/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/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:15:13,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:15:13,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:15:13,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:15:13,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 02:15:13,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 02:15:13,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 02:15:13,950 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 02:15:13,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:15:13,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:15:13,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:15:13,960 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:15:13,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:15:13,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:15:13,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:15:13,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:15:13,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:15:13,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:15:13,961 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:15:13,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:15:13,961 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:15:13,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:15:13,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:15:13,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:15:13,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:15:13,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:15:13,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:15:13,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:15:13,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:15:13,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:15:13,962 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:15:13,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:15:14,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:15:14,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:15:14,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:15:14,190 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:15:14,191 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:15:14,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-02-15 02:15:14,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc582f618/b19c51db8f5648a4b4ba361027c07076/FLAG93c488f25 [2022-02-15 02:15:14,644 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:15:14,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-02-15 02:15:14,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc582f618/b19c51db8f5648a4b4ba361027c07076/FLAG93c488f25 [2022-02-15 02:15:14,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc582f618/b19c51db8f5648a4b4ba361027c07076 [2022-02-15 02:15:14,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:15:14,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:15:14,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:15:14,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:15:14,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:15:14,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1378492a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14, skipping insertion in model container [2022-02-15 02:15:14,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:15:14,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:15:14,827 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/watermelon.c[373,386] [2022-02-15 02:15:14,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:15:14,853 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:15:14,864 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/watermelon.c[373,386] [2022-02-15 02:15:14,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:15:14,879 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:15:14,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14 WrapperNode [2022-02-15 02:15:14,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:15:14,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:15:14,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:15:14,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:15:14,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:15:14,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:15:14,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:15:14,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:15:14,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14" (1/1) ... [2022-02-15 02:15:14,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:15:14,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:15:14,948 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 02:15:14,958 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 02:15:14,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:15:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:15:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:15:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 02:15:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-02-15 02:15:14,981 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-02-15 02:15:14,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:15:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:15:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:15:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:15:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:15:14,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 02:15:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 02:15:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-02-15 02:15:14,983 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-02-15 02:15:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:15:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:15:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:15:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:15:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:15:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:15:14,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:15:15,039 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:15:15,040 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:15:15,235 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:15:15,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:15:15,239 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 02:15:15,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:15:15 BoogieIcfgContainer [2022-02-15 02:15:15,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:15:15,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:15:15,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:15:15,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:15:15,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:15:14" (1/3) ... [2022-02-15 02:15:15,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e63c08e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:15:15, skipping insertion in model container [2022-02-15 02:15:15,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:14" (2/3) ... [2022-02-15 02:15:15,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e63c08e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:15:15, skipping insertion in model container [2022-02-15 02:15:15,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:15:15" (3/3) ... [2022-02-15 02:15:15,259 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2022-02-15 02:15:15,263 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:15:15,263 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:15:15,306 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:15:15,313 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 02:15:15,313 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:15:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 02:15:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 02:15:15,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:15,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:15,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:15,342 INFO L85 PathProgramCache]: Analyzing trace with hash 345664661, now seen corresponding path program 1 times [2022-02-15 02:15:15,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:15,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067046474] [2022-02-15 02:15:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:15,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:15,398 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:15:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:15,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:15,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:15,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-15 02:15:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:15,715 INFO 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 02:15:15,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:15,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067046474] [2022-02-15 02:15:15,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067046474] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:15,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:15,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:15:15,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119873634] [2022-02-15 02:15:15,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:15,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:15:15,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:15:15,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:15:15,749 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:16,205 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-02-15 02:15:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:15:16,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-02-15 02:15:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:16,214 INFO L225 Difference]: With dead ends: 91 [2022-02-15 02:15:16,215 INFO L226 Difference]: Without dead ends: 42 [2022-02-15 02:15:16,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:15:16,221 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:16,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 89 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:15:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-15 02:15:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-02-15 02:15:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:15:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-02-15 02:15:16,261 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2022-02-15 02:15:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:16,261 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-02-15 02:15:16,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-02-15 02:15:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 02:15:16,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:16,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:16,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:15:16,263 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1324779677, now seen corresponding path program 1 times [2022-02-15 02:15:16,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:16,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558397795] [2022-02-15 02:15:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:16,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:16,266 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:15:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-15 02:15:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:16,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:16,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558397795] [2022-02-15 02:15:16,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [558397795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:16,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:16,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:15:16,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860175073] [2022-02-15 02:15:16,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:16,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:15:16,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:15:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:15:16,359 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:15:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:16,414 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-02-15 02:15:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:15:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-02-15 02:15:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:16,416 INFO L225 Difference]: With dead ends: 55 [2022-02-15 02:15:16,416 INFO L226 Difference]: Without dead ends: 42 [2022-02-15 02:15:16,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 02:15:16,417 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:16,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:15:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-15 02:15:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-02-15 02:15:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:15:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-02-15 02:15:16,427 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2022-02-15 02:15:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:16,428 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-02-15 02:15:16,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:15:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-02-15 02:15:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 02:15:16,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:16,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:16,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:15:16,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:16,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:16,430 INFO L85 PathProgramCache]: Analyzing trace with hash -855151641, now seen corresponding path program 1 times [2022-02-15 02:15:16,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:16,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558834413] [2022-02-15 02:15:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:16,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:16,432 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:15:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:15:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,478 INFO 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 02:15:16,478 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:16,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558834413] [2022-02-15 02:15:16,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [558834413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:16,491 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:16,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:15:16,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478627791] [2022-02-15 02:15:16,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:16,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:15:16,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:15:16,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:15:16,493 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:16,562 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-02-15 02:15:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:15:16,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-02-15 02:15:16,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:16,563 INFO L225 Difference]: With dead ends: 72 [2022-02-15 02:15:16,564 INFO L226 Difference]: Without dead ends: 43 [2022-02-15 02:15:16,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 02:15:16,571 