invalid=90309, Unknown=0, NotChecked=0, Total=113232 [2022-02-15 02:11:19,855 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 477 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26887 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 27307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 26887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:19,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 39 Invalid, 27307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 26887 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-02-15 02:11:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-02-15 02:11:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 298. [2022-02-15 02:11:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.0136518771331058) internal successors, (297), 293 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 301 transitions. [2022-02-15 02:11:19,897 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 301 transitions. Word has length 292 [2022-02-15 02:11:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:19,897 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 301 transitions. [2022-02-15 02:11:19,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.6941176470588235) internal successors, (288), 169 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 301 transitions. [2022-02-15 02:11:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-02-15 02:11:19,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:19,899 INFO L514 BasicCegarLoop]: trace histogram [117, 116, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:19,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 02:11:19,899 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash 270339781, now seen corresponding path program 91 times [2022-02-15 02:11:19,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:19,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104225160] [2022-02-15 02:11:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:19,957 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:19,975 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:19,976 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:20,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:20,044 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:20,045 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:20,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:20,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:25,099 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:25,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104225160] [2022-02-15 02:11:25,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104225160] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:25,099 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:25,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2022-02-15 02:11:25,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171806222] [2022-02-15 02:11:25,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:25,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-02-15 02:11:25,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:25,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-02-15 02:11:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7922, Invalid=21834, Unknown=0, NotChecked=0, Total=29756 [2022-02-15 02:11:25,103 INFO L87 Difference]: Start difference. First operand 298 states and 301 transitions. Second operand has 173 states, 173 states have (on average 1.69364161849711) internal successors, (293), 172 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:40,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:40,569 INFO L93 Difference]: Finished difference Result 593 states and 604 transitions. [2022-02-15 02:11:40,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-15 02:11:40,570 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.69364161849711) internal successors, (293), 172 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-02-15 02:11:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:40,571 INFO L225 Difference]: With dead ends: 593 [2022-02-15 02:11:40,571 INFO L226 Difference]: Without dead ends: 303 [2022-02-15 02:11:40,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32689 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=23760, Invalid=93546, Unknown=0, NotChecked=0, Total=117306 [2022-02-15 02:11:40,574 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 607 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27749 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 27749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:40,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 29 Invalid, 28530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 27749 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-02-15 02:11:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-15 02:11:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-02-15 02:11:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 298 states have (on average 1.0134228187919463) internal successors, (302), 298 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 306 transitions. [2022-02-15 02:11:40,618 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 306 transitions. Word has length 297 [2022-02-15 02:11:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:40,618 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 306 transitions. [2022-02-15 02:11:40,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.69364161849711) internal successors, (293), 172 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 306 transitions. [2022-02-15 02:11:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-02-15 02:11:40,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:40,620 INFO L514 BasicCegarLoop]: trace histogram [119, 118, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:40,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 02:11:40,620 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1535113592, now seen corresponding path program 92 times [2022-02-15 02:11:40,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:40,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518125549] [2022-02-15 02:11:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:40,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:40,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:40,679 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:40,695 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:40,726 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:40,726 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:40,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:41,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:47,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:47,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518125549] [2022-02-15 02:11:47,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518125549] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:47,281 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:47,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2022-02-15 02:11:47,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026973504] [2022-02-15 02:11:47,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:47,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-02-15 02:11:47,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-02-15 02:11:47,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8206, Invalid=22594, Unknown=0, NotChecked=0, Total=30800 [2022-02-15 02:11:47,284 INFO L87 Difference]: Start difference. First operand 303 states and 306 transitions. Second operand has 176 states, 176 states have (on average 1.6931818181818181) internal successors, (298), 175 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:07,058 INFO L93 Difference]: Finished difference Result 603 states and 614 transitions. [2022-02-15 02:12:07,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-02-15 02:12:07,058 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.6931818181818181) internal successors, (298), 175 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2022-02-15 02:12:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:07,059 INFO L225 Difference]: With dead ends: 603 [2022-02-15 02:12:07,059 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:12:07,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33873 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=24612, Invalid=96840, Unknown=0, NotChecked=0, Total=121452 [2022-02-15 02:12:07,065 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 495 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 28661 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 29212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 28661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:07,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 49 Invalid, 29212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 28661 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-02-15 02:12:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:12:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-02-15 02:12:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.0132013201320131) internal successors, (307), 303 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 311 transitions. [2022-02-15 02:12:07,111 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 311 transitions. Word has length 302 [2022-02-15 02:12:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:07,111 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 311 transitions. [2022-02-15 02:12:07,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.6931818181818181) internal successors, (298), 175 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 311 transitions. [2022-02-15 02:12:07,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-02-15 02:12:07,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:07,113 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:07,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 02:12:07,113 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1925426479, now seen corresponding path program 