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:16,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:15:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-15 02:15:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-02-15 02:15:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:15:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-02-15 02:15:16,585 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2022-02-15 02:15:16,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:16,585 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-02-15 02:15:16,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-02-15 02:15:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 02:15:16,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:16,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:16,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:15:16,587 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash 743790053, now seen corresponding path program 1 times [2022-02-15 02:15:16,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:16,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758918621] [2022-02-15 02:15:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:16,688 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:16,688 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:16,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-15 02:15:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:16,817 INFO 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 02:15:17,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:17,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758918621] [2022-02-15 02:15:17,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758918621] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:17,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:17,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:15:17,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349815010] [2022-02-15 02:15:17,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:17,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:15:17,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:15:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:15:17,009 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:17,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:17,251 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-02-15 02:15:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:15:17,251 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-02-15 02:15:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:17,252 INFO L225 Difference]: With dead ends: 56 [2022-02-15 02:15:17,252 INFO L226 Difference]: Without dead ends: 45 [2022-02-15 02:15:17,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:15:17,260 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:17,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 58 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 240 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-02-15 02:15:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-15 02:15:17,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-02-15 02:15:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:15:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-02-15 02:15:17,278 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2022-02-15 02:15:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:17,278 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-02-15 02:15:17,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-02-15 02:15:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 02:15:17,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:17,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:17,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:15:17,282 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:17,283 INFO L85 PathProgramCache]: Analyzing trace with hash 198429957, now seen corresponding path program 1 times [2022-02-15 02:15:17,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:17,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379293289] [2022-02-15 02:15:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:17,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:17,338 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:17,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:17,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:17,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:17,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:15:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:17,591 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:17,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379293289] [2022-02-15 02:15:17,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379293289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:17,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:17,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:15:17,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088418427] [2022-02-15 02:15:17,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:17,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:15:17,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:17,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:15:17,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:15:17,597 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:17,764 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-02-15 02:15:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:15:17,765 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-02-15 02:15:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:17,766 INFO L225 Difference]: With dead ends: 51 [2022-02-15 02:15:17,766 INFO L226 Difference]: Without dead ends: 42 [2022-02-15 02:15:17,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:15:17,767 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:17,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 51 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 178 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-02-15 02:15:17,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-15 02:15:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-15 02:15:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:15:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-02-15 02:15:17,775 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2022-02-15 02:15:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:17,776 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-02-15 02:15:17,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-02-15 02:15:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 02:15:17,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:17,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:17,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:15:17,777 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1589989783, now seen corresponding path program 1 times [2022-02-15 02:15:17,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:17,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772037391] [2022-02-15 02:15:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:17,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:17,813 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:17,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:17,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:17,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:15:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:17,885 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:17,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772037391] [2022-02-15 02:15:17,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772037391] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:17,885 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:17,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:15:17,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825982891] [2022-02-15 02:15:17,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:17,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:15:17,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:15:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:15:17,887 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:15:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:17,996 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-02-15 02:15:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 02:15:17,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-02-15 02:15:17,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:18,000 INFO L225 Difference]: With dead ends: 58 [2022-02-15 02:15:18,000 INFO L226 Difference]: Without dead ends: 45 [2022-02-15 02:15:18,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:15:18,001 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:18,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 44 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:15:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-15 02:15:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-02-15 02:15:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:15:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-02-15 02:15:18,015 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2022-02-15 02:15:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:18,015 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-02-15 02:15:18,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:15:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-02-15 02:15:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 02:15:18,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:18,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:18,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:15:18,017 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:18,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1518564121, now seen corresponding path program 2 times [2022-02-15 02:15:18,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:18,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126759464] [2022-02-15 02:15:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:18,060 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:18,061 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:18,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:18,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:18,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:18,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:15:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:20,608 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:20,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126759464] [2022-02-15 02:15:20,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126759464] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:20,608 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:20,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:15:20,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578178883] [2022-02-15 02:15:20,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:20,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:15:20,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:20,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:15:20,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:15:20,610 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:22,964 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-02-15 02:15:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:15:22,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-02-15 02:15:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:22,965 INFO L225 Difference]: With dead ends: 62 [2022-02-15 02:15:22,965 INFO L226 Difference]: Without dead ends: 56 [2022-02-15 02:15:22,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=139, Invalid=852, Unknown=1, NotChecked=0, Total=992 [2022-02-15 02:15:22,966 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:22,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 77 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 272 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-02-15 02:15:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-15 02:15:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-02-15 02:15:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:15:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-02-15 02:15:22,974 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 35 [2022-02-15 02:15:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:22,974 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-02-15 02:15:22,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-02-15 02:15:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 02:15:22,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:22,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:22,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:15:22,981 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1057360469, now seen corresponding path program 1 times [2022-02-15 02:15:22,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:22,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372142945] [2022-02-15 02:15:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:23,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:23,023 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:23,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:15:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,094 INFO 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 02:15:23,110 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:23,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372142945] [2022-02-15 02:15:23,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1372142945] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:23,110 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:23,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:15:23,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808650788] [2022-02-15 02:15:23,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:23,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:15:23,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:23,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:15:23,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:15:23,111 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:15:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:23,259 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-02-15 02:15:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:15:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-02-15 02:15:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:23,260 INFO L225 Difference]: With dead ends: 59 [2022-02-15 02:15:23,260 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 02:15:23,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:15:23,261 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:23,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 37 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:15:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 02:15:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-02-15 02:15:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:15:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-02-15 02:15:23,269 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 35 [2022-02-15 02:15:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:23,269 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-02-15 02:15:23,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:15:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-02-15 02:15:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 02:15:23,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:23,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:23,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:15:23,270 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:23,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:23,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1737418839, now seen corresponding path program 1 times [2022-02-15 02:15:23,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:23,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562375237] [2022-02-15 02:15:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:23,327 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:23,327 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:15:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,443 INFO 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 02:15:23,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:23,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562375237] [2022-02-15 02:15:23,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1562375237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:23,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:23,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:15:23,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634466634] [2022-02-15 02:15:23,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:23,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:15:23,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:23,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:15:23,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:15:23,478 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:23,815 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-02-15 02:15:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:15:23,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-02-15 02:15:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:23,816 INFO L225 Difference]: With dead ends: 58 [2022-02-15 02:15:23,816 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 02:15:23,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:15:23,817 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:23,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 73 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:15:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 02:15:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-02-15 02:15:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-15 02:15:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-02-15 02:15:23,825 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 35 [2022-02-15 02:15:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:23,825 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-02-15 02:15:23,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-02-15 02:15:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 02:15:23,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:23,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:23,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:15:23,826 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1597979675, now seen corresponding path program 3 times [2022-02-15 02:15:23,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:23,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253070980] [2022-02-15 02:15:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:23,875 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:23,875 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:23,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:24,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:15:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:24,198 INFO 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 02:15:45,962 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:45,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253070980] [2022-02-15 02:15:45,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [253070980] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:45,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:45,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:15:45,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646522149] [2022-02-15 02:15:45,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:45,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:15:45,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:15:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=431, Unknown=7, NotChecked=0, Total=506 [2022-02-15 02:15:45,964 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:53,112 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-02-15 02:15:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:15:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-02-15 02:15:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:53,114 INFO L225 Difference]: With dead ends: 75 [2022-02-15 02:15:53,114 INFO L226 Difference]: Without dead ends: 69 [2022-02-15 02:15:53,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=143, Invalid=1039, Unknown=8, NotChecked=0, Total=1190 [2022-02-15 02:15:53,115 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:53,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 89 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 385 Invalid, 0 Unknown, 68 Unchecked, 1.6s Time] [2022-02-15 02:15:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-15 02:15:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2022-02-15 02:15:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 49 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-15 02:15:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-02-15 02:15:53,128 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 37 [2022-02-15 02:15:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:53,128 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-02-15 02:15:53,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:15:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-02-15 02:15:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 02:15:53,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:53,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:53,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:15:53,129 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:53,130 INFO L85 PathProgramCache]: Analyzing trace with hash 783907799, now seen corresponding path program 2 times [2022-02-15 02:15:53,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:53,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608238254] [2022-02-15 02:15:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:53,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:53,286 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:53,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:53,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:15:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:53,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:15:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:54,822 INFO 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 02:16:02,532 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:02,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608238254] [2022-02-15 02:16:02,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [608238254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:02,532 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:02,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:16:02,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28794515] [2022-02-15 02:16:02,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:02,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 02:16:02,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:02,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 02:16:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=473, Unknown=3, NotChecked=0, Total=552 [2022-02-15 02:16:02,533 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 22 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:16:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:11,975 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-02-15 02:16:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:16:11,976 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-02-15 02:16:11,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:11,977 INFO L225 Difference]: With dead ends: 66 [2022-02-15 02:16:11,977 INFO L226 Difference]: Without dead ends: 52 [2022-02-15 02:16:11,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=179, Invalid=1147, Unknown=6, NotChecked=0, Total=1332 [2022-02-15 02:16:11,978 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:11,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 79 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 316 Invalid, 0 Unknown, 95 Unchecked, 1.4s Time] [2022-02-15 02:16:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-15 02:16:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-02-15 02:16:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:16:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-02-15 02:16:11,990 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 37 [2022-02-15 02:16:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:11,990 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-02-15 02:16:11,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:16:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-02-15 02:16:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 02:16:11,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:11,992 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:16:11,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:16:11,992 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:11,993 INFO L85 PathProgramCache]: Analyzing trace with hash 606915741, now seen corresponding path program 4 times [2022-02-15 02:16:11,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:11,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142759501] [2022-02-15 02:16:11,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:12,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:12,275 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:16:12,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:12,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:12,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:16:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:12,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:16:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:13,895 INFO 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 02:16:15,116 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:15,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142759501] [2022-02-15 02:16:15,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2142759501] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:15,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:15,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:16:15,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844713492] [2022-02-15 02:16:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:15,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 02:16:15,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 02:16:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:16:15,117 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:16:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:20,125 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-02-15 02:16:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:16:20,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-02-15 02:16:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:20,126 INFO L225 Difference]: With dead ends: 65 [2022-02-15 02:16:20,126 INFO L226 Difference]: Without dead ends: 55 [2022-02-15 02:16:20,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=147, Invalid=1112, Unknown=1, NotChecked=0, Total=1260 [2022-02-15 02:16:20,127 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:20,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 62 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 338 Invalid, 0 Unknown, 24 Unchecked, 1.5s Time] [2022-02-15 02:16:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-15 02:16:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-02-15 02:16:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:16:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-02-15 02:16:20,144 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 39 [2022-02-15 02:16:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:20,145 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-02-15 02:16:20,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:16:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-02-15 02:16:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 02:16:20,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:20,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:16:20,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:16:20,145 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1449963591, now seen corresponding path program 5 times [2022-02-15 02:16:20,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:20,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118026398] [2022-02-15 02:16:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:20,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:20,318 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:16:20,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:20,479 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:16:20,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:20,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:16:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:21,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:16:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:22,035 INFO 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 02:16:34,031 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:34,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118026398] [2022-02-15 02:16:34,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [118026398] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:34,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:34,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 02:16:34,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869212864] [2022-02-15 02:16:34,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:34,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:16:34,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:16:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=513, Unknown=5, NotChecked=0, Total=600 [2022-02-15 02:16:34,033 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:16:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:41,352 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-02-15 02:16:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:16:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-02-15 02:16:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:41,353 INFO L225 Difference]: With dead ends: 62 [2022-02-15 02:16:41,353 INFO L226 Difference]: Without dead ends: 52 [2022-02-15 02:16:41,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=150, Invalid=1103, Unknown=7, NotChecked=0, Total=1260 [2022-02-15 02:16:41,354 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:41,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 107 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 457 Invalid, 0 Unknown, 94 Unchecked, 1.9s Time] [2022-02-15 02:16:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-15 02:16:41,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-02-15 02:16:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:16:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-02-15 02:16:41,365 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2022-02-15 02:16:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:41,365 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-02-15 