93 times [2022-02-15 02:12:07,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:07,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798665443] [2022-02-15 02:12:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:07,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:07,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:07,202 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:07,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:07,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:07,286 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:07,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:08,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:17,762 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:17,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798665443] [2022-02-15 02:12:17,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1798665443] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:17,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:17,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [179] imperfect sequences [] total 179 [2022-02-15 02:12:17,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459544668] [2022-02-15 02:12:17,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:17,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-02-15 02:12:17,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-02-15 02:12:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1921, Invalid=31021, Unknown=0, NotChecked=0, Total=32942 [2022-02-15 02:12:17,765 INFO L87 Difference]: Start difference. First operand 308 states and 311 transitions. Second operand has 179 states, 179 states have (on average 1.6927374301675977) internal successors, (303), 178 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:34,297 INFO L93 Difference]: Finished difference Result 850 states and 860 transitions. [2022-02-15 02:12:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-02-15 02:12:34,297 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 1.6927374301675977) internal successors, (303), 178 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-02-15 02:12:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:34,299 INFO L225 Difference]: With dead ends: 850 [2022-02-15 02:12:34,299 INFO L226 Difference]: Without dead ends: 550 [2022-02-15 02:12:34,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14910 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=2535, Invalid=89577, Unknown=0, NotChecked=0, Total=92112 [2022-02-15 02:12:34,302 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 32388 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 32516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 32388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:34,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 655 Invalid, 32516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 32388 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-02-15 02:12:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-02-15 02:12:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2022-02-15 02:12:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 545 states have (on average 1.0091743119266054) internal successors, (550), 545 states have internal predecessors, (550), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 554 transitions. [2022-02-15 02:12:34,388 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 554 transitions. Word has length 307 [2022-02-15 02:12:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:34,388 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 554 transitions. [2022-02-15 02:12:34,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 1.6927374301675977) internal successors, (303), 178 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 554 transitions. [2022-02-15 02:12:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-02-15 02:12:34,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:34,389 INFO L514 BasicCegarLoop]: trace histogram [122, 121, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:34,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 02:12:34,390 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1652217132, now seen corresponding path program 94 times [2022-02-15 02:12:34,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:34,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477208661] [2022-02-15 02:12:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:34,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:34,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:34,447 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:34,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:34,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:34,510 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:35,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:40,995 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:40,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477208661] [2022-02-15 02:12:40,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [477208661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:40,995 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:40,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [180] imperfect sequences [] total 180 [2022-02-15 02:12:40,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31754482] [2022-02-15 02:12:40,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:40,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2022-02-15 02:12:40,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:40,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2022-02-15 02:12:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8552, Invalid=23668, Unknown=0, NotChecked=0, Total=32220 [2022-02-15 02:12:40,998 INFO L87 Difference]: Start difference. First operand 550 states and 554 transitions. Second operand has 180 states, 180 states have (on average 1.6944444444444444) internal successors, (305), 179 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:00,773 INFO L93 Difference]: Finished difference Result 857 states and 871 transitions. [2022-02-15 02:13:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-02-15 02:13:00,774 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 1.6944444444444444) internal successors, (305), 179 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 309 [2022-02-15 02:13:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:00,775 INFO L225 Difference]: With dead ends: 857 [2022-02-15 02:13:00,775 INFO L226 Difference]: Without dead ends: 557 [2022-02-15 02:13:00,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35414 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=25650, Invalid=101442, Unknown=0, NotChecked=0, Total=127092 [2022-02-15 02:13:00,781 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 628 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 30244 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 30933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 30244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:00,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 49 Invalid, 30933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 30244 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-02-15 02:13:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-02-15 02:13:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 315. [2022-02-15 02:13:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2022-02-15 02:13:00,852 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 309 [2022-02-15 02:13:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:00,852 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2022-02-15 02:13:00,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 1.6944444444444444) internal successors, (305), 179 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2022-02-15 02:13:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-02-15 02:13:00,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:00,853 INFO L514 BasicCegarLoop]: trace histogram [124, 123, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:00,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 02:13:00,854 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:00,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:00,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1760727551, now seen corresponding path program 95 times [2022-02-15 02:13:00,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:00,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830092375] [2022-02-15 02:13:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:00,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:00,908 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:00,908 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:00,919 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:00,951 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:00,952 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:00,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:01,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:06,560 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:06,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830092375] [2022-02-15 02:13:06,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [830092375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:06,561 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:06,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [183] imperfect sequences [] total 183 [2022-02-15 02:13:06,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401256884] [2022-02-15 02:13:06,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:06,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-02-15 02:13:06,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-02-15 02:13:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8847, Invalid=24459, Unknown=0, NotChecked=0, Total=33306 [2022-02-15 02:13:06,564 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand has 183 states, 183 states have (on average 1.6939890710382515) internal successors, (310), 182 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)