02:16:41,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:16:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-02-15 02:16:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 02:16:41,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:41,365 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:16:41,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:16:41,366 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:41,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1677214879, now seen corresponding path program 6 times [2022-02-15 02:16:41,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:41,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656776667] [2022-02-15 02:16:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:41,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:41,549 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:16:41,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:41,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:41,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:16:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:42,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:16:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:43,413 INFO 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 02:16:44,765 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:44,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656776667] [2022-02-15 02:16:44,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656776667] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:44,766 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:44,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 02:16:44,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879950213] [2022-02-15 02:16:44,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:44,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:16:44,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:16:44,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:16:44,767 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:16:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:49,813 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-02-15 02:16:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:16:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-02-15 02:16:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:49,815 INFO L225 Difference]: With dead ends: 55 [2022-02-15 02:16:49,815 INFO L226 Difference]: Without dead ends: 45 [2022-02-15 02:16:49,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=152, Invalid=1253, Unknown=1, NotChecked=0, Total=1406 [2022-02-15 02:16:49,816 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:49,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 90 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 326 Invalid, 0 Unknown, 79 Unchecked, 1.4s Time] [2022-02-15 02:16:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-15 02:16:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-02-15 02:16:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:16:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-02-15 02:16:49,830 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2022-02-15 02:16:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:49,831 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-02-15 02:16:49,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:16:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-02-15 02:16:49,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:16:49,832 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:49,832 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:16:49,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:16:49,832 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:49,832 INFO L85 PathProgramCache]: Analyzing trace with hash -557464543, now seen corresponding path program 7 times [2022-02-15 02:16:49,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:49,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636385167] [2022-02-15 02:16:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:50,079 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:50,079 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:16:50,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:50,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:50,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:16:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:50,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:16:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:52,123 INFO 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 02:16:59,593 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:59,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636385167] [2022-02-15 02:16:59,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [636385167] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:59,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:59,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:16:59,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767763712] [2022-02-15 02:16:59,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:59,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:16:59,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:59,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:16:59,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=569, Unknown=3, NotChecked=0, Total=650 [2022-02-15 02:16:59,594 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:17:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:05,321 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-02-15 02:17:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:17:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-02-15 02:17:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:05,322 INFO L225 Difference]: With dead ends: 57 [2022-02-15 02:17:05,323 INFO L226 Difference]: Without dead ends: 47 [2022-02-15 02:17:05,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=164, Invalid=1392, Unknown=4, NotChecked=0, Total=1560 [2022-02-15 02:17:05,325 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:05,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 105 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 462 Invalid, 0 Unknown, 83 Unchecked, 1.9s Time] [2022-02-15 02:17:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-15 02:17:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-02-15 02:17:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:17:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-02-15 02:17:05,335 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2022-02-15 02:17:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:05,335 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-02-15 02:17:05,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:17:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-02-15 02:17:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 02:17:05,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:05,336 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:17:05,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:17:05,336 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:05,336 INFO L85 PathProgramCache]: Analyzing trace with hash -600741085, now seen corresponding path program 8 times [2022-02-15 02:17:05,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:05,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861063916] [2022-02-15 02:17:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:05,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:05,536 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:17:05,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:05,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:05,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:17:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:06,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:17:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:07,858 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 02:17:29,783 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:29,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861063916] [2022-02-15 02:17:29,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861063916] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:29,783 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:29,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:17:29,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79211412] [2022-02-15 02:17:29,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:29,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:17:29,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:17:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=615, Unknown=7, NotChecked=0, Total=702 [2022-02-15 02:17:29,784 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:17:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:38,070 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2022-02-15 02:17:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:17:38,070 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-02-15 02:17:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:38,071 INFO L225 Difference]: With dead ends: 69 [2022-02-15 02:17:38,071 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 02:17:38,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=172, Invalid=1542, Unknown=8, NotChecked=0, Total=1722 [2022-02-15 02:17:38,072 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:38,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 91 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 555 Invalid, 0 Unknown, 60 Unchecked, 2.3s Time] [2022-02-15 02:17:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 02:17:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-02-15 02:17:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:17:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-02-15 02:17:38,088 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 45 [2022-02-15 02:17:38,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:38,088 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-02-15 02:17:38,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:17:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-02-15 02:17:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 02:17:38,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:38,089 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:17:38,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:17:38,089 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:38,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:38,089 INFO L85 PathProgramCache]: Analyzing trace with hash 760175013, now seen corresponding path program 9 times [2022-02-15 02:17:38,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:38,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23027712] [2022-02-15 02:17:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:38,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:38,272 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:17:38,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:38,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:38,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:17:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:38,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:17:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:40,681 INFO 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 02:17:48,040 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:17:48,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23027712] [2022-02-15 02:17:48,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [23027712] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:17:48,040 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:17:48,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:17:48,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576329349] [2022-02-15 02:17:48,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:17:48,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 02:17:48,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:17:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 02:17:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=669, Unknown=3, NotChecked=0, Total=756 [2022-02-15 02:17:48,041 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:17:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:17:55,181 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-02-15 02:17:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:17:55,182 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-02-15 02:17:55,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:17:55,183 INFO L225 Difference]: With dead ends: 73 [2022-02-15 02:17:55,183 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 02:17:55,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=182, Invalid=1706, Unknown=4, NotChecked=0, Total=1892 [2022-02-15 02:17:55,184 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:17:55,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 122 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 699 Invalid, 0 Unknown, 144 Unchecked, 2.9s Time] [2022-02-15 02:17:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 02:17:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-02-15 02:17:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:17:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-02-15 02:17:55,201 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 47 [2022-02-15 02:17:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:17:55,201 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-02-15 02:17:55,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:17:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-02-15 02:17:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 02:17:55,202 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:17:55,202 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:17:55,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:17:55,202 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:17:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:17:55,202 INFO L85 PathProgramCache]: Analyzing trace with hash 687800513, now seen corresponding path program 10 times [2022-02-15 02:17:55,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:17:55,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822578908] [2022-02-15 02:17:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:17:55,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:55,370 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:17:55,605 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:17:55,605 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:17:55,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:17:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:55,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:17:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:55,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:17:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:56,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:17:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:17:57,913 INFO 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 02:18:03,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:18:03,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822578908] [2022-02-15 02:18:03,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822578908] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:18:03,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:18:03,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:18:03,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202847040] [2022-02-15 02:18:03,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:18:03,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:18:03,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:18:03,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:18:03,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=716, Unknown=2, NotChecked=0, Total=812 [2022-02-15 02:18:03,719 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:18:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:18:11,648 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-02-15 02:18:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:18:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-02-15 02:18:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:18:11,650 INFO L225 Difference]: With dead ends: 70 [2022-02-15 02:18:11,650 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 02:18:11,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=183, Invalid=1705, Unknown=4, NotChecked=0, Total=1892 [2022-02-15 02:18:11,651 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:18:11,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 85 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 445 Invalid, 0 Unknown, 105 Unchecked, 2.0s Time] [2022-02-15 02:18:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 02:18:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2022-02-15 02:18:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:18:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-02-15 02:18:11,665 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2022-02-15 02:18:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:18:11,665 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-02-15 02:18:11,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:18:11,665 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-02-15 02:18:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:18:11,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:18:11,666 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:18:11,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:18:11,666 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:18:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:18:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1364480089, now seen corresponding path program 11 times [2022-02-15 02:18:11,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:18:11,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671157684] [2022-02-15 02:18:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:18:11,828 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:18:11,829 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:18:11,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:18:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:11,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:18:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:18:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:12,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:18:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:14,531 INFO 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 02:18:15,869 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:18:15,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671157684] [2022-02-15 02:18:15,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671157684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:18:15,870 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:18:15,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:18:15,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325752886] [2022-02-15 02:18:15,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:18:15,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:18:15,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:18:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:18:15,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:18:15,871 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 27 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:18:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:18:22,844 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2022-02-15 02:18:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:18:22,845 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-02-15 02:18:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:18:22,845 INFO L225 Difference]: With dead ends: 63 [2022-02-15 02:18:22,845 INFO L226 Difference]: Without dead ends: 53 [2022-02-15 02:18:22,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=191, Invalid=1878, Unknown=1, NotChecked=0, Total=2070 [2022-02-15 02:18:22,846 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:18:22,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 95 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 637 Invalid, 0 Unknown, 96 Unchecked, 2.6s Time] [2022-02-15 02:18:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-15 02:18:22,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-02-15 02:18:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:18:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-02-15 02:18:22,859 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2022-02-15 02:18:22,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:18:22,859 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-02-15 02:18:22,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:18:22,860 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-02-15 02:18:22,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 02:18:22,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:18:22,860 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:18:22,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:18:22,860 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:18:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:18:22,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1246399785, now seen corresponding path program 12 times [2022-02-15 02:18:22,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:18:22,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975432334] [2022-02-15 02:18:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:18:23,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:18:23,025 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:18:23,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:18:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:23,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:18:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:18:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:23,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:18:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:25,806 INFO 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 02:18:33,252 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:18:33,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975432334] [2022-02-15 02:18:33,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [975432334] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:18:33,253 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:18:33,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:18:33,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014978662] [2022-02-15 02:18:33,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:18:33,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:18:33,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:18:33,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:18:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=777, Unknown=3, NotChecked=0, Total=870 [2022-02-15 02:18:33,254 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:18:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:18:40,732 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-02-15 02:18:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:18:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-02-15 02:18:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:18:40,733 INFO L225 Difference]: With dead ends: 65 [2022-02-15 02:18:40,733 INFO L226 Difference]: Without dead ends: 55 [2022-02-15 02:18:40,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=200, Invalid=2052, Unknown=4, NotChecked=0, Total=2256 [2022-02-15 02:18:40,734 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:18:40,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 90 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 676 Invalid, 0 Unknown, 62 Unchecked, 2.8s Time] [2022-02-15 02:18:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-15 02:18:40,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-02-15 02:18:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:18:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-02-15 02:18:40,748 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2022-02-15 02:18:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:18:40,748 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-02-15 02:18:40,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:18:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-02-15 02:18:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 02:18:40,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:18:40,748 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:18:40,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 02:18:40,749 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:18:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:18:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2041057835, now seen corresponding path program 13 times [2022-02-15 02:18:40,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:18:40,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444237432] [2022-02-15 02:18:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:18:40,981 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:18:40,981 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:18:40,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:18:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:41,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:18:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:41,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:18:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:41,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:18:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:18:43,971 INFO 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 02:19:03,616 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:19:03,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444237432] [2022-02-15 02:19:03,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444237432] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:19:03,616 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:19:03,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:19:03,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228866100] [2022-02-15 02:19:03,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:19:03,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:19:03,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:19:03,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:19:03,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=831, Unknown=7, NotChecked=0, Total=930 [2022-02-15 02:19:03,617 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 29 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:19:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:19:13,774 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2022-02-15 02:19:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:19:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-02-15 02:19:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:19:13,776 INFO L225 Difference]: With dead ends: 77 [2022-02-15 02:19:13,776 INFO L226 Difference]: Without dead ends: 71 [2022-02-15 02:19:13,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=205, Invalid=2237, Unknown=8, NotChecked=0, Total=2450 [2022-02-15 02:19:13,777 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:19:13,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 131 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 801 Invalid, 0 Unknown, 178 Unchecked, 3.4s Time] [2022-02-15 02:19:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-15 02:19:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-02-15 02:19:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 58 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:19:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-02-15 02:19:13,804 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 53 [2022-02-15 02:19:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:19:13,804 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-02-15 02:19:13,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:19:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-02-15 02:19:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:19:13,807 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:19:13,807 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:19:13,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:19:13,807 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:19:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:19:13,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1203265197, now seen corresponding path program 14 times [2022-02-15 02:19:13,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:19:13,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116730536] [2022-02-15 02:19:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:19:14,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:19:14,067 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:19:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:19:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:19:14,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:19:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:19:14,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:19:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:19:14,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:19:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:19:17,372 INFO 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 02:19:25,278 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:19:25,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116730536] [2022-02-15 02:19:25,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116730536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:19:25,279 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:19:25,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:19:25,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127631048] [2022-02-15 02:19:25,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:19:25,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:19:25,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:19:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:19:25,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=893, Unknown=3, NotChecked=0, Total=992 [2022-02-15 02:19:25,280 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 30 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:19:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:19:33,817 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-02-15 02:19:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:19:33,817 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-02-15 02:19:33,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:19:33,818 INFO L225 Difference]: With dead ends: 81 [2022-02-15 02:19:33,818 INFO L226 Difference]: Without dead ends: 71 [2022-02-15 02:19:33,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=218, Invalid=2430, Unknown=4, NotChecked=0, Total=2652 [2022-02-15 02:19:33,819 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:19:33,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 82 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 883 Invalid, 0 Unknown, 124 Unchecked, 3.6s Time] [2022-02-15 02:19:33,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-15 02:19:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-02-15 02:19:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:19:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-02-15 02:19:33,841 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 55 [2022-02-15 02:19:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:19:33,841 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-02-15 02:19:33,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:19:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-02-15 02:19:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:19:33,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:19:33,842 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:19:33,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:19:33,842 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:19:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:19:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash 5056969, now seen corresponding path program 15 times [2022-02-15 02:19:33,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:19:33,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143609989] [2022-02-15 02:19:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:19:33,984 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:19:33,985 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:19:34,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:19:34,193 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:19:34,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:19:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:19:34,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:19:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:19:34,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:19:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:19:34,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:19:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:19:37,318 INFO 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 02:20:21,692 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:20:21,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143609989] [2022-02-15 02:20:21,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2143609989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:20:21,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:20:21,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:20:21,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273137804] [2022-02-15 02:20:21,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:20:21,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:20:21,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:20:21,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:20:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=937, Unknown=16, NotChecked=0, Total=1056 [2022-02-15 02:20:21,694 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:20:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:20:39,647 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2022-02-15 02:20:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:20:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-02-15 02:20:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:20:39,648 INFO L225 Difference]: With dead ends: 78 [2022-02-15 02:20:39,649 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 02:20:39,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=219, Invalid=2415, Unknown=18, NotChecked=0, Total=2652 [2022-02-15 02:20:39,650 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:20:39,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 100 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 664 Invalid, 0 Unknown, 176 Unchecked, 2.8s Time] [2022-02-15 02:20:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 02:20:39,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2022-02-15 02:20:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:20:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-02-15 02:20:39,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2022-02-15 02:20:39,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:20:39,673 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-02-15 02:20:39,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:20:39,673 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-02-15 02:20:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 02:20:39,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:20:39,674 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:20:39,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:20:39,674 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:20:39,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:20:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash -756575569, now seen corresponding path program 16 times [2022-02-15 02:20:39,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:20:39,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479081832] [2022-02-15 02:20:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:20:39,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:20:39,936 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:20:39,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:20:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:20:40,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:20:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:20:40,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:20:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:20:40,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:20:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:20:43,471 INFO 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 02:21:05,025 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:21:05,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479081832] [2022-02-15 02:21:05,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [479081832] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:21:05,026 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:21:05,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:21:05,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573817647] [2022-02-15 02:21:05,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:21:05,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:21:05,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:21:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:21:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=951, Unknown=7, NotChecked=0, Total=1056 [2022-02-15 02:21:05,027 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:21:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:21:16,089 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-02-15 02:21:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:21:16,089 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-02-15 02:21:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:21:16,090 INFO L225 Difference]: With dead ends: 81 [2022-02-15 02:21:16,090 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 02:21:16,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=226, Invalid=2628, Unknown=8, NotChecked=0, Total=2862 [2022-02-15 02:21:16,091 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:21:16,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 111 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 997 Invalid, 0 Unknown, 67 Unchecked, 4.0s Time] [2022-02-15 02:21:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 02:21:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-02-15 02:21:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 62 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:21:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-02-15 02:21:16,118 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 57 [2022-02-15 02:21:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:21:16,118 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-02-15 02:21:16,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:21:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-02-15 02:21:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 02:21:16,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:21:16,119 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:21:16,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:21:16,119 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:21:16,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:21:16,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1327091249, now seen corresponding path program 17 times [2022-02-15 02:21:16,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:21:16,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451907841] [2022-02-15 02:21:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:21:16,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:21:16,378 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:21:16,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:21:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:21:16,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:21:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:21:16,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:21:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:21:17,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:21:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:21:20,128 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 02:21:41,812 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:21:41,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451907841] [2022-02-15 02:21:41,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [451907841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:21:41,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:21:41,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:21:41,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411370225] [2022-02-15 02:21:41,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:21:41,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:21:41,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:21:41,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:21:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1014, Unknown=7, NotChecked=0, Total=1122 [2022-02-15 02:21:41,814 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 32 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:21:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:21:53,050 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-02-15 02:21:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:21:53,051 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-02-15 02:21:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:21:53,052 INFO L225 Difference]: With dead ends: 87 [2022-02-15 02:21:53,052 INFO L226 Difference]: Without dead ends: 81 [2022-02-15 02:21:53,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=235, Invalid=2837, Unknown=8, NotChecked=0, Total=3080 [2022-02-15 02:21:53,053 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:21:53,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 63 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 953 Invalid, 0 Unknown, 134 Unchecked, 3.8s Time] [2022-02-15 02:21:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-15 02:21:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-02-15 02:21:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:21:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2022-02-15 02:21:53,079 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 59 [2022-02-15 02:21:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:21:53,079 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2022-02-15 02:21:53,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:21:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2022-02-15 02:21:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 02:21:53,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:21:53,080 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:21:53,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:21:53,080 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:21:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:21:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash -874796211, now seen corresponding path program 18 times [2022-02-15 02:21:53,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:21:53,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870739046] [2022-02-15 02:21:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:21:53,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:21:53,227 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:21:53,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:21:53,445 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:21:53,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:21:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:21:53,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:21:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:21:53,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:21:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:21:54,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:21:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:21:57,008 INFO 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 02:22:38,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:22:38,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870739046] [2022-02-15 02:22:38,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1870739046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:22:38,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:22:38,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:22:38,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623218515] [2022-02-15 02:22:38,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:22:38,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:22:38,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:22:38,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:22:38,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1065, Unknown=15, NotChecked=0, Total=1190 [2022-02-15 02:22:38,363 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:22:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:22:51,478 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-02-15 02:22:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:22:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-02-15 02:22:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:22:51,479 INFO L225 Difference]: With dead ends: 86 [2022-02-15 02:22:51,479 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 02:22:51,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=238, Invalid=2825, Unknown=17, NotChecked=0, Total=3080 [2022-02-15 02:22:51,481 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:22:51,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 111 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 955 Invalid, 0 Unknown, 182 Unchecked, 3.9s Time] [2022-02-15 02:22:51,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 02:22:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-02-15 02:22:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:22:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-02-15 02:22:51,509 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 59 [2022-02-15 02:22:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:22:51,509 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-02-15 02:22:51,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:22:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-02-15 02:22:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:22:51,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:22:51,509 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:22:51,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:22:51,510 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:22:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:22:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2018823885, now seen corresponding path program 19 times [2022-02-15 02:22:51,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:22:51,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784624690] [2022-02-15 02:22:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:22:51,765 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:22:51,766 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:22:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:22:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:51,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:22:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:51,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:22:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:52,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:22:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:22:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:23:17,384 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:23:17,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784624690] [2022-02-15 02:23:17,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [784624690] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:23:17,385 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:23:17,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:23:17,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734251224] [2022-02-15 02:23:17,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:23:17,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:23:17,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:23:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:23:17,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1079, Unknown=7, NotChecked=0, Total=1190 [2022-02-15 02:23:17,386 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 33 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:23:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:23:29,711 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-02-15 02:23:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:23:29,711 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-02-15 02:23:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:23:29,712 INFO L225 Difference]: With dead ends: 89 [2022-02-15 02:23:29,712 INFO L226 Difference]: Without dead ends: 83 [2022-02-15 02:23:29,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=244, Invalid=3054, Unknown=8, NotChecked=0, Total=3306 [2022-02-15 02:23:29,713 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:23:29,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 93 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1055 Invalid, 0 Unknown, 142 Unchecked, 4.5s Time] [2022-02-15 02:23:29,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-15 02:23:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2022-02-15 02:23:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.078125) internal successors, (69), 66 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:23:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-02-15 02:23:29,741 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 61 [2022-02-15 02:23:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:23:29,741 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-02-15 02:23:29,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:23:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-02-15 02:23:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:23:29,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:23:29,742 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:23:29,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 02:23:29,742 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:23:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:23:29,742 INFO L85 PathProgramCache]: Analyzing trace with hash -613796017, now seen corresponding path program 20 times [2022-02-15 02:23:29,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:23:29,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033881138] [2022-02-15 02:23:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:23:29,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:23:29,982 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:23:30,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:23:30,152 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:23:30,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:23:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:23:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:23:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:30,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:23:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:23:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:24:14,234 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:24:14,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033881138] [2022-02-15 02:24:14,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2033881138] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:24:14,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:24:14,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:24:14,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877699702] [2022-02-15 02:24:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:24:14,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:24:14,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:24:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:24:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1132, Unknown=15, NotChecked=0, Total=1260 [2022-02-15 02:24:14,237 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 34 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:24:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:24:28,232 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-02-15 02:24:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:24:28,232 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-02-15 02:24:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:24:28,233 INFO L225 Difference]: With dead ends: 88 [2022-02-15 02:24:28,233 INFO L226 Difference]: Without dead ends: 78 [2022-02-15 02:24:28,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=247, Invalid=3042, Unknown=17, NotChecked=0, Total=3306 [2022-02-15 02:24:28,234 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:24:28,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 148 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1100 Invalid, 0 Unknown, 177 Unchecked, 4.5s Time] [2022-02-15 02:24:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-15 02:24:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-02-15 02:24:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.0625) internal successors, (68), 66 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:24:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-02-15 02:24:28,263 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 61 [2022-02-15 02:24:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:24:28,263 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-02-15 02:24:28,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:24:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-02-15 02:24:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 02:24:28,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:24:28,264 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:24:28,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 02:24:28,264 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:24:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:24:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash -512762955, now seen corresponding path program 21 times [2022-02-15 02:24:28,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:24:28,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628695057] [2022-02-15 02:24:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:24:28,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:24:28,411 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:24:28,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:24:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:28,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:24:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:28,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:24:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:29,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:24:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:24:32,672 INFO 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 02:24:52,483 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:24:52,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628695057] [2022-02-15 02:24:52,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628695057] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:24:52,483 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:24:52,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:24:52,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985359599] [2022-02-15 02:24:52,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:24:52,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:24:52,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:24:52,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:24:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1146, Unknown=7, NotChecked=0, Total=1260 [2022-02-15 02:24:52,485 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 34 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:25:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:25:04,686 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-02-15 02:25:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:25:04,687 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-02-15 02:25:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:25:04,687 INFO L225 Difference]: With dead ends: 91 [2022-02-15 02:25:04,687 INFO L226 Difference]: Without dead ends: 85 [2022-02-15 02:25:04,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=250, Invalid=3282, Unknown=8, NotChecked=0, Total=3540 [2022-02-15 02:25:04,688 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:25:04,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 103 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1094 Invalid, 0 Unknown, 204 Unchecked, 4.4s Time] [2022-02-15 02:25:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-15 02:25:04,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-02-15 02:25:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 68 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:25:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2022-02-15 02:25:04,718 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 63 [2022-02-15 02:25:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:25:04,718 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2022-02-15 02:25:04,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:25:04,718 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2022-02-15 02:25:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 02:25:04,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:25:04,719 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:25:04,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 02:25:04,719 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:25:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:25:04,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1099287249, now seen corresponding path program 22 times [2022-02-15 02:25:04,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:25:04,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609844564] [2022-02-15 02:25:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:25:04,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:25:04,868 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:25:05,029 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:25:05,030 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:25:05,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:25:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:05,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:25:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:05,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:25:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:05,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:25:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:25:09,009 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 02:25:53,292 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:25:53,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609844564] [2022-02-15 02:25:53,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1609844564] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:25:53,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:25:53,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:25:53,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280818712] [2022-02-15 02:25:53,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:25:53,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:25:53,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:25:53,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:25:53,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1201, Unknown=16, NotChecked=0, Total=1332 [2022-02-15 02:25:53,294 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 35 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:26:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:26:07,463 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-02-15 02:26:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:26:07,463 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-02-15 02:26:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:26:07,464 INFO L225 Difference]: With dead ends: 90 [2022-02-15 02:26:07,464 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 02:26:07,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=255, Invalid=3267, Unknown=18, NotChecked=0, Total=3540 [2022-02-15 02:26:07,465 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:26:07,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 96 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1055 Invalid, 0 Unknown, 144 Unchecked, 4.4s Time] [2022-02-15 02:26:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 02:26:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-02-15 02:26:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 68 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:26:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-02-15 02:26:07,496 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 63 [2022-02-15 02:26:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:26:07,496 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-02-15 02:26:07,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:26:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-02-15 02:26:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 02:26:07,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:26:07,496 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:26:07,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 02:26:07,497 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:26:07,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:26:07,497 INFO L85 PathProgramCache]: Analyzing trace with hash -592187977, now seen corresponding path program 23 times [2022-02-15 02:26:07,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:26:07,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051666317] [2022-02-15 02:26:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:26:07,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:26:07,748 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:26:07,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:26:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:26:07,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:26:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:26:07,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:26:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:26:08,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:26:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:26:12,343 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 02:26:34,170 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:26:34,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051666317] [2022-02-15 02:26:34,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1051666317] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:26:34,170 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:26:34,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:26:34,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155988746] [2022-02-15 02:26:34,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:26:34,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:26:34,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:26:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:26:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1215, Unknown=7, NotChecked=0, Total=1332 [2022-02-15 02:26:34,171 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 35 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:26:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:26:49,025 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-02-15 02:26:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:26:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-02-15 02:26:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:26:49,027 INFO L225 Difference]: With dead ends: 93 [2022-02-15 02:26:49,027 INFO L226 Difference]: Without dead ends: 87 [2022-02-15 02:26:49,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=262, Invalid=3512, Unknown=8, NotChecked=0, Total=3782 [2022-02-15 02:26:49,028 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 95 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:26:49,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 128 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1509 Invalid, 0 Unknown, 144 Unchecked, 6.4s Time] [2022-02-15 02:26:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-15 02:26:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2022-02-15 02:26:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 70 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:26:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-02-15 02:26:49,076 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 65 [2022-02-15 02:26:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:26:49,076 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-02-15 02:26:49,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:26:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-02-15 02:26:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 02:26:49,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:26:49,077 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:26:49,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 02:26:49,077 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:26:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:26:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1895135789, now seen corresponding path program 24 times [2022-02-15 02:26:49,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:26:49,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531494174] [2022-02-15 02:26:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:26:49,363 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:26:49,364 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:26:49,528 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:26:49,528 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:26:49,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:26:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:26:49,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:26:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:26:49,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:26:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:26:50,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:26:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:26:54,017 INFO 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 02:27:36,715 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:27:36,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531494174] [2022-02-15 02:27:36,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [531494174] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:27:36,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:27:36,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:27:36,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966128140] [2022-02-15 02:27:36,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:27:36,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:27:36,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:27:36,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:27:36,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1272, Unknown=17, NotChecked=0, Total=1406 [2022-02-15 02:27:36,716 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:27:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:27:52,229 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-02-15 02:27:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:27:52,229 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-02-15 02:27:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:27:52,230 INFO L225 Difference]: With dead ends: 92 [2022-02-15 02:27:52,230 INFO L226 Difference]: Without dead ends: 82 [2022-02-15 02:27:52,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 54.1s TimeCoverageRelationStatistics Valid=268, Invalid=3619, Unknown=19, NotChecked=0, Total=3906 [2022-02-15 02:27:52,231 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 75 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:27:52,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 173 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1434 Invalid, 0 Unknown, 281 Unchecked, 5.6s Time] [2022-02-15 02:27:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-15 02:27:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-02-15 02:27:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 70 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:27:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-02-15 02:27:52,273 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 65 [2022-02-15 02:27:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:27:52,273 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-02-15 02:27:52,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:27:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-02-15 02:27:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:27:52,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:27:52,274 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:27:52,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 02:27:52,274 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:27:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:27:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash 389777209, now seen corresponding path program 25 times [2022-02-15 02:27:52,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:27:52,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526008794] [2022-02-15 02:27:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:27:52,427 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:27:52,427 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:27:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:27:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:52,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:27:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:52,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:27:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:53,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:27:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:27:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:28:15,029 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:28:15,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526008794] [2022-02-15 02:28:15,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [526008794] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:28:15,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:28:15,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:28:15,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650238809] [2022-02-15 02:28:15,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:28:15,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:28:15,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:28:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:28:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1288, Unknown=4, NotChecked=0, Total=1406 [2022-02-15 02:28:15,031 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 36 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:28:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:28:29,897 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-02-15 02:28:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:28:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-02-15 02:28:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:28:29,898 INFO L225 Difference]: With dead ends: 93 [2022-02-15 02:28:29,898 INFO L226 Difference]: Without dead ends: 83 [2022-02-15 02:28:29,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=269, Invalid=3758, Unknown=5, NotChecked=0, Total=4032 [2022-02-15 02:28:29,899 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:28:29,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 152 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1498 Invalid, 0 Unknown, 139 Unchecked, 6.4s Time] [2022-02-15 02:28:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-15 02:28:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-02-15 02:28:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 72 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-15 02:28:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-02-15 02:28:29,935 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 67 [2022-02-15 02:28:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:28:29,935 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-02-15 02:28:29,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:28:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-02-15 02:28:29,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:28:29,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:28:29,936 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:28:29,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 02:28:29,936 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:28:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:28:29,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1907586987, now seen corresponding path program 26 times [2022-02-15 02:28:29,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:28:29,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079076846] [2022-02-15 02:28:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:28:30,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:28:30,116 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:28:30,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:28:30,295 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:28:30,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:28:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:28:30,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:28:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:28:30,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:28:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:28:31,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:28:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:28:35,074 INFO 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 02:29:17,923 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:29:17,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079076846] [2022-02-15 02:29:17,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1079076846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:29:17,924 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:29:17,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:29:17,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244051021] [2022-02-15 02:29:17,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:29:17,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:29:17,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:29:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:29:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1345, Unknown=16, NotChecked=0, Total=1482 [2022-02-15 02:29:17,925 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 37 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:29:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:29:35,283 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-02-15 02:29:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:29:35,284 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-02-15 02:29:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:29:35,285 INFO L225 Difference]: With dead ends: 90 [2022-02-15 02:29:35,285 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 02:29:35,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 55.2s TimeCoverageRelationStatistics Valid=273, Invalid=3741, Unknown=18, NotChecked=0, Total=4032 [2022-02-15 02:29:35,286 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:29:35,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 146 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1488 Invalid, 0 Unknown, 78 Unchecked, 6.7s Time] [2022-02-15 02:29:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 02:29:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-02-15 02:29:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:29:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-02-15 02:29:35,336 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2022-02-15 02:29:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:29:35,337 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-02-15 02:29:35,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:29:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-02-15 02:29:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:29:35,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:29:35,337 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:29:35,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 02:29:35,338 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:29:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:29:35,338 INFO L85 PathProgramCache]: Analyzing trace with hash -834484165, now seen corresponding path program 27 times [2022-02-15 02:29:35,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:29:35,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894009582] [2022-02-15 02:29:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:29:35,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:29:35,553 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:29:35,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:29:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:29:35,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:29:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:29:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:29:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:29:36,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:29:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat