/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/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:36:53,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:36:53,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:36:53,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:36:53,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:36:53,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:36:53,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:36:53,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:36:53,730 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:36:53,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:36:53,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:36:53,732 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:36:53,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:36:53,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:36:53,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:36:53,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:36:53,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:36:53,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:36:53,734 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:36:53,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:36:53,734 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:36:53,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:36:53,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:36:53,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:36:53,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:36:53,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:36:53,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:36:53,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:36:53,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:36:53,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:36:53,736 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:36:53,736 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:36:53,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:36:54,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:36:54,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:36:54,016 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:36:54,017 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:36:54,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2022-02-15 01:36:54,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1b2af1bb/95d8b29145bf4e33aa528de46d39d28d/FLAGce1e1d21a [2022-02-15 01:36:54,429 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:36:54,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2022-02-15 01:36:54,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1b2af1bb/95d8b29145bf4e33aa528de46d39d28d/FLAGce1e1d21a [2022-02-15 01:36:54,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1b2af1bb/95d8b29145bf4e33aa528de46d39d28d [2022-02-15 01:36:54,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:36:54,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:36:54,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:36:54,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:36:54,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:36:54,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1afdde01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54, skipping insertion in model container [2022-02-15 01:36:54,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:36:54,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:36:54,658 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i[895,908] [2022-02-15 01:36:54,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:36:54,676 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:36:54,686 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i[895,908] [2022-02-15 01:36:54,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:36:54,699 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:36:54,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54 WrapperNode [2022-02-15 01:36:54,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:36:54,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:36:54,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:36:54,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:36:54,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:36:54,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:36:54,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:36:54,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:36:54,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54" (1/1) ... [2022-02-15 01:36:54,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:36:54,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:36:54,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:36:54,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:36:54,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:36:54,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:36:54,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:36:54,792 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 01:36:54,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:36:54,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:36:54,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:36:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:36:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:36:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:36:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:36:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:36:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 01:36:54,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:36:54,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:36:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:36:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:36:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:36:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:36:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:36:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:36:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:36:54,846 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:36:54,847 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:36:54,941 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:36:54,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:36:54,945 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 01:36:54,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:36:54 BoogieIcfgContainer [2022-02-15 01:36:54,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:36:54,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:36:54,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:36:54,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:36:54,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:36:54" (1/3) ... [2022-02-15 01:36:54,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d811498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:36:54, skipping insertion in model container [2022-02-15 01:36:54,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:36:54" (2/3) ... [2022-02-15 01:36:54,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d811498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:36:54, skipping insertion in model container [2022-02-15 01:36:54,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:36:54" (3/3) ... [2022-02-15 01:36:54,964 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2022-02-15 01:36:54,968 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:36:54,969 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:36:55,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:36:55,059 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:36:55,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:36:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:36:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 01:36:55,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:55,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:55,080 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:55,085 INFO L85 PathProgramCache]: Analyzing trace with hash -915508507, now seen corresponding path program 1 times [2022-02-15 01:36:55,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:55,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779508657] [2022-02-15 01:36:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:55,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:55,135 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:36:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:55,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:55,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:55,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779508657] [2022-02-15 01:36:55,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779508657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:55,253 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:55,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:36:55,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718981380] [2022-02-15 01:36:55,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:55,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:36:55,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:55,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:36:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:36:55,279 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:55,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:55,329 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-02-15 01:36:55,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:36:55,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-15 01:36:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:55,339 INFO L225 Difference]: With dead ends: 35 [2022-02-15 01:36:55,339 INFO L226 Difference]: Without dead ends: 17 [2022-02-15 01:36:55,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:36:55,347 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:55,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:36:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-15 01:36:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-15 01:36:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:36:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-15 01:36:55,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-02-15 01:36:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:55,379 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-15 01:36:55,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-15 01:36:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 01:36:55,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:55,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:55,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:36:55,381 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:55,382 INFO L85 PathProgramCache]: Analyzing trace with hash -925667238, now seen corresponding path program 1 times [2022-02-15 01:36:55,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:55,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598492152] [2022-02-15 01:36:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:55,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:55,389 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:36:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:55,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:55,495 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:55,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598492152] [2022-02-15 01:36:55,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [598492152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:55,496 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:55,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:36:55,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874885958] [2022-02-15 01:36:55,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:55,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:36:55,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:36:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:36:55,499 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:55,603 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-02-15 01:36:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:36:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-15 01:36:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:55,605 INFO L225 Difference]: With dead ends: 28 [2022-02-15 01:36:55,605 INFO L226 Difference]: Without dead ends: 26 [2022-02-15 01:36:55,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:36:55,610 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:55,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:36:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-15 01:36:55,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-02-15 01:36:55,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:36:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-02-15 01:36:55,623 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-02-15 01:36:55,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:55,624 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-02-15 01:36:55,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-02-15 01:36:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:36:55,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:55,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:55,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:36:55,628 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:55,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1147629988, now seen corresponding path program 1 times [2022-02-15 01:36:55,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:55,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605699374] [2022-02-15 01:36:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:55,834 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:55,835 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:36:55,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:55,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:56,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:56,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605699374] [2022-02-15 01:36:56,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [605699374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:56,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:56,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:36:56,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227925061] [2022-02-15 01:36:56,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:56,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:36:56,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:56,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:36:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:36:56,004 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:56,303 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-02-15 01:36:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:36:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-15 01:36:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:56,304 INFO L225 Difference]: With dead ends: 43 [2022-02-15 01:36:56,304 INFO L226 Difference]: Without dead ends: 33 [2022-02-15 01:36:56,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:36:56,306 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:56,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 40 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:36:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-15 01:36:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-02-15 01:36:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:36:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-02-15 01:36:56,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2022-02-15 01:36:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:56,314 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-02-15 01:36:56,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-02-15 01:36:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:36:56,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:56,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:56,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:36:56,315 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1699353956, now seen corresponding path program 1 times [2022-02-15 01:36:56,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:56,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338129447] [2022-02-15 01:36:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:56,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:56,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:56,499 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:56,499 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:56,499 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:56,500 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:56,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:56,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:56,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:56,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338129447] [2022-02-15 01:36:56,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [338129447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:56,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:56,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:36:56,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228784613] [2022-02-15 01:36:56,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:56,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:36:56,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:36:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:36:56,696 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:57,021 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-02-15 01:36:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:36:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-15 01:36:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:57,023 INFO L225 Difference]: With dead ends: 48 [2022-02-15 01:36:57,023 INFO L226 Difference]: Without dead ends: 32 [2022-02-15 01:36:57,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:36:57,031 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:57,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 61 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:36:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-15 01:36:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-02-15 01:36:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:36:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-02-15 01:36:57,036 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2022-02-15 01:36:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:57,037 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-02-15 01:36:57,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-02-15 01:36:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:36:57,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:57,037 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:57,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:36:57,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -958875614, now seen corresponding path program 2 times [2022-02-15 01:36:57,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:57,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68701337] [2022-02-15 01:36:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:57,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:57,176 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:57,176 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:57,176 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:57,176 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:57,177 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:57,177 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:57,177 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:57,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:57,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:57,398 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:57,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68701337] [2022-02-15 01:36:57,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [68701337] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:57,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:57,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:36:57,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963977794] [2022-02-15 01:36:57,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:57,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:36:57,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:57,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:36:57,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:36:57,400 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:57,648 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-02-15 01:36:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:36:57,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-15 01:36:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:57,650 INFO L225 Difference]: With dead ends: 42 [2022-02-15 01:36:57,650 INFO L226 Difference]: Without dead ends: 33 [2022-02-15 01:36:57,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:36:57,651 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:57,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 57 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:36:57,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-15 01:36:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-02-15 01:36:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:36:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-02-15 01:36:57,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2022-02-15 01:36:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:57,675 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-02-15 01:36:57,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-02-15 01:36:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:36:57,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:57,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:57,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:36:57,676 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash 816131748, now seen corresponding path program 3 times [2022-02-15 01:36:57,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:57,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026352040] [2022-02-15 01:36:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:57,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:57,824 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:57,824 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:57,824 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:57,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:57,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:57,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:57,825 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:57,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:57,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:58,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:58,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026352040] [2022-02-15 01:36:58,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1026352040] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:58,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:58,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:36:58,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552310552] [2022-02-15 01:36:58,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:58,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:36:58,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:36:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:36:58,071 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:58,362 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-02-15 01:36:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:36:58,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-15 01:36:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:58,363 INFO L225 Difference]: With dead ends: 44 [2022-02-15 01:36:58,363 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 01:36:58,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:36:58,364 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:58,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 62 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:36:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 01:36:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-02-15 01:36:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:36:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-02-15 01:36:58,372 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2022-02-15 01:36:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:58,372 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-02-15 01:36:58,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-02-15 01:36:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 01:36:58,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:58,373 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:58,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:36:58,373 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:58,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1454386014, now seen corresponding path program 4 times [2022-02-15 01:36:58,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:58,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369870856] [2022-02-15 01:36:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:58,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:58,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:58,492 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:58,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:58,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:58,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:58,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:58,493 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:58,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:58,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:58,707 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:58,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369870856] [2022-02-15 01:36:58,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369870856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:58,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:58,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:36:58,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416222072] [2022-02-15 01:36:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:58,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:36:58,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:36:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:36:58,710 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:58,920 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-02-15 01:36:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:36:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 01:36:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:58,921 INFO L225 Difference]: With dead ends: 40 [2022-02-15 01:36:58,921 INFO L226 Difference]: Without dead ends: 33 [2022-02-15 01:36:58,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:36:58,922 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:58,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:36:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-15 01:36:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-02-15 01:36:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:36:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-02-15 01:36:58,927 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 23 [2022-02-15 01:36:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:58,927 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-02-15 01:36:58,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-02-15 01:36:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 01:36:58,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:58,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:58,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:36:58,928 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:58,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:58,928 INFO L85 PathProgramCache]: Analyzing trace with hash -713648358, now seen corresponding path program 5 times [2022-02-15 01:36:58,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:58,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708040074] [2022-02-15 01:36:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:58,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:59,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:59,052 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:59,053 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:59,053 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:59,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:59,054 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:59,054 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:59,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:59,257 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:59,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708040074] [2022-02-15 01:36:59,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [708040074] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:59,258 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:59,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:36:59,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666517343] [2022-02-15 01:36:59,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:59,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:36:59,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:36:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:36:59,259 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:59,549 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-02-15 01:36:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:36:59,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 01:36:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:59,551 INFO L225 Difference]: With dead ends: 50 [2022-02-15 01:36:59,551 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 01:36:59,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:36:59,552 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:59,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 69 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:36:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 01:36:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-02-15 01:36:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 32 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:36:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-02-15 01:36:59,560 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 23 [2022-02-15 01:36:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:59,560 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-02-15 01:36:59,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-02-15 01:36:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 01:36:59,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:59,561 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:59,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:36:59,561 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1061359004, now seen corresponding path program 6 times [2022-02-15 01:36:59,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:59,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310970780] [2022-02-15 01:36:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:59,605 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:59,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:36:59,663 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:59,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:59,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:59,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:59,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:36:59,664 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:36:59,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:59,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:59,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:59,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310970780] [2022-02-15 01:36:59,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310970780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:59,926 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:59,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:36:59,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738611668] [2022-02-15 01:36:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:59,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:36:59,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:59,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:36:59,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:36:59,927 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:00,286 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-02-15 01:37:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:37:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 01:37:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:00,287 INFO L225 Difference]: With dead ends: 51 [2022-02-15 01:37:00,287 INFO L226 Difference]: Without dead ends: 43 [2022-02-15 01:37:00,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:37:00,295 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:00,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-15 01:37:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-02-15 01:37:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.34375) internal successors, (43), 34 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-02-15 01:37:00,303 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 23 [2022-02-15 01:37:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:00,304 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-02-15 01:37:00,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-02-15 01:37:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:37:00,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:00,305 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:00,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:37:00,305 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1280199014, now seen corresponding path program 7 times [2022-02-15 01:37:00,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:00,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114223638] [2022-02-15 01:37:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:00,350 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:00,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:00,411 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:00,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:00,411 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:00,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:00,412 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:00,413 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:00,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:00,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:00,643 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:00,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114223638] [2022-02-15 01:37:00,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114223638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:00,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:00,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:37:00,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828906138] [2022-02-15 01:37:00,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:00,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:37:00,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:00,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:37:00,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:37:00,645 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:00,917 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-02-15 01:37:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:37:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:37:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:00,918 INFO L225 Difference]: With dead ends: 47 [2022-02-15 01:37:00,918 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 01:37:00,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:37:00,920 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:00,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 61 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:37:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 01:37:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-15 01:37:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.3125) internal successors, (42), 34 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-02-15 01:37:00,926 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 26 [2022-02-15 01:37:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:00,926 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-02-15 01:37:00,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-02-15 01:37:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:37:00,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:00,927 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:00,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:37:00,927 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash -887835358, now seen corresponding path program 8 times [2022-02-15 01:37:00,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:00,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189594196] [2022-02-15 01:37:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:00,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:01,044 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:01,044 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:01,044 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:01,044 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:01,045 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:01,045 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:01,045 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:01,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:01,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:01,310 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:01,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189594196] [2022-02-15 01:37:01,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189594196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:01,310 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:01,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:37:01,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272955111] [2022-02-15 01:37:01,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:01,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:37:01,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:37:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:37:01,312 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:01,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:01,792 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-02-15 01:37:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:37:01,792 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:37:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:01,793 INFO L225 Difference]: With dead ends: 67 [2022-02-15 01:37:01,793 INFO L226 Difference]: Without dead ends: 56 [2022-02-15 01:37:01,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:37:01,795 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:01,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 86 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:01,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-15 01:37:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-02-15 01:37:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 46 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2022-02-15 01:37:01,817 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 26 [2022-02-15 01:37:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:01,817 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2022-02-15 01:37:01,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2022-02-15 01:37:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:37:01,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:01,818 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:01,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:37:01,818 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash 887172004, now seen corresponding path program 9 times [2022-02-15 01:37:01,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:01,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296452901] [2022-02-15 01:37:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:01,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:01,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:01,915 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:01,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:01,915 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:01,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:01,916 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:01,916 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:01,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:02,193 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:02,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296452901] [2022-02-15 01:37:02,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296452901] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:02,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:02,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:37:02,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586330851] [2022-02-15 01:37:02,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:02,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:37:02,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:37:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:37:02,195 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:02,746 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-02-15 01:37:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:37:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:37:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:02,747 INFO L225 Difference]: With dead ends: 66 [2022-02-15 01:37:02,747 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 01:37:02,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:37:02,749 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:02,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 99 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 01:37:02,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-02-15 01:37:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 48 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-02-15 01:37:02,758 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 26 [2022-02-15 01:37:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:02,759 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-02-15 01:37:02,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-02-15 01:37:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:37:02,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:02,760 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:02,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:37:02,760 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:02,760 INFO L85 PathProgramCache]: Analyzing trace with hash 589554586, now seen corresponding path program 10 times [2022-02-15 01:37:02,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:02,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781197977] [2022-02-15 01:37:02,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:02,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:02,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:02,903 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:02,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:02,904 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:02,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:02,904 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:02,904 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:02,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:02,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:03,117 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:03,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781197977] [2022-02-15 01:37:03,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [781197977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:03,118 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:03,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:37:03,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803104752] [2022-02-15 01:37:03,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:03,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:37:03,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:37:03,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:37:03,119 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:03,409 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-02-15 01:37:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:37:03,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 01:37:03,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:03,410 INFO L225 Difference]: With dead ends: 61 [2022-02-15 01:37:03,410 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 01:37:03,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:37:03,411 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:03,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 70 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:37:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 01:37:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2022-02-15 01:37:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.368421052631579) internal successors, (52), 40 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-02-15 01:37:03,417 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 29 [2022-02-15 01:37:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:03,417 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-02-15 01:37:03,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-02-15 01:37:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:37:03,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:03,418 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:03,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:37:03,418 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:03,418 INFO L85 PathProgramCache]: Analyzing trace with hash 395775582, now seen corresponding path program 11 times [2022-02-15 01:37:03,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:03,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121310348] [2022-02-15 01:37:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:03,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:03,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:03,538 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:03,538 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:03,538 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:03,538 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:03,538 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:03,538 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:03,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:03,778 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:03,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121310348] [2022-02-15 01:37:03,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [121310348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:03,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:03,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:37:03,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473883475] [2022-02-15 01:37:03,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:03,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:37:03,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:03,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:37:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:37:03,779 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:04,142 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-02-15 01:37:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:37:04,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 01:37:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:04,143 INFO L225 Difference]: With dead ends: 54 [2022-02-15 01:37:04,143 INFO L226 Difference]: Without dead ends: 47 [2022-02-15 01:37:04,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:37:04,144 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:04,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 82 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-15 01:37:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-02-15 01:37:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 40 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-02-15 01:37:04,152 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2022-02-15 01:37:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:04,153 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-02-15 01:37:04,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-02-15 01:37:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:37:04,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:04,153 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:04,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:37:04,154 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1772258790, now seen corresponding path program 12 times [2022-02-15 01:37:04,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:04,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78854668] [2022-02-15 01:37:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:04,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:04,255 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:04,255 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:04,256 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:04,256 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:04,256 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:04,256 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:04,256 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:04,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:04,562 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:04,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78854668] [2022-02-15 01:37:04,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [78854668] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:04,562 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:04,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:37:04,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401046383] [2022-02-15 01:37:04,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:04,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:37:04,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:04,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:37:04,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:37:04,563 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:05,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:05,115 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-02-15 01:37:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:37:05,115 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 01:37:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:05,116 INFO L225 Difference]: With dead ends: 79 [2022-02-15 01:37:05,116 INFO L226 Difference]: Without dead ends: 67 [2022-02-15 01:37:05,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:37:05,117 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:05,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 83 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-15 01:37:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2022-02-15 01:37:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 55 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 82 transitions. [2022-02-15 01:37:05,126 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 82 transitions. Word has length 29 [2022-02-15 01:37:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:05,126 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 82 transitions. [2022-02-15 01:37:05,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 82 transitions. [2022-02-15 01:37:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:37:05,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:05,129 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:05,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:37:05,129 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:05,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:05,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2748572, now seen corresponding path program 13 times [2022-02-15 01:37:05,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:05,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724067196] [2022-02-15 01:37:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:05,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:05,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:05,228 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:05,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:05,230 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:05,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:05,230 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:05,230 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:05,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:05,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:05,531 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:05,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724067196] [2022-02-15 01:37:05,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1724067196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:05,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:05,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:37:05,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512634346] [2022-02-15 01:37:05,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:05,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:37:05,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:37:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:37:05,533 INFO L87 Difference]: Start difference. First operand 61 states and 82 transitions. Second operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:06,158 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2022-02-15 01:37:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:37:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 01:37:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:06,159 INFO L225 Difference]: With dead ends: 76 [2022-02-15 01:37:06,159 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 01:37:06,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=2139, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:37:06,160 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:06,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 105 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 01:37:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-02-15 01:37:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.4) internal successors, (77), 57 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2022-02-15 01:37:06,169 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 29 [2022-02-15 01:37:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:06,170 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2022-02-15 01:37:06,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:06,170 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2022-02-15 01:37:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:37:06,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:06,171 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:06,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:37:06,171 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:06,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1939514462, now seen corresponding path program 14 times [2022-02-15 01:37:06,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:06,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194839622] [2022-02-15 01:37:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:06,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:06,256 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:06,257 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:06,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:06,257 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:06,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:06,257 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:06,257 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:06,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:06,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:06,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:06,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194839622] [2022-02-15 01:37:06,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194839622] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:06,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:06,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:37:06,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326038624] [2022-02-15 01:37:06,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:06,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:37:06,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:06,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:37:06,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:37:06,515 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:06,904 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2022-02-15 01:37:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:37:06,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:37:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:06,905 INFO L225 Difference]: With dead ends: 71 [2022-02-15 01:37:06,905 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 01:37:06,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:37:06,906 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:06,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 81 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 01:37:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-02-15 01:37:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 57 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-02-15 01:37:06,914 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 32 [2022-02-15 01:37:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:06,914 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-02-15 01:37:06,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-02-15 01:37:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:37:06,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:06,915 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:06,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:37:06,915 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:06,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2133293466, now seen corresponding path program 15 times [2022-02-15 01:37:06,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:06,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662583592] [2022-02-15 01:37:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:06,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:07,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:07,025 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:07,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:07,026 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:07,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:07,026 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:07,026 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:07,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:07,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:07,358 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:07,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662583592] [2022-02-15 01:37:07,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [662583592] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:07,359 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:07,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:37:07,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973649249] [2022-02-15 01:37:07,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:07,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:37:07,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:07,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:37:07,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:37:07,360 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:07,819 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2022-02-15 01:37:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:37:07,820 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:37:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:07,820 INFO L225 Difference]: With dead ends: 72 [2022-02-15 01:37:07,820 INFO L226 Difference]: Without dead ends: 65 [2022-02-15 01:37:07,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:37:07,822 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:07,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 83 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-15 01:37:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-02-15 01:37:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 57 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-02-15 01:37:07,846 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2022-02-15 01:37:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:07,846 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-02-15 01:37:07,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-02-15 01:37:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:37:07,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:07,846 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:07,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:37:07,847 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:07,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:07,847 INFO L85 PathProgramCache]: Analyzing trace with hash -6360542, now seen corresponding path program 16 times [2022-02-15 01:37:07,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:07,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776934316] [2022-02-15 01:37:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:07,876 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:07,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:07,959 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:07,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:07,959 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:07,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:07,959 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:07,959 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:07,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:08,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:08,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:08,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776934316] [2022-02-15 01:37:08,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [776934316] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:08,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:08,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:37:08,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124136844] [2022-02-15 01:37:08,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:08,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:37:08,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:37:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:37:08,309 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:08,944 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2022-02-15 01:37:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:37:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:37:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:08,945 INFO L225 Difference]: With dead ends: 102 [2022-02-15 01:37:08,945 INFO L226 Difference]: Without dead ends: 89 [2022-02-15 01:37:08,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:37:08,946 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:08,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 95 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-15 01:37:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2022-02-15 01:37:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.4246575342465753) internal successors, (104), 75 states have internal predecessors, (104), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 111 transitions. [2022-02-15 01:37:08,957 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 111 transitions. Word has length 32 [2022-02-15 01:37:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:08,958 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 111 transitions. [2022-02-15 01:37:08,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 111 transitions. [2022-02-15 01:37:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:37:08,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:08,958 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:08,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:37:08,958 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:08,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1768646820, now seen corresponding path program 17 times [2022-02-15 01:37:08,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:08,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158828524] [2022-02-15 01:37:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:08,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:09,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:09,058 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:09,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:09,058 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:09,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:09,058 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:09,058 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:09,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:09,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:09,455 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:09,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158828524] [2022-02-15 01:37:09,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1158828524] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:09,455 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:09,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:37:09,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679841848] [2022-02-15 01:37:09,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:09,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:37:09,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:09,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:37:09,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:37:09,456 INFO L87 Difference]: Start difference. First operand 81 states and 111 transitions. Second operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:10,086 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-02-15 01:37:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:37:10,087 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:37:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:10,087 INFO L225 Difference]: With dead ends: 97 [2022-02-15 01:37:10,087 INFO L226 Difference]: Without dead ends: 89 [2022-02-15 01:37:10,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=2730, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:37:10,089 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:10,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 101 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-15 01:37:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2022-02-15 01:37:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 77 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2022-02-15 01:37:10,100 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 32 [2022-02-15 01:37:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:10,100 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2022-02-15 01:37:10,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2022-02-15 01:37:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:37:10,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:10,101 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:10,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:37:10,101 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1610012638, now seen corresponding path program 18 times [2022-02-15 01:37:10,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:10,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043489928] [2022-02-15 01:37:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:10,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:10,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:10,198 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:10,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:10,198 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:10,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:10,198 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:10,198 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:10,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:10,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:10,442 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:10,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043489928] [2022-02-15 01:37:10,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043489928] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:10,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:10,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:37:10,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909414484] [2022-02-15 01:37:10,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:10,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:37:10,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:10,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:37:10,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:37:10,443 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:10,805 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2022-02-15 01:37:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:37:10,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:37:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:10,806 INFO L225 Difference]: With dead ends: 90 [2022-02-15 01:37:10,806 INFO L226 Difference]: Without dead ends: 83 [2022-02-15 01:37:10,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:37:10,806 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:10,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-15 01:37:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-02-15 01:37:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.421875) internal successors, (91), 66 states have internal predecessors, (91), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2022-02-15 01:37:10,815 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 35 [2022-02-15 01:37:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:10,815 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2022-02-15 01:37:10,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2022-02-15 01:37:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:37:10,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:10,816 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:10,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:37:10,816 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1175750298, now seen corresponding path program 19 times [2022-02-15 01:37:10,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:10,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43494458] [2022-02-15 01:37:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:10,842 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:10,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:10,918 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:10,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:10,918 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:10,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:10,918 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:10,919 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:10,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:10,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:11,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:11,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43494458] [2022-02-15 01:37:11,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [43494458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:11,252 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:11,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:37:11,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029696572] [2022-02-15 01:37:11,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:11,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:37:11,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:37:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:37:11,264 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:11,719 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2022-02-15 01:37:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:37:11,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:37:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:11,722 INFO L225 Difference]: With dead ends: 81 [2022-02-15 01:37:11,722 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 01:37:11,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:37:11,723 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:11,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 87 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 01:37:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-02-15 01:37:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.40625) internal successors, (90), 66 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2022-02-15 01:37:11,732 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 35 [2022-02-15 01:37:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:11,732 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2022-02-15 01:37:11,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2022-02-15 01:37:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:37:11,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:11,732 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:11,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:37:11,733 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash 981971294, now seen corresponding path program 20 times [2022-02-15 01:37:11,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:11,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446816570] [2022-02-15 01:37:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:11,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:11,837 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:11,837 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:11,838 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:11,838 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:11,838 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:11,838 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:11,838 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:11,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:11,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:12,234 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:12,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446816570] [2022-02-15 01:37:12,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1446816570] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:12,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:12,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:37:12,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180743221] [2022-02-15 01:37:12,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:12,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:37:12,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:37:12,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:37:12,235 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:12,745 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2022-02-15 01:37:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:37:12,745 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:37:12,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:12,748 INFO L225 Difference]: With dead ends: 82 [2022-02-15 01:37:12,748 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 01:37:12,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:37:12,751 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:12,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 99 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 01:37:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-02-15 01:37:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.390625) internal successors, (89), 66 states have internal predecessors, (89), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2022-02-15 01:37:12,762 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 35 [2022-02-15 01:37:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:12,762 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2022-02-15 01:37:12,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2022-02-15 01:37:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:37:12,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:12,763 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:12,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:37:12,763 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1186063078, now seen corresponding path program 21 times [2022-02-15 01:37:12,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:12,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660782251] [2022-02-15 01:37:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:12,792 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:12,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:12,847 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:12,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:12,847 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:12,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:12,848 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:12,848 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:12,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:12,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:13,241 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:13,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660782251] [2022-02-15 01:37:13,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [660782251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:13,241 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:13,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:37:13,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000612032] [2022-02-15 01:37:13,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:13,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:37:13,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:37:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:37:13,243 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:14,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:14,052 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2022-02-15 01:37:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:37:14,052 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:37:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:14,053 INFO L225 Difference]: With dead ends: 117 [2022-02-15 01:37:14,053 INFO L226 Difference]: Without dead ends: 103 [2022-02-15 01:37:14,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=2947, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:37:14,055 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:14,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 107 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:37:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-15 01:37:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2022-02-15 01:37:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.4470588235294117) internal successors, (123), 87 states have internal predecessors, (123), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 130 transitions. [2022-02-15 01:37:14,074 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 130 transitions. Word has length 35 [2022-02-15 01:37:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:14,074 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 130 transitions. [2022-02-15 01:37:14,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 130 transitions. [2022-02-15 01:37:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:37:14,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:14,075 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:14,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:37:14,075 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:14,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash 588944284, now seen corresponding path program 22 times [2022-02-15 01:37:14,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:14,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27100865] [2022-02-15 01:37:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:14,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:14,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:14,193 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:14,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:14,193 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:14,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:14,194 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:14,194 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:14,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:14,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:14,642 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:14,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27100865] [2022-02-15 01:37:14,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [27100865] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:14,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:14,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:37:14,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349847911] [2022-02-15 01:37:14,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:14,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:37:14,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:37:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:37:14,643 INFO L87 Difference]: Start difference. First operand 93 states and 130 transitions. Second operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:15,417 INFO L93 Difference]: Finished difference Result 110 states and 149 transitions. [2022-02-15 01:37:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:37:15,417 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:37:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:15,418 INFO L225 Difference]: With dead ends: 110 [2022-02-15 01:37:15,418 INFO L226 Difference]: Without dead ends: 102 [2022-02-15 01:37:15,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=3395, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:37:15,419 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:15,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 117 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:37:15,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-15 01:37:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2022-02-15 01:37:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.4367816091954022) internal successors, (125), 89 states have internal predecessors, (125), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 132 transitions. [2022-02-15 01:37:15,433 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 132 transitions. Word has length 35 [2022-02-15 01:37:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:15,434 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 132 transitions. [2022-02-15 01:37:15,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 132 transitions. [2022-02-15 01:37:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:37:15,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:15,434 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:15,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:37:15,434 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1485821466, now seen corresponding path program 23 times [2022-02-15 01:37:15,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:15,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970080891] [2022-02-15 01:37:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:15,473 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:15,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:15,527 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:15,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:15,527 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:15,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:15,527 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:15,528 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:15,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:15,789 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:15,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970080891] [2022-02-15 01:37:15,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [970080891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:15,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:15,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:37:15,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092945148] [2022-02-15 01:37:15,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:15,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:37:15,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:37:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:37:15,790 INFO L87 Difference]: Start difference. First operand 95 states and 132 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:16,222 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-02-15 01:37:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:37:16,223 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:37:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:16,224 INFO L225 Difference]: With dead ends: 103 [2022-02-15 01:37:16,224 INFO L226 Difference]: Without dead ends: 96 [2022-02-15 01:37:16,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:37:16,225 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:16,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 91 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-15 01:37:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-02-15 01:37:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 89 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 131 transitions. [2022-02-15 01:37:16,249 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 131 transitions. Word has length 38 [2022-02-15 01:37:16,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:16,249 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 131 transitions. [2022-02-15 01:37:16,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 131 transitions. [2022-02-15 01:37:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:37:16,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:16,249 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:16,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:37:16,250 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:16,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:16,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1920083806, now seen corresponding path program 24 times [2022-02-15 01:37:16,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:16,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793821734] [2022-02-15 01:37:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:16,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:16,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:16,366 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:16,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:16,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:16,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:16,367 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:16,367 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:16,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:16,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:16,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:16,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793821734] [2022-02-15 01:37:16,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793821734] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:16,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:16,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:37:16,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886606341] [2022-02-15 01:37:16,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:16,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:37:16,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:16,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:37:16,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:37:16,725 INFO L87 Difference]: Start difference. First operand 95 states and 131 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:17,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:17,263 INFO L93 Difference]: Finished difference Result 105 states and 140 transitions. [2022-02-15 01:37:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:37:17,263 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:37:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:17,264 INFO L225 Difference]: With dead ends: 105 [2022-02-15 01:37:17,264 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:37:17,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:37:17,265 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:17,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 93 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:37:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2022-02-15 01:37:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 89 states have internal predecessors, (123), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 130 transitions. [2022-02-15 01:37:17,278 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 130 transitions. Word has length 38 [2022-02-15 01:37:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:17,278 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 130 transitions. [2022-02-15 01:37:17,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 130 transitions. [2022-02-15 01:37:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:37:17,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:17,278 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:17,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:37:17,279 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2113862810, now seen corresponding path program 25 times [2022-02-15 01:37:17,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:17,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063139849] [2022-02-15 01:37:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:17,332 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:17,398 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:17,399 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:17,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:17,399 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:17,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:17,399 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:17,400 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:17,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:17,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:17,783 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:17,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063139849] [2022-02-15 01:37:17,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2063139849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:17,783 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:17,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:37:17,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961690586] [2022-02-15 01:37:17,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:17,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:37:17,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:37:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:37:17,785 INFO L87 Difference]: Start difference. First operand 95 states and 130 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:18,401 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2022-02-15 01:37:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:37:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:37:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:18,403 INFO L225 Difference]: With dead ends: 106 [2022-02-15 01:37:18,413 INFO L226 Difference]: Without dead ends: 99 [2022-02-15 01:37:18,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:37:18,414 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:18,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 100 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-15 01:37:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-02-15 01:37:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.4022988505747127) internal successors, (122), 89 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 129 transitions. [2022-02-15 01:37:18,426 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 129 transitions. Word has length 38 [2022-02-15 01:37:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:18,426 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 129 transitions. [2022-02-15 01:37:18,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 129 transitions. [2022-02-15 01:37:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:37:18,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:18,427 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:18,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:37:18,427 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash 13070114, now seen corresponding path program 26 times [2022-02-15 01:37:18,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:18,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952343265] [2022-02-15 01:37:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:18,467 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:18,551 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:18,551 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:18,552 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:18,552 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:18,552 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:18,552 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:18,552 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:18,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:18,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:19,024 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:19,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952343265] [2022-02-15 01:37:19,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952343265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:19,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:19,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:37:19,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345158608] [2022-02-15 01:37:19,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:19,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:37:19,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:37:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:37:19,025 INFO L87 Difference]: Start difference. First operand 95 states and 129 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:19,984 INFO L93 Difference]: Finished difference Result 146 states and 203 transitions. [2022-02-15 01:37:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:37:19,984 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:37:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:19,985 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:37:19,986 INFO L226 Difference]: Without dead ends: 131 [2022-02-15 01:37:19,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=3634, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:37:19,987 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:19,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 129 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:37:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-15 01:37:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2022-02-15 01:37:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 111 states have (on average 1.4504504504504505) internal successors, (161), 113 states have internal predecessors, (161), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2022-02-15 01:37:20,010 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 38 [2022-02-15 01:37:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:20,011 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2022-02-15 01:37:20,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2022-02-15 01:37:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:37:20,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:20,011 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:20,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:37:20,011 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:20,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1788077476, now seen corresponding path program 27 times [2022-02-15 01:37:20,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:20,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109444978] [2022-02-15 01:37:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:20,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:20,132 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:20,132 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:20,132 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:20,132 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:20,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:20,133 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:20,133 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:20,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:20,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:20,606 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:20,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109444978] [2022-02-15 01:37:20,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [109444978] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:20,606 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:20,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:37:20,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145315125] [2022-02-15 01:37:20,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:20,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:37:20,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:20,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:37:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:37:20,607 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:21,399 INFO L93 Difference]: Finished difference Result 137 states and 188 transitions. [2022-02-15 01:37:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:37:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:37:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:21,400 INFO L225 Difference]: With dead ends: 137 [2022-02-15 01:37:21,400 INFO L226 Difference]: Without dead ends: 129 [2022-02-15 01:37:21,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=4128, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:37:21,402 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:21,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 118 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:37:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-15 01:37:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2022-02-15 01:37:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 113 states have (on average 1.4424778761061947) internal successors, (163), 115 states have internal predecessors, (163), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 170 transitions. [2022-02-15 01:37:21,420 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 170 transitions. Word has length 38 [2022-02-15 01:37:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:21,420 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 170 transitions. [2022-02-15 01:37:21,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:21,420 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 170 transitions. [2022-02-15 01:37:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:37:21,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:21,420 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:21,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:37:21,421 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1315975962, now seen corresponding path program 28 times [2022-02-15 01:37:21,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:21,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26888442] [2022-02-15 01:37:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:21,448 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:21,522 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:21,522 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:21,522 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:21,522 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:21,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:21,523 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:21,523 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:21,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:21,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:21,866 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:21,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26888442] [2022-02-15 01:37:21,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [26888442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:21,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:21,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:37:21,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667814799] [2022-02-15 01:37:21,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:21,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:37:21,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:21,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:37:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:37:21,868 INFO L87 Difference]: Start difference. First operand 121 states and 170 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:22,339 INFO L93 Difference]: Finished difference Result 128 states and 176 transitions. [2022-02-15 01:37:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:37:22,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:37:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:22,342 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:37:22,342 INFO L226 Difference]: Without dead ends: 121 [2022-02-15 01:37:22,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:37:22,343 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:22,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-15 01:37:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 107. [2022-02-15 01:37:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.4545454545454546) internal successors, (144), 101 states have internal predecessors, (144), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2022-02-15 01:37:22,362 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 41 [2022-02-15 01:37:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:22,363 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2022-02-15 01:37:22,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2022-02-15 01:37:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:37:22,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:22,363 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:22,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:37:22,364 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:22,364 INFO L85 PathProgramCache]: Analyzing trace with hash 648100574, now seen corresponding path program 29 times [2022-02-15 01:37:22,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:22,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241618348] [2022-02-15 01:37:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:22,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:22,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:22,445 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:22,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:22,445 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:22,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:22,446 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:22,446 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:22,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:22,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:22,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:22,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241618348] [2022-02-15 01:37:22,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241618348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:22,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:22,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:37:22,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895678575] [2022-02-15 01:37:22,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:22,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:37:22,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:22,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:37:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:37:22,784 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:23,298 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2022-02-15 01:37:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:37:23,298 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:37:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:23,299 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:37:23,299 INFO L226 Difference]: Without dead ends: 109 [2022-02-15 01:37:23,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:37:23,300 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:23,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 87 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-15 01:37:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-02-15 01:37:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.4444444444444444) internal successors, (143), 101 states have internal predecessors, (143), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 150 transitions. [2022-02-15 01:37:23,314 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 150 transitions. Word has length 41 [2022-02-15 01:37:23,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:23,314 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 150 transitions. [2022-02-15 01:37:23,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 150 transitions. [2022-02-15 01:37:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:37:23,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:23,315 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:23,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:37:23,315 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:23,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:23,315 INFO L85 PathProgramCache]: Analyzing trace with hash 213838234, now seen corresponding path program 30 times [2022-02-15 01:37:23,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:23,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902595911] [2022-02-15 01:37:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:23,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:23,441 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:23,441 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:23,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:23,442 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:23,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:23,442 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:23,442 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:23,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:23,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:23,827 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:23,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902595911] [2022-02-15 01:37:23,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [902595911] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:23,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:23,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:37:23,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659624904] [2022-02-15 01:37:23,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:23,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:37:23,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:23,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:37:23,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:37:23,829 INFO L87 Difference]: Start difference. First operand 107 states and 150 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:24,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:24,429 INFO L93 Difference]: Finished difference Result 118 states and 160 transitions. [2022-02-15 01:37:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:37:24,429 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:37:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:24,430 INFO L225 Difference]: With dead ends: 118 [2022-02-15 01:37:24,430 INFO L226 Difference]: Without dead ends: 111 [2022-02-15 01:37:24,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=2945, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:37:24,431 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:24,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 89 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-15 01:37:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2022-02-15 01:37:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.4343434343434343) internal successors, (142), 101 states have internal predecessors, (142), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 149 transitions. [2022-02-15 01:37:24,446 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 149 transitions. Word has length 41 [2022-02-15 01:37:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:24,446 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 149 transitions. [2022-02-15 01:37:24,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 149 transitions. [2022-02-15 01:37:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:37:24,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:24,446 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:24,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:37:24,447 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash 20059230, now seen corresponding path program 31 times [2022-02-15 01:37:24,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:24,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499747491] [2022-02-15 01:37:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:24,473 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:24,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:24,544 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:24,545 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:24,545 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:24,545 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:24,545 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:24,545 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:24,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:24,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:24,976 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:24,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499747491] [2022-02-15 01:37:24,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499747491] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:24,976 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:24,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:37:24,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863599507] [2022-02-15 01:37:24,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:24,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:37:24,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:24,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:37:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:37:24,978 INFO L87 Difference]: Start difference. First operand 107 states and 149 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:25,796 INFO L93 Difference]: Finished difference Result 119 states and 160 transitions. [2022-02-15 01:37:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:37:25,796 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:37:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:25,797 INFO L225 Difference]: With dead ends: 119 [2022-02-15 01:37:25,797 INFO L226 Difference]: Without dead ends: 112 [2022-02-15 01:37:25,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=3630, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:37:25,798 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:25,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 121 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:37:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-15 01:37:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-02-15 01:37:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.4242424242424243) internal successors, (141), 101 states have internal predecessors, (141), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 148 transitions. [2022-02-15 01:37:25,813 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 148 transitions. Word has length 41 [2022-02-15 01:37:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:25,813 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 148 transitions. [2022-02-15 01:37:25,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 148 transitions. [2022-02-15 01:37:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:37:25,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:25,814 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:25,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:37:25,814 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2146992154, now seen corresponding path program 32 times [2022-02-15 01:37:25,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:25,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403310338] [2022-02-15 01:37:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:25,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:25,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:25,923 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:25,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:25,923 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:25,924 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:25,924 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:25,924 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:25,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:25,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:26,411 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:26,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403310338] [2022-02-15 01:37:26,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [403310338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:26,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:26,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:37:26,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746444357] [2022-02-15 01:37:26,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:26,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:37:26,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:26,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:37:26,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:37:26,412 INFO L87 Difference]: Start difference. First operand 107 states and 148 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:27,409 INFO L93 Difference]: Finished difference Result 164 states and 231 transitions. [2022-02-15 01:37:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:37:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:37:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:27,410 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:37:27,410 INFO L226 Difference]: Without dead ends: 148 [2022-02-15 01:37:27,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=4391, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:37:27,411 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:27,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 126 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:37:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-15 01:37:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 134. [2022-02-15 01:37:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.4682539682539681) internal successors, (185), 128 states have internal predecessors, (185), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 192 transitions. [2022-02-15 01:37:27,431 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 192 transitions. Word has length 41 [2022-02-15 01:37:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:27,431 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 192 transitions. [2022-02-15 01:37:27,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 192 transitions. [2022-02-15 01:37:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:37:27,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:27,431 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:27,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:37:27,431 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash -372967780, now seen corresponding path program 33 times [2022-02-15 01:37:27,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:27,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813895234] [2022-02-15 01:37:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:27,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:27,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:27,524 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:27,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:27,525 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:27,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:27,525 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:27,525 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:27,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:27,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:28,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:28,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813895234] [2022-02-15 01:37:28,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1813895234] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:28,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:28,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:37:28,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476333080] [2022-02-15 01:37:28,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:28,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:37:28,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:28,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:37:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:37:28,009 INFO L87 Difference]: Start difference. First operand 134 states and 192 transitions. Second operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:29,010 INFO L93 Difference]: Finished difference Result 153 states and 213 transitions. [2022-02-15 01:37:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:37:29,011 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:37:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:29,011 INFO L225 Difference]: With dead ends: 153 [2022-02-15 01:37:29,012 INFO L226 Difference]: Without dead ends: 145 [2022-02-15 01:37:29,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=319, Invalid=4937, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:37:29,013 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:29,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 124 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:37:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-15 01:37:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2022-02-15 01:37:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.4609375) internal successors, (187), 130 states have internal predecessors, (187), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2022-02-15 01:37:29,033 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 41 [2022-02-15 01:37:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:29,033 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2022-02-15 01:37:29,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2022-02-15 01:37:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:37:29,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:29,034 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:29,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:37:29,034 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1118445790, now seen corresponding path program 34 times [2022-02-15 01:37:29,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:29,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703235728] [2022-02-15 01:37:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:29,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:29,136 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:29,136 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:29,136 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:29,137 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:29,137 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:29,137 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:29,137 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:29,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:29,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:29,502 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:29,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703235728] [2022-02-15 01:37:29,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703235728] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:29,502 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:29,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:37:29,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979449290] [2022-02-15 01:37:29,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:29,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:37:29,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:37:29,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:37:29,503 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:30,014 INFO L93 Difference]: Finished difference Result 144 states and 201 transitions. [2022-02-15 01:37:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:37:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:37:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:30,015 INFO L225 Difference]: With dead ends: 144 [2022-02-15 01:37:30,015 INFO L226 Difference]: Without dead ends: 137 [2022-02-15 01:37:30,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:37:30,016 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:30,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 91 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-15 01:37:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-02-15 01:37:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.453125) internal successors, (186), 130 states have internal predecessors, (186), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 193 transitions. [2022-02-15 01:37:30,038 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 193 transitions. Word has length 44 [2022-02-15 01:37:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:30,038 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 193 transitions. [2022-02-15 01:37:30,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 193 transitions. [2022-02-15 01:37:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:37:30,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:30,039 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:30,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:37:30,039 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:30,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1786321178, now seen corresponding path program 35 times [2022-02-15 01:37:30,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:30,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331909555] [2022-02-15 01:37:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:30,079 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:30,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:30,126 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:30,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:30,126 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:30,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:30,126 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:30,126 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:30,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:30,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:30,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:30,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331909555] [2022-02-15 01:37:30,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [331909555] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:30,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:30,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:37:30,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673388602] [2022-02-15 01:37:30,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:30,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:37:30,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:30,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:37:30,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:37:30,516 INFO L87 Difference]: Start difference. First operand 136 states and 193 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:31,144 INFO L93 Difference]: Finished difference Result 146 states and 202 transitions. [2022-02-15 01:37:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:37:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:37:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:31,147 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:37:31,147 INFO L226 Difference]: Without dead ends: 139 [2022-02-15 01:37:31,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=2945, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:37:31,148 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:31,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 98 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-15 01:37:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-02-15 01:37:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.4453125) internal successors, (185), 130 states have internal predecessors, (185), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 192 transitions. [2022-02-15 01:37:31,168 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 192 transitions. Word has length 44 [2022-02-15 01:37:31,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:31,169 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 192 transitions. [2022-02-15 01:37:31,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 192 transitions. [2022-02-15 01:37:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:37:31,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:31,169 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:31,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:37:31,169 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:31,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:31,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2074383778, now seen corresponding path program 36 times [2022-02-15 01:37:31,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:31,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303276471] [2022-02-15 01:37:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:31,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:31,302 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:31,302 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:31,302 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:31,302 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:31,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:31,303 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:31,303 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:31,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:31,773 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:31,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303276471] [2022-02-15 01:37:31,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [303276471] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:31,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:31,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:37:31,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320796394] [2022-02-15 01:37:31,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:31,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:37:31,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:37:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:37:31,775 INFO L87 Difference]: Start difference. First operand 136 states and 192 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:32,613 INFO L93 Difference]: Finished difference Result 148 states and 203 transitions. [2022-02-15 01:37:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:37:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:37:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:32,614 INFO L225 Difference]: With dead ends: 148 [2022-02-15 01:37:32,614 INFO L226 Difference]: Without dead ends: 141 [2022-02-15 01:37:32,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:37:32,615 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:32,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 125 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:37:32,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-15 01:37:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-02-15 01:37:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.4375) internal successors, (184), 130 states have internal predecessors, (184), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 191 transitions. [2022-02-15 01:37:32,636 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 191 transitions. Word has length 44 [2022-02-15 01:37:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:32,636 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 191 transitions. [2022-02-15 01:37:32,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 191 transitions. [2022-02-15 01:37:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:37:32,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:32,637 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:32,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:37:32,637 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:32,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1880604774, now seen corresponding path program 37 times [2022-02-15 01:37:32,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:32,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093936029] [2022-02-15 01:37:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:32,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:32,732 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:32,732 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:32,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:32,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:32,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:32,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:32,733 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:32,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:32,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:33,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:33,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093936029] [2022-02-15 01:37:33,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2093936029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:33,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:33,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:37:33,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420807844] [2022-02-15 01:37:33,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:33,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:37:33,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:37:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:37:33,210 INFO L87 Difference]: Start difference. First operand 136 states and 191 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:34,032 INFO L93 Difference]: Finished difference Result 149 states and 203 transitions. [2022-02-15 01:37:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:37:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:37:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:34,033 INFO L225 Difference]: With dead ends: 149 [2022-02-15 01:37:34,033 INFO L226 Difference]: Without dead ends: 142 [2022-02-15 01:37:34,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:37:34,034 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:34,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 112 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:37:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-15 01:37:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-02-15 01:37:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.4296875) internal successors, (183), 130 states have internal predecessors, (183), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2022-02-15 01:37:34,055 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 44 [2022-02-15 01:37:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:34,055 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2022-02-15 01:37:34,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2022-02-15 01:37:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:37:34,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:34,056 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:34,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:37:34,056 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash -287429598, now seen corresponding path program 38 times [2022-02-15 01:37:34,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:34,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149238564] [2022-02-15 01:37:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:34,083 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:34,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:34,161 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:34,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:34,162 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:34,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:34,162 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:34,162 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:34,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:34,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:34,748 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:34,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149238564] [2022-02-15 01:37:34,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1149238564] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:34,748 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:34,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:37:34,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249451807] [2022-02-15 01:37:34,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:34,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:37:34,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:37:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:37:34,749 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:36,052 INFO L93 Difference]: Finished difference Result 199 states and 282 transitions. [2022-02-15 01:37:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:37:36,052 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:37:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:36,053 INFO L225 Difference]: With dead ends: 199 [2022-02-15 01:37:36,053 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:37:36,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=5222, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:37:36,054 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 53 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:36,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 153 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:37:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:37:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2022-02-15 01:37:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 158 states have (on average 1.4683544303797469) internal successors, (232), 160 states have internal predecessors, (232), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 239 transitions. [2022-02-15 01:37:36,081 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 239 transitions. Word has length 44 [2022-02-15 01:37:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:36,081 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 239 transitions. [2022-02-15 01:37:36,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 239 transitions. [2022-02-15 01:37:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:37:36,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:36,081 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:36,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:37:36,082 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:36,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1487577764, now seen corresponding path program 39 times [2022-02-15 01:37:36,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:36,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662830541] [2022-02-15 01:37:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:36,108 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:36,158 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:36,159 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:36,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:36,159 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:36,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:36,159 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:36,159 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:36,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:36,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:36,740 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:36,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662830541] [2022-02-15 01:37:36,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662830541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:36,740 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:36,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:37:36,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818235581] [2022-02-15 01:37:36,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:37:36,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:37:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:37:36,742 INFO L87 Difference]: Start difference. First operand 166 states and 239 transitions. Second operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:37,914 INFO L93 Difference]: Finished difference Result 186 states and 261 transitions. [2022-02-15 01:37:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:37:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:37:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:37,916 INFO L225 Difference]: With dead ends: 186 [2022-02-15 01:37:37,916 INFO L226 Difference]: Without dead ends: 178 [2022-02-15 01:37:37,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=346, Invalid=5816, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:37:37,917 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:37,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 150 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:37:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-15 01:37:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2022-02-15 01:37:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 160 states have (on average 1.4625) internal successors, (234), 162 states have internal predecessors, (234), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2022-02-15 01:37:37,943 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 44 [2022-02-15 01:37:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:37,943 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2022-02-15 01:37:37,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2022-02-15 01:37:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:37:37,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:37,944 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:37,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:37:37,944 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash -2066897826, now seen corresponding path program 40 times [2022-02-15 01:37:37,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:37,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151094825] [2022-02-15 01:37:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:37,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:38,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:38,032 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:38,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:38,032 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:38,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:38,032 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:38,032 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:38,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:38,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:38,363 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:38,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151094825] [2022-02-15 01:37:38,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [151094825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:38,363 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:38,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:37:38,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180545805] [2022-02-15 01:37:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:38,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:37:38,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:38,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:37:38,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:37:38,364 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:38,850 INFO L93 Difference]: Finished difference Result 175 states and 247 transitions. [2022-02-15 01:37:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:37:38,851 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:37:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:38,854 INFO L225 Difference]: With dead ends: 175 [2022-02-15 01:37:38,854 INFO L226 Difference]: Without dead ends: 168 [2022-02-15 01:37:38,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:37:38,855 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:38,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 95 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:37:38,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-15 01:37:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2022-02-15 01:37:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 145 states have internal predecessors, (211), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 218 transitions. [2022-02-15 01:37:38,892 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 218 transitions. Word has length 47 [2022-02-15 01:37:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:38,892 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 218 transitions. [2022-02-15 01:37:38,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 218 transitions. [2022-02-15 01:37:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:37:38,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:38,893 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:38,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:37:38,893 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash -159099366, now seen corresponding path program 41 times [2022-02-15 01:37:38,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:38,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265902947] [2022-02-15 01:37:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:38,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:38,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:38,998 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:38,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:38,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:38,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:38,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:38,998 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:38,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:39,395 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:39,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265902947] [2022-02-15 01:37:39,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [265902947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:39,396 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:39,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:37:39,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380945039] [2022-02-15 01:37:39,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:39,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:37:39,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:39,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:37:39,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:37:39,397 INFO L87 Difference]: Start difference. First operand 151 states and 218 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:40,044 INFO L93 Difference]: Finished difference Result 160 states and 226 transitions. [2022-02-15 01:37:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:37:40,048 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:37:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:40,049 INFO L225 Difference]: With dead ends: 160 [2022-02-15 01:37:40,049 INFO L226 Difference]: Without dead ends: 153 [2022-02-15 01:37:40,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:37:40,050 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:40,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 107 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-15 01:37:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2022-02-15 01:37:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4685314685314685) internal successors, (210), 145 states have internal predecessors, (210), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 217 transitions. [2022-02-15 01:37:40,083 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 217 transitions. Word has length 47 [2022-02-15 01:37:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:40,083 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 217 transitions. [2022-02-15 01:37:40,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 217 transitions. [2022-02-15 01:37:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:37:40,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:40,084 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:40,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:37:40,084 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:40,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:40,085 INFO L85 PathProgramCache]: Analyzing trace with hash -826974754, now seen corresponding path program 42 times [2022-02-15 01:37:40,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:40,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797793190] [2022-02-15 01:37:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:40,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:40,172 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:40,172 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:40,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:40,173 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:40,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:40,173 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:40,173 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:40,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:40,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:40,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:40,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797793190] [2022-02-15 01:37:40,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1797793190] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:40,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:40,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:37:40,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353088062] [2022-02-15 01:37:40,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:40,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:37:40,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:40,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:37:40,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:37:40,608 INFO L87 Difference]: Start difference. First operand 151 states and 217 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:41,355 INFO L93 Difference]: Finished difference Result 162 states and 227 transitions. [2022-02-15 01:37:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:37:41,355 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:37:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:41,356 INFO L225 Difference]: With dead ends: 162 [2022-02-15 01:37:41,356 INFO L226 Difference]: Without dead ends: 155 [2022-02-15 01:37:41,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:37:41,356 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:41,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 114 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:37:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-15 01:37:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-02-15 01:37:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4615384615384615) internal successors, (209), 145 states have internal predecessors, (209), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 216 transitions. [2022-02-15 01:37:41,382 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 216 transitions. Word has length 47 [2022-02-15 01:37:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:41,382 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 216 transitions. [2022-02-15 01:37:41,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 216 transitions. [2022-02-15 01:37:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:37:41,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:41,382 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:41,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:37:41,383 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:41,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1261237094, now seen corresponding path program 43 times [2022-02-15 01:37:41,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:41,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845100321] [2022-02-15 01:37:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:41,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:41,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:41,485 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:41,485 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:41,485 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:41,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:41,486 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:41,486 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:41,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:41,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:41,931 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:41,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845100321] [2022-02-15 01:37:41,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [845100321] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:41,932 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:41,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:37:41,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913482899] [2022-02-15 01:37:41,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:41,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:37:41,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:37:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:37:41,933 INFO L87 Difference]: Start difference. First operand 151 states and 216 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:42,934 INFO L93 Difference]: Finished difference Result 164 states and 228 transitions. [2022-02-15 01:37:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:37:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:37:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:42,935 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:37:42,935 INFO L226 Difference]: Without dead ends: 157 [2022-02-15 01:37:42,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=4391, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:37:42,936 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:42,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 141 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:37:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-15 01:37:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2022-02-15 01:37:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4545454545454546) internal successors, (208), 145 states have internal predecessors, (208), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 215 transitions. [2022-02-15 01:37:42,961 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 215 transitions. Word has length 47 [2022-02-15 01:37:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:42,962 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 215 transitions. [2022-02-15 01:37:42,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 215 transitions. [2022-02-15 01:37:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:37:42,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:42,962 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:42,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:37:42,962 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:42,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1455016098, now seen corresponding path program 44 times [2022-02-15 01:37:42,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:42,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363714607] [2022-02-15 01:37:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:42,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:43,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:43,074 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:43,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:43,074 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:43,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:43,074 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:43,075 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:43,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:43,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:43,633 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:43,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363714607] [2022-02-15 01:37:43,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [363714607] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:43,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:43,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:37:43,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617389691] [2022-02-15 01:37:43,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:43,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:37:43,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:37:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:37:43,635 INFO L87 Difference]: Start difference. First operand 151 states and 215 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:44,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:44,792 INFO L93 Difference]: Finished difference Result 165 states and 228 transitions. [2022-02-15 01:37:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:37:44,792 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:37:44,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:44,793 INFO L225 Difference]: With dead ends: 165 [2022-02-15 01:37:44,793 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:37:44,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=5222, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:37:44,794 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:44,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:37:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:37:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2022-02-15 01:37:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.4475524475524475) internal successors, (207), 145 states have internal predecessors, (207), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 214 transitions. [2022-02-15 01:37:44,819 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 214 transitions. Word has length 47 [2022-02-15 01:37:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:44,819 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 214 transitions. [2022-02-15 01:37:44,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 214 transitions. [2022-02-15 01:37:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:37:44,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:44,820 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:44,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:37:44,820 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash 671916826, now seen corresponding path program 45 times [2022-02-15 01:37:44,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:44,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199296293] [2022-02-15 01:37:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:44,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:44,893 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:44,893 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:44,893 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:44,894 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:44,894 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:44,894 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:44,894 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:44,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:44,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:45,623 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:45,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199296293] [2022-02-15 01:37:45,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199296293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:45,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:45,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:37:45,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083800588] [2022-02-15 01:37:45,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:45,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:37:45,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:45,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:37:45,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:37:45,625 INFO L87 Difference]: Start difference. First operand 151 states and 214 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:47,072 INFO L93 Difference]: Finished difference Result 220 states and 315 transitions. [2022-02-15 01:37:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:37:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:37:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:47,082 INFO L225 Difference]: With dead ends: 220 [2022-02-15 01:37:47,082 INFO L226 Difference]: Without dead ends: 202 [2022-02-15 01:37:47,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=6127, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:37:47,084 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:47,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 155 Invalid, 2522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:37:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-02-15 01:37:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2022-02-15 01:37:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 178 states have internal predecessors, (261), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 268 transitions. [2022-02-15 01:37:47,146 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 268 transitions. Word has length 47 [2022-02-15 01:37:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:47,146 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 268 transitions. [2022-02-15 01:37:47,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 268 transitions. [2022-02-15 01:37:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:37:47,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:47,147 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:47,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:37:47,147 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1848043108, now seen corresponding path program 46 times [2022-02-15 01:37:47,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:47,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897010404] [2022-02-15 01:37:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:47,178 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:47,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:47,270 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:47,270 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:47,270 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:47,270 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:47,270 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:47,270 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:47,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:47,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:47,904 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:47,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897010404] [2022-02-15 01:37:47,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [897010404] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:47,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:47,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 01:37:47,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214055052] [2022-02-15 01:37:47,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:47,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 01:37:47,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 01:37:47,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1765, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:37:47,906 INFO L87 Difference]: Start difference. First operand 184 states and 268 transitions. Second operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:49,238 INFO L93 Difference]: Finished difference Result 205 states and 291 transitions. [2022-02-15 01:37:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:37:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:37:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:49,240 INFO L225 Difference]: With dead ends: 205 [2022-02-15 01:37:49,240 INFO L226 Difference]: Without dead ends: 197 [2022-02-15 01:37:49,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=6765, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 01:37:49,240 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:49,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 161 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:37:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-15 01:37:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 186. [2022-02-15 01:37:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4775280898876404) internal successors, (263), 180 states have internal predecessors, (263), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2022-02-15 01:37:49,272 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 47 [2022-02-15 01:37:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:49,272 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2022-02-15 01:37:49,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2022-02-15 01:37:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:37:49,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:49,273 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:49,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:37:49,273 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:49,273 INFO L85 PathProgramCache]: Analyzing trace with hash -889968026, now seen corresponding path program 47 times [2022-02-15 01:37:49,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:49,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300439447] [2022-02-15 01:37:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:49,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:49,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:49,359 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:49,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:49,359 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:49,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:49,359 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:49,359 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:49,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:49,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:49,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300439447] [2022-02-15 01:37:49,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1300439447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:49,769 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:49,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:37:49,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22288565] [2022-02-15 01:37:49,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:49,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:37:49,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:37:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:37:49,769 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:50,364 INFO L93 Difference]: Finished difference Result 194 states and 277 transitions. [2022-02-15 01:37:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:37:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:37:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:50,365 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:37:50,365 INFO L226 Difference]: Without dead ends: 187 [2022-02-15 01:37:50,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=2945, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:37:50,366 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:50,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 111 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:37:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-02-15 01:37:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-02-15 01:37:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4719101123595506) internal successors, (262), 180 states have internal predecessors, (262), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 269 transitions. [2022-02-15 01:37:50,401 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 269 transitions. Word has length 50 [2022-02-15 01:37:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:50,401 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 269 transitions. [2022-02-15 01:37:50,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 269 transitions. [2022-02-15 01:37:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:37:50,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:50,402 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:50,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:37:50,402 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1017830434, now seen corresponding path program 48 times [2022-02-15 01:37:50,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:50,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429231241] [2022-02-15 01:37:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:50,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:50,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:50,514 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:50,514 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:50,514 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:50,514 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:50,514 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:50,514 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:50,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:50,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:50,964 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:50,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429231241] [2022-02-15 01:37:50,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [429231241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:50,964 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:50,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:37:50,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452826882] [2022-02-15 01:37:50,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:50,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:37:50,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:37:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:37:50,965 INFO L87 Difference]: Start difference. First operand 186 states and 269 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:51,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:51,709 INFO L93 Difference]: Finished difference Result 196 states and 278 transitions. [2022-02-15 01:37:51,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:37:51,709 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:37:51,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:51,710 INFO L225 Difference]: With dead ends: 196 [2022-02-15 01:37:51,710 INFO L226 Difference]: Without dead ends: 189 [2022-02-15 01:37:51,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:37:51,711 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:51,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 123 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:37:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-15 01:37:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2022-02-15 01:37:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4662921348314606) internal successors, (261), 180 states have internal predecessors, (261), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2022-02-15 01:37:51,742 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 50 [2022-02-15 01:37:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:51,742 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2022-02-15 01:37:51,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2022-02-15 01:37:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:37:51,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:51,743 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:51,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:37:51,743 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash 349955046, now seen corresponding path program 49 times [2022-02-15 01:37:51,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:51,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109047947] [2022-02-15 01:37:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:51,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:51,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:51,829 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:51,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:51,829 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:51,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:51,829 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:51,829 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:51,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:52,354 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:52,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109047947] [2022-02-15 01:37:52,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109047947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:52,354 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:52,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:37:52,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130653884] [2022-02-15 01:37:52,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:52,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:37:52,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:37:52,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:37:52,356 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:53,168 INFO L93 Difference]: Finished difference Result 198 states and 279 transitions. [2022-02-15 01:37:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:37:53,168 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:37:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:53,169 INFO L225 Difference]: With dead ends: 198 [2022-02-15 01:37:53,169 INFO L226 Difference]: Without dead ends: 191 [2022-02-15 01:37:53,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:37:53,170 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:53,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 120 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:37:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-02-15 01:37:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2022-02-15 01:37:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4606741573033708) internal successors, (260), 180 states have internal predecessors, (260), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 267 transitions. [2022-02-15 01:37:53,200 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 267 transitions. Word has length 50 [2022-02-15 01:37:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:53,200 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 267 transitions. [2022-02-15 01:37:53,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 267 transitions. [2022-02-15 01:37:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:37:53,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:53,201 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:53,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:37:53,201 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:53,202 INFO L85 PathProgramCache]: Analyzing trace with hash -84307294, now seen corresponding path program 50 times [2022-02-15 01:37:53,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:53,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612968049] [2022-02-15 01:37:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:53,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:53,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:53,293 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:53,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:53,294 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:53,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:53,294 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:53,294 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:53,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:53,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:53,869 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:53,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612968049] [2022-02-15 01:37:53,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1612968049] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:53,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:53,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:37:53,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659930682] [2022-02-15 01:37:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:53,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:37:53,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:37:53,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:37:53,871 INFO L87 Difference]: Start difference. First operand 186 states and 267 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:54,958 INFO L93 Difference]: Finished difference Result 200 states and 280 transitions. [2022-02-15 01:37:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:37:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:37:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:54,960 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:37:54,960 INFO L226 Difference]: Without dead ends: 193 [2022-02-15 01:37:54,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:37:54,961 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:54,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 152 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:37:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-15 01:37:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-02-15 01:37:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.4550561797752808) internal successors, (259), 180 states have internal predecessors, (259), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 266 transitions. [2022-02-15 01:37:55,005 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 266 transitions. Word has length 50 [2022-02-15 01:37:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:55,005 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 266 transitions. [2022-02-15 01:37:55,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 266 transitions. [2022-02-15 01:37:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:37:55,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:55,006 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:55,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:37:55,006 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:55,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash -278086298, now seen corresponding path program 51 times [2022-02-15 01:37:55,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:55,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884001157] [2022-02-15 01:37:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:55,038 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:55,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:55,109 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:55,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:55,109 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:55,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:55,109 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:55,110 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:55,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:55,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:55,736 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:55,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884001157] [2022-02-15 01:37:55,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [884001157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:55,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:55,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:37:55,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623025708] [2022-02-15 01:37:55,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:55,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:37:55,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:37:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:37:55,737 INFO L87 Difference]: Start difference. First operand 186 states and 266 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:56,984 INFO L93 Difference]: Finished difference Result 201 states and 280 transitions. [2022-02-15 01:37:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:37:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:37:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:56,985 INFO L225 Difference]: With dead ends: 201 [2022-02-15 01:37:56,985 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:37:56,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:37:56,986 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:56,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 164 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:37:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:37:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2022-02-15 01:37:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.449438202247191) internal successors, (258), 180 states have internal predecessors, (258), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 265 transitions. [2022-02-15 01:37:57,017 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 265 transitions. Word has length 50 [2022-02-15 01:37:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:57,018 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 265 transitions. [2022-02-15 01:37:57,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 265 transitions. [2022-02-15 01:37:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:37:57,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:57,018 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:57,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:37:57,018 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:57,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:57,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1848846626, now seen corresponding path program 52 times [2022-02-15 01:37:57,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:57,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144533626] [2022-02-15 01:37:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:57,042 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:57,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:57,094 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:57,095 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:57,095 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:57,095 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:57,095 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:57,095 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:57,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:57,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:57,871 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:57,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144533626] [2022-02-15 01:37:57,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [144533626] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:57,871 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:57,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:37:57,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416759454] [2022-02-15 01:37:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:57,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:37:57,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:37:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:37:57,873 INFO L87 Difference]: Start difference. First operand 186 states and 265 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:59,379 INFO L93 Difference]: Finished difference Result 261 states and 375 transitions. [2022-02-15 01:37:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:37:59,379 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:37:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:59,381 INFO L225 Difference]: With dead ends: 261 [2022-02-15 01:37:59,381 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:37:59,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:37:59,382 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2612 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:59,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 157 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2612 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:37:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:37:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 222. [2022-02-15 01:37:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 214 states have (on average 1.4813084112149533) internal successors, (317), 216 states have internal predecessors, (317), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:37:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 324 transitions. [2022-02-15 01:37:59,422 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 324 transitions. Word has length 50 [2022-02-15 01:37:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:59,422 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 324 transitions. [2022-02-15 01:37:59,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 324 transitions. [2022-02-15 01:37:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:37:59,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:59,422 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:59,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:37:59,423 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash -671113308, now seen corresponding path program 53 times [2022-02-15 01:37:59,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:59,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246502707] [2022-02-15 01:37:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:59,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:59,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:37:59,526 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:59,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:59,526 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:59,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:59,526 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:37:59,526 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:37:59,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:59,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:00,232 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:00,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246502707] [2022-02-15 01:38:00,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [246502707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:00,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:00,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 01:38:00,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252326049] [2022-02-15 01:38:00,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:00,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 01:38:00,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:00,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 01:38:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2026, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:38:00,234 INFO L87 Difference]: Start difference. First operand 222 states and 324 transitions. Second operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:01,806 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2022-02-15 01:38:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 01:38:01,806 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:38:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:01,807 INFO L225 Difference]: With dead ends: 244 [2022-02-15 01:38:01,808 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:38:01,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=402, Invalid=7788, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 01:38:01,808 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:01,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 157 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:38:01,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:38:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 224. [2022-02-15 01:38:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 216 states have (on average 1.4768518518518519) internal successors, (319), 218 states have internal predecessors, (319), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 326 transitions. [2022-02-15 01:38:01,859 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 326 transitions. Word has length 50 [2022-02-15 01:38:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:01,860 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 326 transitions. [2022-02-15 01:38:01,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 326 transitions. [2022-02-15 01:38:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:38:01,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:01,860 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:01,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:38:01,861 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:01,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1285972634, now seen corresponding path program 54 times [2022-02-15 01:38:01,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:01,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330144998] [2022-02-15 01:38:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:01,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:01,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:01,992 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:01,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:01,993 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:01,993 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:01,993 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:01,993 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:01,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:02,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:02,449 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:02,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330144998] [2022-02-15 01:38:02,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330144998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:02,449 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:02,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:38:02,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136786136] [2022-02-15 01:38:02,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:02,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:38:02,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:38:02,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:38:02,450 INFO L87 Difference]: Start difference. First operand 224 states and 326 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:03,098 INFO L93 Difference]: Finished difference Result 231 states and 332 transitions. [2022-02-15 01:38:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:38:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:38:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:03,099 INFO L225 Difference]: With dead ends: 231 [2022-02-15 01:38:03,099 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:38:03,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:38:03,100 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:03,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 110 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:38:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:38:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 204. [2022-02-15 01:38:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.489795918367347) internal successors, (292), 198 states have internal predecessors, (292), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 299 transitions. [2022-02-15 01:38:03,147 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 299 transitions. Word has length 53 [2022-02-15 01:38:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:03,147 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 299 transitions. [2022-02-15 01:38:03,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 299 transitions. [2022-02-15 01:38:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:38:03,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:03,148 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:03,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:38:03,148 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1207666526, now seen corresponding path program 55 times [2022-02-15 01:38:03,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:03,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617564551] [2022-02-15 01:38:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:03,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:03,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:03,232 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:03,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:03,233 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:03,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:03,233 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:03,233 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:03,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:03,701 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:03,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617564551] [2022-02-15 01:38:03,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617564551] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:03,702 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:03,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:38:03,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219381812] [2022-02-15 01:38:03,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:03,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:38:03,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:03,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:38:03,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:38:03,703 INFO L87 Difference]: Start difference. First operand 204 states and 299 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:04,455 INFO L93 Difference]: Finished difference Result 213 states and 307 transitions. [2022-02-15 01:38:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:38:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:38:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:04,456 INFO L225 Difference]: With dead ends: 213 [2022-02-15 01:38:04,456 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:38:04,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:38:04,457 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:04,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 117 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:38:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:38:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-02-15 01:38:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 198 states have internal predecessors, (291), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 298 transitions. [2022-02-15 01:38:04,505 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 298 transitions. Word has length 53 [2022-02-15 01:38:04,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:04,505 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 298 transitions. [2022-02-15 01:38:04,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 298 transitions. [2022-02-15 01:38:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:38:04,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:04,506 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:04,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:38:04,506 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:04,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1179502310, now seen corresponding path program 56 times [2022-02-15 01:38:04,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:04,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524913578] [2022-02-15 01:38:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:04,552 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:04,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:04,627 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:04,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:04,628 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:04,628 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:04,628 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:04,628 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:04,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:04,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:05,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:05,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524913578] [2022-02-15 01:38:05,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [524913578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:05,131 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:05,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:38:05,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644478033] [2022-02-15 01:38:05,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:05,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:38:05,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:38:05,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:38:05,132 INFO L87 Difference]: Start difference. First operand 204 states and 298 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:06,003 INFO L93 Difference]: Finished difference Result 215 states and 308 transitions. [2022-02-15 01:38:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:38:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:38:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:06,005 INFO L225 Difference]: With dead ends: 215 [2022-02-15 01:38:06,005 INFO L226 Difference]: Without dead ends: 208 [2022-02-15 01:38:06,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:38:06,006 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:06,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 119 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:38:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-15 01:38:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2022-02-15 01:38:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.4795918367346939) internal successors, (290), 198 states have internal predecessors, (290), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 297 transitions. [2022-02-15 01:38:06,055 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 297 transitions. Word has length 53 [2022-02-15 01:38:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:06,056 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 297 transitions. [2022-02-15 01:38:06,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 297 transitions. [2022-02-15 01:38:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:38:06,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:06,056 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:06,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:38:06,057 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:06,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1847377698, now seen corresponding path program 57 times [2022-02-15 01:38:06,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:06,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301144388] [2022-02-15 01:38:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:06,083 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:06,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:06,161 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:06,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:06,161 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:06,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:06,161 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:06,161 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:06,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:06,769 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:06,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301144388] [2022-02-15 01:38:06,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301144388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:06,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:06,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:38:06,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053039295] [2022-02-15 01:38:06,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:06,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:38:06,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:38:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:38:06,771 INFO L87 Difference]: Start difference. First operand 204 states and 297 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:07,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:07,841 INFO L93 Difference]: Finished difference Result 217 states and 309 transitions. [2022-02-15 01:38:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:38:07,842 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:38:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:07,843 INFO L225 Difference]: With dead ends: 217 [2022-02-15 01:38:07,843 INFO L226 Difference]: Without dead ends: 210 [2022-02-15 01:38:07,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=5222, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:38:07,844 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:07,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 146 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:38:07,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-15 01:38:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-02-15 01:38:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.4744897959183674) internal successors, (289), 198 states have internal predecessors, (289), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 296 transitions. [2022-02-15 01:38:07,888 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 296 transitions. Word has length 53 [2022-02-15 01:38:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:07,889 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 296 transitions. [2022-02-15 01:38:07,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 296 transitions. [2022-02-15 01:38:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:38:07,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:07,889 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:07,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:38:07,889 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2013327258, now seen corresponding path program 58 times [2022-02-15 01:38:07,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:07,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779932743] [2022-02-15 01:38:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:07,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:07,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:07,992 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:07,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:07,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:07,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:07,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:07,992 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:07,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:08,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:08,618 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:08,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779932743] [2022-02-15 01:38:08,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779932743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:08,618 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:08,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:38:08,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530698611] [2022-02-15 01:38:08,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:08,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:38:08,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:08,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:38:08,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:38:08,620 INFO L87 Difference]: Start difference. First operand 204 states and 296 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:09,905 INFO L93 Difference]: Finished difference Result 219 states and 310 transitions. [2022-02-15 01:38:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:38:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:38:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:09,907 INFO L225 Difference]: With dead ends: 219 [2022-02-15 01:38:09,907 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:38:09,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:38:09,908 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:09,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 158 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:38:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:38:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2022-02-15 01:38:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.469387755102041) internal successors, (288), 198 states have internal predecessors, (288), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2022-02-15 01:38:09,974 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 53 [2022-02-15 01:38:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:09,974 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2022-02-15 01:38:09,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2022-02-15 01:38:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:38:09,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:09,975 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:09,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:38:09,975 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:09,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1819548254, now seen corresponding path program 59 times [2022-02-15 01:38:09,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:09,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430490954] [2022-02-15 01:38:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:10,018 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:10,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:10,112 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:10,113 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:10,113 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:10,113 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:10,113 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:10,113 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:10,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:10,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:10,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:10,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430490954] [2022-02-15 01:38:10,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430490954] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:10,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:10,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:38:10,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950749565] [2022-02-15 01:38:10,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:10,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:38:10,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:10,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:38:10,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:38:10,831 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:12,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:12,009 INFO L93 Difference]: Finished difference Result 220 states and 310 transitions. [2022-02-15 01:38:12,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:38:12,009 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:38:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:12,010 INFO L225 Difference]: With dead ends: 220 [2022-02-15 01:38:12,010 INFO L226 Difference]: Without dead ends: 213 [2022-02-15 01:38:12,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2591 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:38:12,012 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:12,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 135 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:38:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-15 01:38:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 204. [2022-02-15 01:38:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.4642857142857142) internal successors, (287), 198 states have internal predecessors, (287), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2022-02-15 01:38:12,062 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 53 [2022-02-15 01:38:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:12,062 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2022-02-15 01:38:12,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2022-02-15 01:38:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:38:12,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:12,063 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:12,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:38:12,063 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:12,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:12,063 INFO L85 PathProgramCache]: Analyzing trace with hash -348486118, now seen corresponding path program 60 times [2022-02-15 01:38:12,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:12,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667692477] [2022-02-15 01:38:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:12,097 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:12,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:12,146 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:12,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:12,147 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:12,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:12,147 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:12,147 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:12,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:12,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:12,886 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:12,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667692477] [2022-02-15 01:38:12,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [667692477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:12,886 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:12,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:38:12,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613604037] [2022-02-15 01:38:12,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:12,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:38:12,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:12,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:38:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:38:12,887 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:14,688 INFO L93 Difference]: Finished difference Result 285 states and 413 transitions. [2022-02-15 01:38:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:38:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:38:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:14,689 INFO L225 Difference]: With dead ends: 285 [2022-02-15 01:38:14,690 INFO L226 Difference]: Without dead ends: 265 [2022-02-15 01:38:14,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=8147, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:38:14,691 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3256 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:14,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 179 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3256 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:38:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-15 01:38:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 243. [2022-02-15 01:38:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 235 states have (on average 1.4936170212765958) internal successors, (351), 237 states have internal predecessors, (351), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-02-15 01:38:14,745 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 53 [2022-02-15 01:38:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:14,746 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-02-15 01:38:14,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-02-15 01:38:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:38:14,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:14,746 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:14,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:38:14,746 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1426521244, now seen corresponding path program 61 times [2022-02-15 01:38:14,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:14,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504424696] [2022-02-15 01:38:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:14,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:14,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:14,848 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:14,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:14,848 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:14,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:14,848 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:14,849 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:14,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:14,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:15,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:15,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504424696] [2022-02-15 01:38:15,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1504424696] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:15,663 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:15,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-15 01:38:15,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844053327] [2022-02-15 01:38:15,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:15,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-15 01:38:15,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-15 01:38:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:38:15,664 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:17,520 INFO L93 Difference]: Finished difference Result 266 states and 383 transitions. [2022-02-15 01:38:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:38:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:38:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:17,521 INFO L225 Difference]: With dead ends: 266 [2022-02-15 01:38:17,521 INFO L226 Difference]: Without dead ends: 258 [2022-02-15 01:38:17,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=429, Invalid=8883, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:38:17,522 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 3168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:17,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 188 Invalid, 3168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:38:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-15 01:38:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 245. [2022-02-15 01:38:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.489451476793249) internal successors, (353), 239 states have internal predecessors, (353), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 360 transitions. [2022-02-15 01:38:17,574 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 360 transitions. Word has length 53 [2022-02-15 01:38:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:17,574 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 360 transitions. [2022-02-15 01:38:17,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 360 transitions. [2022-02-15 01:38:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:38:17,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:17,574 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:17,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:38:17,575 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:17,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:17,575 INFO L85 PathProgramCache]: Analyzing trace with hash 142754466, now seen corresponding path program 62 times [2022-02-15 01:38:17,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:17,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204866541] [2022-02-15 01:38:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:17,603 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:17,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:17,677 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:17,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:17,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:17,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:17,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:17,678 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:17,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:17,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:18,175 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:18,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204866541] [2022-02-15 01:38:18,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1204866541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:18,175 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:18,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:38:18,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205284146] [2022-02-15 01:38:18,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:18,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:38:18,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:18,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:38:18,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:38:18,176 INFO L87 Difference]: Start difference. First operand 245 states and 360 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:18,869 INFO L93 Difference]: Finished difference Result 253 states and 367 transitions. [2022-02-15 01:38:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:38:18,869 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:38:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:18,871 INFO L225 Difference]: With dead ends: 253 [2022-02-15 01:38:18,871 INFO L226 Difference]: Without dead ends: 246 [2022-02-15 01:38:18,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=3630, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:38:18,872 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:18,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 96 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:38:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-02-15 01:38:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2022-02-15 01:38:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4852320675105486) internal successors, (352), 239 states have internal predecessors, (352), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 359 transitions. [2022-02-15 01:38:18,941 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 359 transitions. Word has length 56 [2022-02-15 01:38:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:18,941 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 359 transitions. [2022-02-15 01:38:18,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 359 transitions. [2022-02-15 01:38:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:38:18,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:18,942 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:18,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:38:18,942 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash 64448358, now seen corresponding path program 63 times [2022-02-15 01:38:18,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:18,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720623619] [2022-02-15 01:38:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:18,971 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:19,037 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:19,037 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:19,038 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:19,038 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:19,038 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:19,038 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:19,038 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:19,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:19,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:19,567 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:19,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720623619] [2022-02-15 01:38:19,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720623619] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:19,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:19,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:38:19,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129178700] [2022-02-15 01:38:19,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:19,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:38:19,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:38:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:38:19,568 INFO L87 Difference]: Start difference. First operand 245 states and 359 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:20,375 INFO L93 Difference]: Finished difference Result 255 states and 368 transitions. [2022-02-15 01:38:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:38:20,375 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:38:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:20,376 INFO L225 Difference]: With dead ends: 255 [2022-02-15 01:38:20,376 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:38:20,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:38:20,377 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:20,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 103 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:38:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:38:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 245. [2022-02-15 01:38:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.481012658227848) internal successors, (351), 239 states have internal predecessors, (351), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 358 transitions. [2022-02-15 01:38:20,425 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 358 transitions. Word has length 56 [2022-02-15 01:38:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:20,425 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 358 transitions. [2022-02-15 01:38:20,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 358 transitions. [2022-02-15 01:38:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:38:20,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:20,426 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:20,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:38:20,426 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1972246818, now seen corresponding path program 64 times [2022-02-15 01:38:20,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:20,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56329675] [2022-02-15 01:38:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:20,463 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:20,518 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:20,518 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:20,518 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:20,518 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:20,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:20,519 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:20,519 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:20,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:20,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:21,150 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:21,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56329675] [2022-02-15 01:38:21,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [56329675] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:21,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:21,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:38:21,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161522956] [2022-02-15 01:38:21,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:21,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:38:21,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:21,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:38:21,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:38:21,152 INFO L87 Difference]: Start difference. First operand 245 states and 358 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:22,162 INFO L93 Difference]: Finished difference Result 257 states and 369 transitions. [2022-02-15 01:38:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:38:22,162 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:38:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:22,164 INFO L225 Difference]: With dead ends: 257 [2022-02-15 01:38:22,164 INFO L226 Difference]: Without dead ends: 250 [2022-02-15 01:38:22,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=328, Invalid=5222, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:38:22,165 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:22,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 125 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:38:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-15 01:38:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2022-02-15 01:38:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4767932489451476) internal successors, (350), 239 states have internal predecessors, (350), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 357 transitions. [2022-02-15 01:38:22,229 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 357 transitions. Word has length 56 [2022-02-15 01:38:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:22,229 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 357 transitions. [2022-02-15 01:38:22,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 357 transitions. [2022-02-15 01:38:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:38:22,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:22,230 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:22,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:38:22,230 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:22,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1304371430, now seen corresponding path program 65 times [2022-02-15 01:38:22,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:22,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719219446] [2022-02-15 01:38:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:22,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:22,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:22,343 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:22,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:22,344 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:22,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:22,344 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:22,344 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:22,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:22,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:23,012 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:23,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719219446] [2022-02-15 01:38:23,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1719219446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:23,013 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:23,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:38:23,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744903317] [2022-02-15 01:38:23,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:23,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:38:23,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:23,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:38:23,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:38:23,014 INFO L87 Difference]: Start difference. First operand 245 states and 357 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:24,198 INFO L93 Difference]: Finished difference Result 259 states and 370 transitions. [2022-02-15 01:38:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:38:24,198 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:38:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:24,199 INFO L225 Difference]: With dead ends: 259 [2022-02-15 01:38:24,199 INFO L226 Difference]: Without dead ends: 252 [2022-02-15 01:38:24,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:38:24,200 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:24,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 137 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:38:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-15 01:38:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2022-02-15 01:38:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4725738396624473) internal successors, (349), 239 states have internal predecessors, (349), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 356 transitions. [2022-02-15 01:38:24,272 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 356 transitions. Word has length 56 [2022-02-15 01:38:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:24,272 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 356 transitions. [2022-02-15 01:38:24,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 356 transitions. [2022-02-15 01:38:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:38:24,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:24,272 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:24,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:38:24,273 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:24,273 INFO L85 PathProgramCache]: Analyzing trace with hash 870109090, now seen corresponding path program 66 times [2022-02-15 01:38:24,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:24,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053078845] [2022-02-15 01:38:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:24,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:24,396 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:24,397 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:24,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:24,397 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:24,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:24,397 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:24,397 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:24,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:25,135 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:25,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053078845] [2022-02-15 01:38:25,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053078845] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:25,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:25,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:38:25,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140664618] [2022-02-15 01:38:25,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:25,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:38:25,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:25,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:38:25,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:38:25,137 INFO L87 Difference]: Start difference. First operand 245 states and 356 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:26,548 INFO L93 Difference]: Finished difference Result 261 states and 371 transitions. [2022-02-15 01:38:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:38:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:38:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:26,550 INFO L225 Difference]: With dead ends: 261 [2022-02-15 01:38:26,550 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:38:26,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2549 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:38:26,551 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:26,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 164 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:38:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:38:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2022-02-15 01:38:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4683544303797469) internal successors, (348), 239 states have internal predecessors, (348), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 355 transitions. [2022-02-15 01:38:26,615 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 355 transitions. Word has length 56 [2022-02-15 01:38:26,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:26,616 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 355 transitions. [2022-02-15 01:38:26,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 355 transitions. [2022-02-15 01:38:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:38:26,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:26,616 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:26,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:38:26,616 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash 676330086, now seen corresponding path program 67 times [2022-02-15 01:38:26,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:26,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562032070] [2022-02-15 01:38:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:26,660 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:26,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:26,713 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:26,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:26,713 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:26,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:26,713 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:26,713 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:26,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:26,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:27,502 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:27,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562032070] [2022-02-15 01:38:27,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [562032070] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:27,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:27,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:38:27,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332093265] [2022-02-15 01:38:27,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:27,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:38:27,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:38:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:38:27,504 INFO L87 Difference]: Start difference. First operand 245 states and 355 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:28,913 INFO L93 Difference]: Finished difference Result 262 states and 371 transitions. [2022-02-15 01:38:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:38:28,914 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:38:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:28,915 INFO L225 Difference]: With dead ends: 262 [2022-02-15 01:38:28,915 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 01:38:28,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:38:28,916 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2247 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:28,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 151 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:38:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 01:38:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 245. [2022-02-15 01:38:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.4641350210970465) internal successors, (347), 239 states have internal predecessors, (347), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 354 transitions. [2022-02-15 01:38:28,965 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 354 transitions. Word has length 56 [2022-02-15 01:38:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:28,966 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 354 transitions. [2022-02-15 01:38:28,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 354 transitions. [2022-02-15 01:38:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:38:28,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:28,968 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:28,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:38:28,968 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:28,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:28,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1491704286, now seen corresponding path program 68 times [2022-02-15 01:38:28,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:28,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766502892] [2022-02-15 01:38:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:28,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:29,043 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:29,043 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:29,044 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:29,044 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:29,044 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:29,044 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:29,044 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:29,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:29,084 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 01:38:29,873 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:29,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766502892] [2022-02-15 01:38:29,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [766502892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:29,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:29,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:38:29,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896005316] [2022-02-15 01:38:29,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:29,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:38:29,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:29,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:38:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:38:29,874 INFO L87 Difference]: Start difference. First operand 245 states and 354 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:31,875 INFO L93 Difference]: Finished difference Result 332 states and 482 transitions. [2022-02-15 01:38:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:38:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:38:31,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:31,877 INFO L225 Difference]: With dead ends: 332 [2022-02-15 01:38:31,877 INFO L226 Difference]: Without dead ends: 311 [2022-02-15 01:38:31,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3440 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:38:31,878 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 61 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3608 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:31,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 186 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3608 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:38:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-15 01:38:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2022-02-15 01:38:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 279 states have (on average 1.4910394265232976) internal successors, (416), 281 states have internal predecessors, (416), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 423 transitions. [2022-02-15 01:38:31,951 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 423 transitions. Word has length 56 [2022-02-15 01:38:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:31,951 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 423 transitions. [2022-02-15 01:38:31,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 423 transitions. [2022-02-15 01:38:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:38:31,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:31,953 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:31,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:38:31,953 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash 283303076, now seen corresponding path program 69 times [2022-02-15 01:38:31,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:31,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704190323] [2022-02-15 01:38:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:32,015 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:32,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:32,067 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:32,067 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:32,067 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:32,067 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:32,067 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:32,068 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:32,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:33,005 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:33,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704190323] [2022-02-15 01:38:33,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1704190323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:33,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:33,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 01:38:33,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367064934] [2022-02-15 01:38:33,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:33,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 01:38:33,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:33,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 01:38:33,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:38:33,007 INFO L87 Difference]: Start difference. First operand 287 states and 423 transitions. Second operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:35,109 INFO L93 Difference]: Finished difference Result 311 states and 449 transitions. [2022-02-15 01:38:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:38:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:38:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:35,111 INFO L225 Difference]: With dead ends: 311 [2022-02-15 01:38:35,111 INFO L226 Difference]: Without dead ends: 303 [2022-02-15 01:38:35,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3800 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=456, Invalid=10050, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:38:35,112 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3266 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:35,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 189 Invalid, 3375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3266 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:38:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-15 01:38:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 289. [2022-02-15 01:38:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 281 states have (on average 1.4875444839857652) internal successors, (418), 283 states have internal predecessors, (418), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 425 transitions. [2022-02-15 01:38:35,169 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 425 transitions. Word has length 56 [2022-02-15 01:38:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:35,169 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 425 transitions. [2022-02-15 01:38:35,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 425 transitions. [2022-02-15 01:38:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:38:35,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:35,170 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:35,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:38:35,170 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2023976738, now seen corresponding path program 70 times [2022-02-15 01:38:35,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:35,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943197517] [2022-02-15 01:38:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:35,214 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:35,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:35,281 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:35,281 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:35,281 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:35,281 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:35,281 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:35,281 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:35,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:35,796 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:35,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943197517] [2022-02-15 01:38:35,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [943197517] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:35,796 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:35,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:38:35,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081272676] [2022-02-15 01:38:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:35,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:38:35,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:38:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:38:35,797 INFO L87 Difference]: Start difference. First operand 289 states and 425 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:36,520 INFO L93 Difference]: Finished difference Result 296 states and 431 transitions. [2022-02-15 01:38:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:38:36,521 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:38:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:36,522 INFO L225 Difference]: With dead ends: 296 [2022-02-15 01:38:36,522 INFO L226 Difference]: Without dead ends: 289 [2022-02-15 01:38:36,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:38:36,522 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:36,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 100 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:38:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-15 01:38:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 266. [2022-02-15 01:38:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.5) internal successors, (387), 260 states have internal predecessors, (387), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 394 transitions. [2022-02-15 01:38:36,577 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 394 transitions. Word has length 59 [2022-02-15 01:38:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:36,577 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 394 transitions. [2022-02-15 01:38:36,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 394 transitions. [2022-02-15 01:38:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:38:36,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:36,577 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:36,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:38:36,578 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1620968858, now seen corresponding path program 71 times [2022-02-15 01:38:36,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:36,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823138462] [2022-02-15 01:38:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:36,616 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:36,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:36,672 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:36,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:36,673 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:36,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:36,673 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:36,673 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:36,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:37,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:37,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823138462] [2022-02-15 01:38:37,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [823138462] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:37,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:37,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:38:37,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76907736] [2022-02-15 01:38:37,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:37,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:38:37,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:37,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:38:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:38:37,194 INFO L87 Difference]: Start difference. First operand 266 states and 394 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:38,052 INFO L93 Difference]: Finished difference Result 275 states and 402 transitions. [2022-02-15 01:38:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:38:38,052 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:38:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:38,053 INFO L225 Difference]: With dead ends: 275 [2022-02-15 01:38:38,053 INFO L226 Difference]: Without dead ends: 268 [2022-02-15 01:38:38,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:38:38,054 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:38,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 127 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:38:38,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-02-15 01:38:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2022-02-15 01:38:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.496124031007752) internal successors, (386), 260 states have internal predecessors, (386), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 393 transitions. [2022-02-15 01:38:38,110 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 393 transitions. Word has length 59 [2022-02-15 01:38:38,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:38,111 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 393 transitions. [2022-02-15 01:38:38,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:38,111 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 393 transitions. [2022-02-15 01:38:38,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:38:38,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:38,111 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:38,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:38:38,111 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:38,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1542662750, now seen corresponding path program 72 times [2022-02-15 01:38:38,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:38,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241573758] [2022-02-15 01:38:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:38,151 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:38,219 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:38,219 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:38,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:38,220 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:38,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:38,220 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:38,220 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:38,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:38,821 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:38,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241573758] [2022-02-15 01:38:38,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [241573758] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:38,822 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:38,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:38:38,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610688115] [2022-02-15 01:38:38,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:38,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:38:38,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:38,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:38:38,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:38:38,823 INFO L87 Difference]: Start difference. First operand 266 states and 393 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:39,915 INFO L93 Difference]: Finished difference Result 277 states and 403 transitions. [2022-02-15 01:38:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:38:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:38:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:39,916 INFO L225 Difference]: With dead ends: 277 [2022-02-15 01:38:39,916 INFO L226 Difference]: Without dead ends: 270 [2022-02-15 01:38:39,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:38:39,917 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:39,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 144 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:38:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-02-15 01:38:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2022-02-15 01:38:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4922480620155039) internal successors, (385), 260 states have internal predecessors, (385), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 392 transitions. [2022-02-15 01:38:39,971 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 392 transitions. Word has length 59 [2022-02-15 01:38:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:39,971 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 392 transitions. [2022-02-15 01:38:39,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 392 transitions. [2022-02-15 01:38:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:38:39,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:39,972 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:39,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:38:39,972 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:39,972 INFO L85 PathProgramCache]: Analyzing trace with hash -844506086, now seen corresponding path program 73 times [2022-02-15 01:38:39,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:39,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525776103] [2022-02-15 01:38:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:40,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:40,056 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:40,056 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:40,056 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:40,057 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:40,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:40,057 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:40,057 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:40,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:40,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:40,677 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:40,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525776103] [2022-02-15 01:38:40,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1525776103] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:40,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:40,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:38:40,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787488326] [2022-02-15 01:38:40,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:40,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:38:40,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:38:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:38:40,679 INFO L87 Difference]: Start difference. First operand 266 states and 392 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:41,843 INFO L93 Difference]: Finished difference Result 279 states and 404 transitions. [2022-02-15 01:38:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:38:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:38:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:41,845 INFO L225 Difference]: With dead ends: 279 [2022-02-15 01:38:41,845 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 01:38:41,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:38:41,846 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:41,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 156 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:38:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 01:38:41,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 266. [2022-02-15 01:38:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 260 states have internal predecessors, (384), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 391 transitions. [2022-02-15 01:38:41,907 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 391 transitions. Word has length 59 [2022-02-15 01:38:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:41,907 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 391 transitions. [2022-02-15 01:38:41,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 391 transitions. [2022-02-15 01:38:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:38:41,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:41,908 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:41,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 01:38:41,908 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:41,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:41,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1512381474, now seen corresponding path program 74 times [2022-02-15 01:38:41,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:41,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086768277] [2022-02-15 01:38:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:41,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:41,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:41,993 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:41,993 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:41,993 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:41,993 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:41,993 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:41,993 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:41,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:42,035 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 01:38:42,692 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:42,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086768277] [2022-02-15 01:38:42,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086768277] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:42,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:42,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:38:42,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6076956] [2022-02-15 01:38:42,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:42,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:38:42,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:38:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:38:42,693 INFO L87 Difference]: Start difference. First operand 266 states and 391 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:43,985 INFO L93 Difference]: Finished difference Result 281 states and 405 transitions. [2022-02-15 01:38:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:38:43,985 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:38:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:43,986 INFO L225 Difference]: With dead ends: 281 [2022-02-15 01:38:43,986 INFO L226 Difference]: Without dead ends: 274 [2022-02-15 01:38:43,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:38:43,988 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:43,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 153 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:38:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-02-15 01:38:44,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 266. [2022-02-15 01:38:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4844961240310077) internal successors, (383), 260 states have internal predecessors, (383), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 390 transitions. [2022-02-15 01:38:44,050 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 390 transitions. Word has length 59 [2022-02-15 01:38:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:44,050 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 390 transitions. [2022-02-15 01:38:44,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:44,050 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 390 transitions. [2022-02-15 01:38:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:38:44,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:44,050 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:44,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 01:38:44,051 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:44,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1946643814, now seen corresponding path program 75 times [2022-02-15 01:38:44,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:44,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017624685] [2022-02-15 01:38:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:44,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:44,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:44,133 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:44,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:44,134 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:44,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:44,134 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:44,134 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:44,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:44,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:44,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:44,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017624685] [2022-02-15 01:38:44,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017624685] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:44,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:44,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:38:44,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592335675] [2022-02-15 01:38:44,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:44,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:38:44,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:44,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:38:44,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:38:44,874 INFO L87 Difference]: Start difference. First operand 266 states and 390 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:46,363 INFO L93 Difference]: Finished difference Result 283 states and 406 transitions. [2022-02-15 01:38:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:38:46,364 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:38:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:46,365 INFO L225 Difference]: With dead ends: 283 [2022-02-15 01:38:46,365 INFO L226 Difference]: Without dead ends: 276 [2022-02-15 01:38:46,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2995 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:38:46,366 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:46,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 150 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:38:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-15 01:38:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 266. [2022-02-15 01:38:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4806201550387597) internal successors, (382), 260 states have internal predecessors, (382), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 389 transitions. [2022-02-15 01:38:46,434 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 389 transitions. Word has length 59 [2022-02-15 01:38:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:46,434 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 389 transitions. [2022-02-15 01:38:46,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 389 transitions. [2022-02-15 01:38:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:38:46,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:46,434 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:46,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 01:38:46,435 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2140422818, now seen corresponding path program 76 times [2022-02-15 01:38:46,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:46,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242143295] [2022-02-15 01:38:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:46,462 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:46,531 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:46,531 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:46,531 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:46,532 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:46,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:46,532 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:46,532 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:46,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:46,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:47,389 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:47,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242143295] [2022-02-15 01:38:47,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [242143295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:47,389 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:47,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:38:47,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462243419] [2022-02-15 01:38:47,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:47,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:38:47,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:38:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:38:47,390 INFO L87 Difference]: Start difference. First operand 266 states and 389 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:49,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:49,197 INFO L93 Difference]: Finished difference Result 284 states and 406 transitions. [2022-02-15 01:38:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:38:49,197 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:38:49,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:49,198 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:38:49,198 INFO L226 Difference]: Without dead ends: 277 [2022-02-15 01:38:49,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3439 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:38:49,199 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 63 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 3048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:49,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 182 Invalid, 3048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:38:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-15 01:38:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 266. [2022-02-15 01:38:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 258 states have (on average 1.4767441860465116) internal successors, (381), 260 states have internal predecessors, (381), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 388 transitions. [2022-02-15 01:38:49,278 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 388 transitions. Word has length 59 [2022-02-15 01:38:49,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:49,278 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 388 transitions. [2022-02-15 01:38:49,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 388 transitions. [2022-02-15 01:38:49,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:38:49,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:49,279 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:49,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 01:38:49,279 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash -13489894, now seen corresponding path program 77 times [2022-02-15 01:38:49,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:49,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394789206] [2022-02-15 01:38:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:49,308 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:49,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:49,385 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:49,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:49,385 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:49,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:49,386 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:49,386 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:49,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:49,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:50,273 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:50,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394789206] [2022-02-15 01:38:50,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394789206] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:50,274 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:50,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:38:50,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020261367] [2022-02-15 01:38:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:50,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:38:50,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:50,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:38:50,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:38:50,275 INFO L87 Difference]: Start difference. First operand 266 states and 388 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:52,606 INFO L93 Difference]: Finished difference Result 359 states and 525 transitions. [2022-02-15 01:38:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:38:52,606 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:38:52,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:52,607 INFO L225 Difference]: With dead ends: 359 [2022-02-15 01:38:52,608 INFO L226 Difference]: Without dead ends: 337 [2022-02-15 01:38:52,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3909 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:38:52,609 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 64 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4611 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 4757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 4611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:52,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 218 Invalid, 4757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 4611 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:38:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-02-15 01:38:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 311. [2022-02-15 01:38:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 303 states have (on average 1.5016501650165017) internal successors, (455), 305 states have internal predecessors, (455), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 462 transitions. [2022-02-15 01:38:52,677 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 462 transitions. Word has length 59 [2022-02-15 01:38:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:52,677 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 462 transitions. [2022-02-15 01:38:52,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 462 transitions. [2022-02-15 01:38:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:38:52,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:52,678 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:52,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 01:38:52,678 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:52,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1761517468, now seen corresponding path program 78 times [2022-02-15 01:38:52,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:52,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948671933] [2022-02-15 01:38:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:52,705 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:52,776 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:52,776 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:52,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:52,777 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:52,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:52,777 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:52,777 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:52,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:53,689 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:53,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948671933] [2022-02-15 01:38:53,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1948671933] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:53,690 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:53,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-15 01:38:53,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334911926] [2022-02-15 01:38:53,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:53,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 01:38:53,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 01:38:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:38:53,691 INFO L87 Difference]: Start difference. First operand 311 states and 462 transitions. Second operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:55,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:55,745 INFO L93 Difference]: Finished difference Result 336 states and 489 transitions. [2022-02-15 01:38:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 01:38:55,745 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:38:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:55,746 INFO L225 Difference]: With dead ends: 336 [2022-02-15 01:38:55,746 INFO L226 Difference]: Without dead ends: 328 [2022-02-15 01:38:55,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4205 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=481, Invalid=11291, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 01:38:55,747 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3466 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:55,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 190 Invalid, 3581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3466 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:38:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-15 01:38:55,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 313. [2022-02-15 01:38:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.498360655737705) internal successors, (457), 307 states have internal predecessors, (457), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 464 transitions. [2022-02-15 01:38:55,816 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 464 transitions. Word has length 59 [2022-02-15 01:38:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:55,816 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 464 transitions. [2022-02-15 01:38:55,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 464 transitions. [2022-02-15 01:38:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:38:55,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:55,817 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:55,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 01:38:55,817 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash -838710554, now seen corresponding path program 79 times [2022-02-15 01:38:55,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:55,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089605811] [2022-02-15 01:38:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:55,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:55,911 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:55,911 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:55,911 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:55,911 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:55,911 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:55,912 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:55,912 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:55,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:55,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:56,440 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:56,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089605811] [2022-02-15 01:38:56,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089605811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:56,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:56,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:38:56,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123921876] [2022-02-15 01:38:56,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:56,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:38:56,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:56,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:38:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:38:56,442 INFO L87 Difference]: Start difference. First operand 313 states and 464 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:57,283 INFO L93 Difference]: Finished difference Result 321 states and 471 transitions. [2022-02-15 01:38:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:38:57,284 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:38:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:57,285 INFO L225 Difference]: With dead ends: 321 [2022-02-15 01:38:57,285 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 01:38:57,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=4391, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:38:57,286 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:57,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 116 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:38:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 01:38:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2022-02-15 01:38:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4950819672131148) internal successors, (456), 307 states have internal predecessors, (456), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 463 transitions. [2022-02-15 01:38:57,376 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 463 transitions. Word has length 62 [2022-02-15 01:38:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:57,376 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 463 transitions. [2022-02-15 01:38:57,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 463 transitions. [2022-02-15 01:38:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:38:57,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:57,377 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:57,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 01:38:57,377 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:57,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1488732254, now seen corresponding path program 80 times [2022-02-15 01:38:57,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:57,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297715662] [2022-02-15 01:38:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:57,407 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:57,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:57,475 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:57,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:57,475 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:57,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:57,475 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:57,476 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:57,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:57,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:58,014 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:58,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297715662] [2022-02-15 01:38:58,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [297715662] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:58,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:58,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:38:58,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374981139] [2022-02-15 01:38:58,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:58,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:38:58,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:38:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:38:58,015 INFO L87 Difference]: Start difference. First operand 313 states and 463 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:59,083 INFO L93 Difference]: Finished difference Result 323 states and 472 transitions. [2022-02-15 01:38:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:38:59,083 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:38:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:59,084 INFO L225 Difference]: With dead ends: 323 [2022-02-15 01:38:59,084 INFO L226 Difference]: Without dead ends: 316 [2022-02-15 01:38:59,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:38:59,085 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:59,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 128 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:38:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-15 01:38:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 313. [2022-02-15 01:38:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4918032786885247) internal successors, (455), 307 states have internal predecessors, (455), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:38:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 462 transitions. [2022-02-15 01:38:59,153 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 462 transitions. Word has length 62 [2022-02-15 01:38:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:59,153 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 462 transitions. [2022-02-15 01:38:59,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:59,153 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 462 transitions. [2022-02-15 01:38:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:38:59,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:59,154 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:59,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 01:38:59,154 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1567038362, now seen corresponding path program 81 times [2022-02-15 01:38:59,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:59,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615332215] [2022-02-15 01:38:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:59,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:59,249 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:38:59,249 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:59,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:59,250 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:59,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:59,250 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:38:59,250 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:38:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:59,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:59,897 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:59,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615332215] [2022-02-15 01:38:59,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615332215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:59,898 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:59,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:38:59,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246933244] [2022-02-15 01:38:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:59,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:38:59,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:38:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:38:59,899 INFO L87 Difference]: Start difference. First operand 313 states and 462 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:00,964 INFO L93 Difference]: Finished difference Result 325 states and 473 transitions. [2022-02-15 01:39:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:39:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:39:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:00,965 INFO L225 Difference]: With dead ends: 325 [2022-02-15 01:39:00,965 INFO L226 Difference]: Without dead ends: 318 [2022-02-15 01:39:00,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:39:00,967 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:00,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 125 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:39:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-15 01:39:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 313. [2022-02-15 01:39:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4885245901639343) internal successors, (454), 307 states have internal predecessors, (454), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 461 transitions. [2022-02-15 01:39:01,041 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 461 transitions. Word has length 62 [2022-02-15 01:39:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:01,041 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 461 transitions. [2022-02-15 01:39:01,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 461 transitions. [2022-02-15 01:39:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:39:01,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:01,041 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:01,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 01:39:01,042 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 340760098, now seen corresponding path program 82 times [2022-02-15 01:39:01,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:01,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632589705] [2022-02-15 01:39:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:01,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:01,130 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:01,131 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:01,131 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:01,131 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:01,131 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:01,131 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:01,131 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:01,866 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:01,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632589705] [2022-02-15 01:39:01,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1632589705] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:01,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:01,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:39:01,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709174103] [2022-02-15 01:39:01,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:01,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:39:01,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:39:01,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:39:01,868 INFO L87 Difference]: Start difference. First operand 313 states and 461 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:03,269 INFO L93 Difference]: Finished difference Result 327 states and 474 transitions. [2022-02-15 01:39:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:39:03,269 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:39:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:03,271 INFO L225 Difference]: With dead ends: 327 [2022-02-15 01:39:03,271 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 01:39:03,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:39:03,272 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:03,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 157 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:39:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 01:39:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 313. [2022-02-15 01:39:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4852459016393442) internal successors, (453), 307 states have internal predecessors, (453), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 460 transitions. [2022-02-15 01:39:03,357 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 460 transitions. Word has length 62 [2022-02-15 01:39:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:03,357 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 460 transitions. [2022-02-15 01:39:03,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 460 transitions. [2022-02-15 01:39:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:39:03,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:03,357 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:03,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 01:39:03,358 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:03,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:03,358 INFO L85 PathProgramCache]: Analyzing trace with hash -327115290, now seen corresponding path program 83 times [2022-02-15 01:39:03,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:03,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432911793] [2022-02-15 01:39:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:03,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:03,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:03,460 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:03,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:03,460 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:03,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:03,460 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:03,460 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:03,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:04,257 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:04,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432911793] [2022-02-15 01:39:04,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [432911793] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:04,257 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:04,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:39:04,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096815054] [2022-02-15 01:39:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:04,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:39:04,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:39:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:39:04,259 INFO L87 Difference]: Start difference. First operand 313 states and 460 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:05,821 INFO L93 Difference]: Finished difference Result 329 states and 475 transitions. [2022-02-15 01:39:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:39:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:39:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:05,822 INFO L225 Difference]: With dead ends: 329 [2022-02-15 01:39:05,822 INFO L226 Difference]: Without dead ends: 322 [2022-02-15 01:39:05,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=8147, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:39:05,824 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:05,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 159 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:39:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-15 01:39:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 313. [2022-02-15 01:39:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.481967213114754) internal successors, (452), 307 states have internal predecessors, (452), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 459 transitions. [2022-02-15 01:39:05,899 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 459 transitions. Word has length 62 [2022-02-15 01:39:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:05,899 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 459 transitions. [2022-02-15 01:39:05,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 459 transitions. [2022-02-15 01:39:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:39:05,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:05,900 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:05,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 01:39:05,900 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash -761377630, now seen corresponding path program 84 times [2022-02-15 01:39:05,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:05,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743904765] [2022-02-15 01:39:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:05,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:06,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:06,013 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:06,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:06,014 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:06,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:06,014 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:06,014 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:06,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:06,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:06,860 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:06,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743904765] [2022-02-15 01:39:06,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [743904765] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:06,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:06,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:39:06,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487852334] [2022-02-15 01:39:06,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:06,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:39:06,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:39:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:39:06,861 INFO L87 Difference]: Start difference. First operand 313 states and 459 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:08,770 INFO L93 Difference]: Finished difference Result 331 states and 476 transitions. [2022-02-15 01:39:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:39:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:39:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:08,771 INFO L225 Difference]: With dead ends: 331 [2022-02-15 01:39:08,771 INFO L226 Difference]: Without dead ends: 324 [2022-02-15 01:39:08,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3462 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:39:08,772 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3246 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 3339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:08,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 201 Invalid, 3339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3246 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:39:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-15 01:39:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 313. [2022-02-15 01:39:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.478688524590164) internal successors, (451), 307 states have internal predecessors, (451), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 458 transitions. [2022-02-15 01:39:08,842 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 458 transitions. Word has length 62 [2022-02-15 01:39:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:08,842 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 458 transitions. [2022-02-15 01:39:08,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 458 transitions. [2022-02-15 01:39:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:39:08,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:08,843 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:08,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 01:39:08,843 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash -955156634, now seen corresponding path program 85 times [2022-02-15 01:39:08,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:08,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149582780] [2022-02-15 01:39:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:08,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:08,979 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:08,980 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:08,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:08,980 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:08,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:08,980 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:08,980 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:08,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:09,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:10,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:10,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149582780] [2022-02-15 01:39:10,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1149582780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:10,035 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:10,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:39:10,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053080258] [2022-02-15 01:39:10,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:10,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:39:10,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:39:10,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:39:10,036 INFO L87 Difference]: Start difference. First operand 313 states and 458 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:12,033 INFO L93 Difference]: Finished difference Result 332 states and 476 transitions. [2022-02-15 01:39:12,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:39:12,034 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:39:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:12,035 INFO L225 Difference]: With dead ends: 332 [2022-02-15 01:39:12,035 INFO L226 Difference]: Without dead ends: 325 [2022-02-15 01:39:12,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:39:12,036 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3244 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 3343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:12,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 188 Invalid, 3343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3244 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:39:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-15 01:39:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 313. [2022-02-15 01:39:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.4754098360655739) internal successors, (450), 307 states have internal predecessors, (450), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 457 transitions. [2022-02-15 01:39:12,112 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 457 transitions. Word has length 62 [2022-02-15 01:39:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:12,112 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 457 transitions. [2022-02-15 01:39:12,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 457 transitions. [2022-02-15 01:39:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:39:12,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:12,112 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:12,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 01:39:12,112 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:12,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1171776290, now seen corresponding path program 86 times [2022-02-15 01:39:12,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:12,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408862650] [2022-02-15 01:39:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:12,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:12,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:12,209 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:12,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:12,209 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:12,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:12,210 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:12,210 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:12,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:12,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:13,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:13,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408862650] [2022-02-15 01:39:13,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408862650] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:13,192 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:13,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:39:13,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677615174] [2022-02-15 01:39:13,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:13,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:39:13,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:39:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:39:13,193 INFO L87 Difference]: Start difference. First operand 313 states and 457 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:15,779 INFO L93 Difference]: Finished difference Result 412 states and 603 transitions. [2022-02-15 01:39:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:39:15,780 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:39:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:15,781 INFO L225 Difference]: With dead ends: 412 [2022-02-15 01:39:15,782 INFO L226 Difference]: Without dead ends: 389 [2022-02-15 01:39:15,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=11720, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:39:15,783 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 65 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4633 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:15,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 210 Invalid, 4787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4633 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:39:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-15 01:39:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 361. [2022-02-15 01:39:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 353 states have (on average 1.498583569405099) internal successors, (529), 355 states have internal predecessors, (529), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 536 transitions. [2022-02-15 01:39:15,878 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 536 transitions. Word has length 62 [2022-02-15 01:39:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:15,878 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 536 transitions. [2022-02-15 01:39:15,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 536 transitions. [2022-02-15 01:39:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:39:15,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:15,879 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:15,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 01:39:15,879 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1348183644, now seen corresponding path program 87 times [2022-02-15 01:39:15,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:15,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498322621] [2022-02-15 01:39:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:15,908 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:15,983 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:15,983 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:15,984 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:15,984 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:15,984 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:15,984 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:15,984 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:16,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:17,060 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:17,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498322621] [2022-02-15 01:39:17,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498322621] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:17,061 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:17,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-15 01:39:17,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474370682] [2022-02-15 01:39:17,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:17,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 01:39:17,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 01:39:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=3250, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:39:17,062 INFO L87 Difference]: Start difference. First operand 361 states and 536 transitions. Second operand has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:19,313 INFO L93 Difference]: Finished difference Result 387 states and 564 transitions. [2022-02-15 01:39:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 01:39:19,313 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:39:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:19,314 INFO L225 Difference]: With dead ends: 387 [2022-02-15 01:39:19,314 INFO L226 Difference]: Without dead ends: 379 [2022-02-15 01:39:19,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=510, Invalid=12600, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 01:39:19,315 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3665 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 3665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:19,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 191 Invalid, 3785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 3665 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:39:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-02-15 01:39:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 363. [2022-02-15 01:39:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 355 states have (on average 1.495774647887324) internal successors, (531), 357 states have internal predecessors, (531), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 538 transitions. [2022-02-15 01:39:19,397 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 538 transitions. Word has length 62 [2022-02-15 01:39:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:19,397 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 538 transitions. [2022-02-15 01:39:19,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 538 transitions. [2022-02-15 01:39:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:19,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:19,398 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:19,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 01:39:19,398 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash -711036390, now seen corresponding path program 88 times [2022-02-15 01:39:19,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:19,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409659800] [2022-02-15 01:39:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:19,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:19,474 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:19,475 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:19,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:19,475 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:19,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:19,475 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:19,475 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:19,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:20,034 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:20,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409659800] [2022-02-15 01:39:20,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [409659800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:20,035 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:20,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:39:20,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104103410] [2022-02-15 01:39:20,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:20,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:39:20,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:20,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:39:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:39:20,035 INFO L87 Difference]: Start difference. First operand 363 states and 538 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:20,947 INFO L93 Difference]: Finished difference Result 370 states and 544 transitions. [2022-02-15 01:39:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:39:20,948 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:20,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:20,949 INFO L225 Difference]: With dead ends: 370 [2022-02-15 01:39:20,949 INFO L226 Difference]: Without dead ends: 363 [2022-02-15 01:39:20,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:39:20,950 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:20,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 130 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:39:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-02-15 01:39:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 337. [2022-02-15 01:39:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.5075987841945289) internal successors, (496), 331 states have internal predecessors, (496), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 503 transitions. [2022-02-15 01:39:21,077 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 503 transitions. Word has length 65 [2022-02-15 01:39:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:21,078 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 503 transitions. [2022-02-15 01:39:21,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 503 transitions. [2022-02-15 01:39:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:21,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:21,078 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:21,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 01:39:21,079 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 500036574, now seen corresponding path program 89 times [2022-02-15 01:39:21,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:21,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535253137] [2022-02-15 01:39:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:21,108 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:21,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:21,162 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:21,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:21,163 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:21,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:21,163 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:21,163 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:21,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:21,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:21,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:21,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535253137] [2022-02-15 01:39:21,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [535253137] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:21,829 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:21,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:39:21,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981485176] [2022-02-15 01:39:21,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:21,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:39:21,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:39:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:39:21,830 INFO L87 Difference]: Start difference. First operand 337 states and 503 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:22,901 INFO L93 Difference]: Finished difference Result 346 states and 511 transitions. [2022-02-15 01:39:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:39:22,902 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:22,903 INFO L225 Difference]: With dead ends: 346 [2022-02-15 01:39:22,903 INFO L226 Difference]: Without dead ends: 339 [2022-02-15 01:39:22,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:39:22,904 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:22,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 142 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:39:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-15 01:39:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2022-02-15 01:39:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.5045592705167172) internal successors, (495), 331 states have internal predecessors, (495), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 502 transitions. [2022-02-15 01:39:23,004 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 502 transitions. Word has length 65 [2022-02-15 01:39:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:23,004 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 502 transitions. [2022-02-15 01:39:23,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 502 transitions. [2022-02-15 01:39:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:23,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:23,005 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:23,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 01:39:23,005 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:23,005 INFO L85 PathProgramCache]: Analyzing trace with hash -149985126, now seen corresponding path program 90 times [2022-02-15 01:39:23,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:23,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692845529] [2022-02-15 01:39:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:23,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:23,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:23,087 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:23,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:23,087 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:23,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:23,087 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:23,087 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:23,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:23,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:23,738 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:23,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692845529] [2022-02-15 01:39:23,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [692845529] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:23,738 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:23,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:39:23,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855001444] [2022-02-15 01:39:23,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:23,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:39:23,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:23,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:39:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:39:23,739 INFO L87 Difference]: Start difference. First operand 337 states and 502 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:24,981 INFO L93 Difference]: Finished difference Result 348 states and 512 transitions. [2022-02-15 01:39:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:39:24,981 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:24,983 INFO L225 Difference]: With dead ends: 348 [2022-02-15 01:39:24,983 INFO L226 Difference]: Without dead ends: 341 [2022-02-15 01:39:24,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:39:24,984 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:24,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 149 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:39:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-02-15 01:39:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 337. [2022-02-15 01:39:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.5015197568389058) internal successors, (494), 331 states have internal predecessors, (494), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 501 transitions. [2022-02-15 01:39:25,088 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 501 transitions. Word has length 65 [2022-02-15 01:39:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:25,089 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 501 transitions. [2022-02-15 01:39:25,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 501 transitions. [2022-02-15 01:39:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:25,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:25,089 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:25,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 01:39:25,089 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash -228291234, now seen corresponding path program 91 times [2022-02-15 01:39:25,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:25,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744521741] [2022-02-15 01:39:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:25,119 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:25,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:25,174 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:25,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:25,174 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:25,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:25,174 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:25,174 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:25,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:25,914 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:25,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744521741] [2022-02-15 01:39:25,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [744521741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:25,914 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:25,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:39:25,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606434830] [2022-02-15 01:39:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:25,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:39:25,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:25,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:39:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:39:25,916 INFO L87 Difference]: Start difference. First operand 337 states and 501 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:27,303 INFO L93 Difference]: Finished difference Result 350 states and 513 transitions. [2022-02-15 01:39:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:39:27,304 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:27,305 INFO L225 Difference]: With dead ends: 350 [2022-02-15 01:39:27,305 INFO L226 Difference]: Without dead ends: 343 [2022-02-15 01:39:27,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2671 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:39:27,306 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:27,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 151 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:39:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-15 01:39:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 337. [2022-02-15 01:39:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.4984802431610942) internal successors, (493), 331 states have internal predecessors, (493), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 500 transitions. [2022-02-15 01:39:27,398 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 500 transitions. Word has length 65 [2022-02-15 01:39:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:27,398 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 500 transitions. [2022-02-15 01:39:27,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 500 transitions. [2022-02-15 01:39:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:27,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:27,399 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:27,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 01:39:27,399 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:27,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1679507226, now seen corresponding path program 92 times [2022-02-15 01:39:27,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:27,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699811888] [2022-02-15 01:39:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:27,451 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:27,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:27,510 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:27,510 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:27,510 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:27,510 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:27,510 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:27,510 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:27,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:27,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:28,288 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:28,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699811888] [2022-02-15 01:39:28,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [699811888] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:28,288 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:28,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:39:28,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055026183] [2022-02-15 01:39:28,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:28,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:39:28,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:28,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:39:28,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:39:28,289 INFO L87 Difference]: Start difference. First operand 337 states and 500 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:29,865 INFO L93 Difference]: Finished difference Result 352 states and 514 transitions. [2022-02-15 01:39:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:39:29,867 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:29,868 INFO L225 Difference]: With dead ends: 352 [2022-02-15 01:39:29,868 INFO L226 Difference]: Without dead ends: 345 [2022-02-15 01:39:29,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:39:29,869 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:29,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 163 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:39:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-15 01:39:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 337. [2022-02-15 01:39:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.4954407294832828) internal successors, (492), 331 states have internal predecessors, (492), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 499 transitions. [2022-02-15 01:39:29,950 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 499 transitions. Word has length 65 [2022-02-15 01:39:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:29,950 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 499 transitions. [2022-02-15 01:39:29,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 499 transitions. [2022-02-15 01:39:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:29,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:29,950 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:29,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 01:39:29,951 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1011631838, now seen corresponding path program 93 times [2022-02-15 01:39:29,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:29,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012568471] [2022-02-15 01:39:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:29,978 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:30,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:30,052 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:30,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:30,052 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:30,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:30,052 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:30,052 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:30,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:30,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:30,941 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:30,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012568471] [2022-02-15 01:39:30,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012568471] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:30,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:30,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:39:30,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670330452] [2022-02-15 01:39:30,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:30,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:39:30,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:39:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:39:30,943 INFO L87 Difference]: Start difference. First operand 337 states and 499 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:32,773 INFO L93 Difference]: Finished difference Result 354 states and 515 transitions. [2022-02-15 01:39:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:39:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:32,775 INFO L225 Difference]: With dead ends: 354 [2022-02-15 01:39:32,775 INFO L226 Difference]: Without dead ends: 347 [2022-02-15 01:39:32,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:39:32,776 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2655 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:32,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 170 Invalid, 2747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2655 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:39:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-15 01:39:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 337. [2022-02-15 01:39:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.4924012158054711) internal successors, (491), 331 states have internal predecessors, (491), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 498 transitions. [2022-02-15 01:39:32,864 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 498 transitions. Word has length 65 [2022-02-15 01:39:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:32,865 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 498 transitions. [2022-02-15 01:39:32,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:32,865 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 498 transitions. [2022-02-15 01:39:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:32,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:32,865 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:32,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 01:39:32,865 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:32,866 INFO L85 PathProgramCache]: Analyzing trace with hash 577369498, now seen corresponding path program 94 times [2022-02-15 01:39:32,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:32,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628589250] [2022-02-15 01:39:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:32,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:32,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:32,974 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:32,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:32,974 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:32,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:32,974 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:32,974 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:32,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:33,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:33,919 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:33,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628589250] [2022-02-15 01:39:33,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [628589250] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:33,920 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:33,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:39:33,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600230951] [2022-02-15 01:39:33,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:33,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:39:33,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:33,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:39:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:39:33,921 INFO L87 Difference]: Start difference. First operand 337 states and 498 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:35,815 INFO L93 Difference]: Finished difference Result 356 states and 516 transitions. [2022-02-15 01:39:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:39:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:35,816 INFO L225 Difference]: With dead ends: 356 [2022-02-15 01:39:35,816 INFO L226 Difference]: Without dead ends: 349 [2022-02-15 01:39:35,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:39:35,817 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:35,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 167 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:39:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-15 01:39:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 337. [2022-02-15 01:39:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.4893617021276595) internal successors, (490), 331 states have internal predecessors, (490), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 497 transitions. [2022-02-15 01:39:35,902 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 497 transitions. Word has length 65 [2022-02-15 01:39:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:35,902 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 497 transitions. [2022-02-15 01:39:35,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 497 transitions. [2022-02-15 01:39:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:35,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:35,903 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:35,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 01:39:35,903 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:35,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash 383590494, now seen corresponding path program 95 times [2022-02-15 01:39:35,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:35,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058875237] [2022-02-15 01:39:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:35,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:35,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:35,998 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:35,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:35,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:35,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:35,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:35,998 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:35,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:36,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:37,004 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:37,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058875237] [2022-02-15 01:39:37,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058875237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:37,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:37,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:39:37,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033549298] [2022-02-15 01:39:37,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:37,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:39:37,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:39:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:39:37,006 INFO L87 Difference]: Start difference. First operand 337 states and 497 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:39,223 INFO L93 Difference]: Finished difference Result 357 states and 516 transitions. [2022-02-15 01:39:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:39:39,223 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:39,225 INFO L225 Difference]: With dead ends: 357 [2022-02-15 01:39:39,225 INFO L226 Difference]: Without dead ends: 350 [2022-02-15 01:39:39,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4402 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:39:39,226 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3546 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:39,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 194 Invalid, 3650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3546 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:39:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-15 01:39:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 337. [2022-02-15 01:39:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.486322188449848) internal successors, (489), 331 states have internal predecessors, (489), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 496 transitions. [2022-02-15 01:39:39,314 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 496 transitions. Word has length 65 [2022-02-15 01:39:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:39,314 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 496 transitions. [2022-02-15 01:39:39,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 496 transitions. [2022-02-15 01:39:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:39,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:39,315 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-15 01:39:39,315 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:39,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1784443878, now seen corresponding path program 96 times [2022-02-15 01:39:39,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:39,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436155754] [2022-02-15 01:39:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:39,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:39,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:39,457 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:39,457 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:39,457 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:39,457 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:39,457 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:39,457 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:39,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:39,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:40,594 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:40,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436155754] [2022-02-15 01:39:40,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [436155754] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:40,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:40,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:39:40,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201710863] [2022-02-15 01:39:40,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:40,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:39:40,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:40,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:39:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:39:40,596 INFO L87 Difference]: Start difference. First operand 337 states and 496 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:43,428 INFO L93 Difference]: Finished difference Result 442 states and 651 transitions. [2022-02-15 01:39:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:39:43,429 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:43,430 INFO L225 Difference]: With dead ends: 442 [2022-02-15 01:39:43,430 INFO L226 Difference]: Without dead ends: 418 [2022-02-15 01:39:43,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4839 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=515, Invalid=13057, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:39:43,431 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 70 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5054 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 5217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 5054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:43,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 217 Invalid, 5217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 5054 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:39:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-02-15 01:39:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 388. [2022-02-15 01:39:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 380 states have (on average 1.5078947368421052) internal successors, (573), 382 states have internal predecessors, (573), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 580 transitions. [2022-02-15 01:39:43,546 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 580 transitions. Word has length 65 [2022-02-15 01:39:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:43,546 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 580 transitions. [2022-02-15 01:39:43,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 580 transitions. [2022-02-15 01:39:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:39:43,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:43,546 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:43,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-15 01:39:43,546 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash -9436516, now seen corresponding path program 97 times [2022-02-15 01:39:43,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:43,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073914409] [2022-02-15 01:39:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:43,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:43,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:43,679 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:43,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:43,680 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:43,680 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:43,680 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:43,680 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:43,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:43,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:44,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:44,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073914409] [2022-02-15 01:39:44,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1073914409] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:44,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:44,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-15 01:39:44,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590396625] [2022-02-15 01:39:44,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:44,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-15 01:39:44,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:44,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-15 01:39:44,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:39:44,955 INFO L87 Difference]: Start difference. First operand 388 states and 580 transitions. Second operand has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:47,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:47,794 INFO L93 Difference]: Finished difference Result 415 states and 609 transitions. [2022-02-15 01:39:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 01:39:47,794 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:39:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:47,796 INFO L225 Difference]: With dead ends: 415 [2022-02-15 01:39:47,796 INFO L226 Difference]: Without dead ends: 407 [2022-02-15 01:39:47,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5180 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=535, Invalid=13985, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 01:39:47,797 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4790 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 4916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:47,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 232 Invalid, 4916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 4790 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:39:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-15 01:39:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 390. [2022-02-15 01:39:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.5052356020942408) internal successors, (575), 384 states have internal predecessors, (575), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 582 transitions. [2022-02-15 01:39:47,899 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 582 transitions. Word has length 65 [2022-02-15 01:39:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:47,899 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 582 transitions. [2022-02-15 01:39:47,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 582 transitions. [2022-02-15 01:39:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:39:47,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:47,900 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:47,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-15 01:39:47,900 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:47,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1161656798, now seen corresponding path program 98 times [2022-02-15 01:39:47,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:47,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124195061] [2022-02-15 01:39:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:47,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:48,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:48,006 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:48,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:48,006 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:48,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:48,006 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:48,006 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:48,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:48,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:48,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:48,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124195061] [2022-02-15 01:39:48,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1124195061] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:48,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:48,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:39:48,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196520892] [2022-02-15 01:39:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:48,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:39:48,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:39:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:39:48,719 INFO L87 Difference]: Start difference. First operand 390 states and 582 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:49,779 INFO L93 Difference]: Finished difference Result 398 states and 589 transitions. [2022-02-15 01:39:49,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:39:49,780 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:39:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:49,781 INFO L225 Difference]: With dead ends: 398 [2022-02-15 01:39:49,781 INFO L226 Difference]: Without dead ends: 391 [2022-02-15 01:39:49,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:39:49,782 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:49,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 131 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:39:49,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-02-15 01:39:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2022-02-15 01:39:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.5026178010471205) internal successors, (574), 384 states have internal predecessors, (574), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 581 transitions. [2022-02-15 01:39:49,880 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 581 transitions. Word has length 68 [2022-02-15 01:39:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:49,880 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 581 transitions. [2022-02-15 01:39:49,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 581 transitions. [2022-02-15 01:39:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:39:49,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:49,880 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:49,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-15 01:39:49,881 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash 49416166, now seen corresponding path program 99 times [2022-02-15 01:39:49,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:49,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928044111] [2022-02-15 01:39:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:49,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:49,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:49,972 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:49,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:49,973 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:49,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:49,973 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:49,973 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:49,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:50,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:50,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:50,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928044111] [2022-02-15 01:39:50,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [928044111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:50,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:50,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:39:50,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447572570] [2022-02-15 01:39:50,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:50,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:39:50,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:39:50,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:39:50,701 INFO L87 Difference]: Start difference. First operand 390 states and 581 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:51,913 INFO L93 Difference]: Finished difference Result 400 states and 590 transitions. [2022-02-15 01:39:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:39:51,913 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:39:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:51,914 INFO L225 Difference]: With dead ends: 400 [2022-02-15 01:39:51,914 INFO L226 Difference]: Without dead ends: 393 [2022-02-15 01:39:51,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:39:51,915 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:51,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 138 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:39:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-02-15 01:39:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2022-02-15 01:39:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.5) internal successors, (573), 384 states have internal predecessors, (573), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 580 transitions. [2022-02-15 01:39:52,016 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 580 transitions. Word has length 68 [2022-02-15 01:39:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:52,016 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 580 transitions. [2022-02-15 01:39:52,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 580 transitions. [2022-02-15 01:39:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:39:52,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:52,017 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:52,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-15 01:39:52,017 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash -600605534, now seen corresponding path program 100 times [2022-02-15 01:39:52,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:52,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091084215] [2022-02-15 01:39:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:52,062 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:52,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:52,116 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:52,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:52,116 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:52,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:52,116 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:52,116 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:52,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:52,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:52,868 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:52,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091084215] [2022-02-15 01:39:52,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091084215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:52,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:52,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:39:52,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168424393] [2022-02-15 01:39:52,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:52,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:39:52,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:39:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:39:52,869 INFO L87 Difference]: Start difference. First operand 390 states and 580 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:54,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:54,227 INFO L93 Difference]: Finished difference Result 402 states and 591 transitions. [2022-02-15 01:39:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:39:54,227 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:39:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:54,229 INFO L225 Difference]: With dead ends: 402 [2022-02-15 01:39:54,229 INFO L226 Difference]: Without dead ends: 395 [2022-02-15 01:39:54,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:39:54,229 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:54,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 140 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:39:54,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-15 01:39:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 390. [2022-02-15 01:39:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4973821989528795) internal successors, (572), 384 states have internal predecessors, (572), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 579 transitions. [2022-02-15 01:39:54,336 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 579 transitions. Word has length 68 [2022-02-15 01:39:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:54,336 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 579 transitions. [2022-02-15 01:39:54,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 579 transitions. [2022-02-15 01:39:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:39:54,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:54,336 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:54,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-15 01:39:54,337 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash -678911642, now seen corresponding path program 101 times [2022-02-15 01:39:54,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:54,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375622246] [2022-02-15 01:39:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:54,389 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:54,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:54,464 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:54,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:54,465 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:54,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:54,465 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:54,465 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:54,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:55,297 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:55,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375622246] [2022-02-15 01:39:55,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375622246] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:55,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:55,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:39:55,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92139027] [2022-02-15 01:39:55,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:55,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:39:55,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:39:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:39:55,299 INFO L87 Difference]: Start difference. First operand 390 states and 579 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:56,913 INFO L93 Difference]: Finished difference Result 404 states and 592 transitions. [2022-02-15 01:39:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:39:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:39:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:56,915 INFO L225 Difference]: With dead ends: 404 [2022-02-15 01:39:56,915 INFO L226 Difference]: Without dead ends: 397 [2022-02-15 01:39:56,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:39:56,916 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:56,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 167 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2356 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:39:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-02-15 01:39:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 390. [2022-02-15 01:39:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4947643979057592) internal successors, (571), 384 states have internal predecessors, (571), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 578 transitions. [2022-02-15 01:39:57,054 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 578 transitions. Word has length 68 [2022-02-15 01:39:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:57,054 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 578 transitions. [2022-02-15 01:39:57,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 578 transitions. [2022-02-15 01:39:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:39:57,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:57,054 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:57,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-15 01:39:57,055 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:57,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1228886818, now seen corresponding path program 102 times [2022-02-15 01:39:57,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:57,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203790457] [2022-02-15 01:39:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:57,085 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:57,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:39:57,160 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:57,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:57,160 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:57,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:57,161 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:57,161 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:39:57,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:57,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:58,014 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:58,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203790457] [2022-02-15 01:39:58,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203790457] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:58,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:58,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:39:58,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298826451] [2022-02-15 01:39:58,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:58,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:39:58,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:39:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:39:58,016 INFO L87 Difference]: Start difference. First operand 390 states and 578 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:59,870 INFO L93 Difference]: Finished difference Result 406 states and 593 transitions. [2022-02-15 01:39:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:39:59,871 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:39:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:59,872 INFO L225 Difference]: With dead ends: 406 [2022-02-15 01:39:59,872 INFO L226 Difference]: Without dead ends: 399 [2022-02-15 01:39:59,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:39:59,873 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:59,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 184 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:39:59,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-15 01:40:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 390. [2022-02-15 01:40:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4921465968586387) internal successors, (570), 384 states have internal predecessors, (570), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 577 transitions. [2022-02-15 01:40:00,026 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 577 transitions. Word has length 68 [2022-02-15 01:40:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:00,026 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 577 transitions. [2022-02-15 01:40:00,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 577 transitions. [2022-02-15 01:40:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:40:00,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:00,027 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:00,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-15 01:40:00,027 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:00,027 INFO L85 PathProgramCache]: Analyzing trace with hash 561011430, now seen corresponding path program 103 times [2022-02-15 01:40:00,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:00,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753091198] [2022-02-15 01:40:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:00,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:00,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:00,128 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:00,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:00,129 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:00,129 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:00,129 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:00,129 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:00,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:00,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:01,130 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:01,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753091198] [2022-02-15 01:40:01,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [753091198] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:01,131 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:01,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:40:01,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526563537] [2022-02-15 01:40:01,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:01,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:40:01,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:40:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:40:01,132 INFO L87 Difference]: Start difference. First operand 390 states and 577 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:03,235 INFO L93 Difference]: Finished difference Result 408 states and 594 transitions. [2022-02-15 01:40:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:40:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:40:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:03,236 INFO L225 Difference]: With dead ends: 408 [2022-02-15 01:40:03,236 INFO L226 Difference]: Without dead ends: 401 [2022-02-15 01:40:03,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:40:03,237 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3117 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:03,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 186 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3117 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:40:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-15 01:40:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 390. [2022-02-15 01:40:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4895287958115184) internal successors, (569), 384 states have internal predecessors, (569), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 576 transitions. [2022-02-15 01:40:03,350 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 576 transitions. Word has length 68 [2022-02-15 01:40:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:03,350 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 576 transitions. [2022-02-15 01:40:03,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 576 transitions. [2022-02-15 01:40:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:40:03,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:03,351 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:03,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-15 01:40:03,351 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 126749090, now seen corresponding path program 104 times [2022-02-15 01:40:03,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:03,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588113472] [2022-02-15 01:40:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:03,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:03,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:03,445 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:03,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:03,445 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:03,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:03,445 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:03,446 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:03,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:03,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:04,536 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:04,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588113472] [2022-02-15 01:40:04,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588113472] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:04,537 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:04,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:40:04,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056661533] [2022-02-15 01:40:04,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:04,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:40:04,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:40:04,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:40:04,538 INFO L87 Difference]: Start difference. First operand 390 states and 576 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:06,921 INFO L93 Difference]: Finished difference Result 410 states and 595 transitions. [2022-02-15 01:40:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:40:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:40:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:06,923 INFO L225 Difference]: With dead ends: 410 [2022-02-15 01:40:06,923 INFO L226 Difference]: Without dead ends: 403 [2022-02-15 01:40:06,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4402 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:40:06,924 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3378 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 3482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:06,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 188 Invalid, 3482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3378 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:40:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-15 01:40:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 390. [2022-02-15 01:40:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.486910994764398) internal successors, (568), 384 states have internal predecessors, (568), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 575 transitions. [2022-02-15 01:40:07,045 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 575 transitions. Word has length 68 [2022-02-15 01:40:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:07,046 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 575 transitions. [2022-02-15 01:40:07,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 575 transitions. [2022-02-15 01:40:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:40:07,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:07,046 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:07,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-15 01:40:07,047 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:07,047 INFO L85 PathProgramCache]: Analyzing trace with hash -67029914, now seen corresponding path program 105 times [2022-02-15 01:40:07,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:07,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481969914] [2022-02-15 01:40:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:07,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:07,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:07,159 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:07,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:07,159 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:07,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:07,160 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:07,160 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:07,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:07,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:08,284 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:08,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481969914] [2022-02-15 01:40:08,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481969914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:08,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:08,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:40:08,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230464586] [2022-02-15 01:40:08,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:08,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:40:08,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:40:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:40:08,286 INFO L87 Difference]: Start difference. First operand 390 states and 575 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:10,728 INFO L93 Difference]: Finished difference Result 411 states and 595 transitions. [2022-02-15 01:40:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:40:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:40:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:10,729 INFO L225 Difference]: With dead ends: 411 [2022-02-15 01:40:10,729 INFO L226 Difference]: Without dead ends: 404 [2022-02-15 01:40:10,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4946 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:40:10,730 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4198 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 4309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 4198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:10,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 215 Invalid, 4309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 4198 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:40:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-15 01:40:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 390. [2022-02-15 01:40:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.4842931937172774) internal successors, (567), 384 states have internal predecessors, (567), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 574 transitions. [2022-02-15 01:40:10,823 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 574 transitions. Word has length 68 [2022-02-15 01:40:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:10,824 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 574 transitions. [2022-02-15 01:40:10,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 574 transitions. [2022-02-15 01:40:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:40:10,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:10,824 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:10,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-15 01:40:10,824 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:10,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2059903010, now seen corresponding path program 106 times [2022-02-15 01:40:10,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:10,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485223058] [2022-02-15 01:40:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:10,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:10,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:10,916 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:10,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:10,916 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:10,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:10,916 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:10,916 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:10,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:10,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:12,092 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:12,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485223058] [2022-02-15 01:40:12,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485223058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:12,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:12,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:40:12,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267210624] [2022-02-15 01:40:12,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:12,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:40:12,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:40:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:40:12,094 INFO L87 Difference]: Start difference. First operand 390 states and 574 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:15,150 INFO L93 Difference]: Finished difference Result 501 states and 738 transitions. [2022-02-15 01:40:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:40:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:40:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:15,151 INFO L225 Difference]: With dead ends: 501 [2022-02-15 01:40:15,151 INFO L226 Difference]: Without dead ends: 476 [2022-02-15 01:40:15,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5496 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=544, Invalid=14462, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:40:15,152 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6089 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 6262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:15,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 244 Invalid, 6262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6089 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:40:15,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-02-15 01:40:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 444. [2022-02-15 01:40:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 436 states have (on average 1.5045871559633028) internal successors, (656), 438 states have internal predecessors, (656), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 663 transitions. [2022-02-15 01:40:15,279 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 663 transitions. Word has length 68 [2022-02-15 01:40:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:15,279 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 663 transitions. [2022-02-15 01:40:15,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 663 transitions. [2022-02-15 01:40:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:40:15,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:15,279 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:15,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-15 01:40:15,280 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash -460056924, now seen corresponding path program 107 times [2022-02-15 01:40:15,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:15,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421195272] [2022-02-15 01:40:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:15,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:15,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:15,388 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:15,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:15,388 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:15,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:15,388 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:15,389 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:15,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:15,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:16,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:16,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421195272] [2022-02-15 01:40:16,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [421195272] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:16,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:16,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-15 01:40:16,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720487510] [2022-02-15 01:40:16,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:16,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-15 01:40:16,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-15 01:40:16,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3970, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:40:16,602 INFO L87 Difference]: Start difference. First operand 444 states and 663 transitions. Second operand has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:19,534 INFO L93 Difference]: Finished difference Result 472 states and 693 transitions. [2022-02-15 01:40:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 01:40:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:40:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:19,536 INFO L225 Difference]: With dead ends: 472 [2022-02-15 01:40:19,536 INFO L226 Difference]: Without dead ends: 464 [2022-02-15 01:40:19,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5952 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=564, Invalid=15438, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 01:40:19,537 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4678 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 4813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 4678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:19,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 218 Invalid, 4813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 4678 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:40:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-02-15 01:40:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 446. [2022-02-15 01:40:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 438 states have (on average 1.5022831050228311) internal successors, (658), 440 states have internal predecessors, (658), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 665 transitions. [2022-02-15 01:40:19,655 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 665 transitions. Word has length 68 [2022-02-15 01:40:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:19,655 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 665 transitions. [2022-02-15 01:40:19,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 665 transitions. [2022-02-15 01:40:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:19,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:19,655 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:19,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-15 01:40:19,655 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash -875848354, now seen corresponding path program 108 times [2022-02-15 01:40:19,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:19,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874389586] [2022-02-15 01:40:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:19,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:19,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:19,759 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:19,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:19,759 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:19,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:19,759 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:19,759 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:20,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:20,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874389586] [2022-02-15 01:40:20,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [874389586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:20,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:20,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:40:20,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600850268] [2022-02-15 01:40:20,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:20,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:40:20,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:40:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:40:20,395 INFO L87 Difference]: Start difference. First operand 446 states and 665 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:21,491 INFO L93 Difference]: Finished difference Result 453 states and 671 transitions. [2022-02-15 01:40:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:40:21,492 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:21,493 INFO L225 Difference]: With dead ends: 453 [2022-02-15 01:40:21,493 INFO L226 Difference]: Without dead ends: 446 [2022-02-15 01:40:21,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=330, Invalid=5220, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:40:21,494 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:21,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 135 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:40:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-02-15 01:40:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 417. [2022-02-15 01:40:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5134474327628362) internal successors, (619), 411 states have internal predecessors, (619), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 626 transitions. [2022-02-15 01:40:21,670 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 626 transitions. Word has length 71 [2022-02-15 01:40:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:21,670 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 626 transitions. [2022-02-15 01:40:21,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 626 transitions. [2022-02-15 01:40:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:21,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:21,671 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:21,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-15 01:40:21,671 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:21,671 INFO L85 PathProgramCache]: Analyzing trace with hash 473535770, now seen corresponding path program 109 times [2022-02-15 01:40:21,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:21,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139195925] [2022-02-15 01:40:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:21,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:21,755 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:21,755 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:21,755 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:21,755 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:21,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:21,756 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:21,756 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:21,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:21,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:22,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:22,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139195925] [2022-02-15 01:40:22,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [139195925] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:22,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:22,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:40:22,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073167074] [2022-02-15 01:40:22,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:22,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:40:22,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:22,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:40:22,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:40:22,478 INFO L87 Difference]: Start difference. First operand 417 states and 626 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:23,667 INFO L93 Difference]: Finished difference Result 426 states and 634 transitions. [2022-02-15 01:40:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:40:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:23,674 INFO L225 Difference]: With dead ends: 426 [2022-02-15 01:40:23,674 INFO L226 Difference]: Without dead ends: 419 [2022-02-15 01:40:23,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:40:23,676 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:23,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 132 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:40:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-15 01:40:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2022-02-15 01:40:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.511002444987775) internal successors, (618), 411 states have internal predecessors, (618), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 625 transitions. [2022-02-15 01:40:23,845 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 625 transitions. Word has length 71 [2022-02-15 01:40:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:23,845 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 625 transitions. [2022-02-15 01:40:23,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 625 transitions. [2022-02-15 01:40:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:23,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:23,846 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:23,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-15 01:40:23,846 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:23,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:23,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1684608734, now seen corresponding path program 110 times [2022-02-15 01:40:23,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:23,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131103434] [2022-02-15 01:40:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:23,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:23,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:23,963 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:23,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:23,963 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:23,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:23,963 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:23,963 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:23,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:24,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:24,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:24,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131103434] [2022-02-15 01:40:24,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [131103434] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:24,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:24,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:40:24,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875514543] [2022-02-15 01:40:24,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:24,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:40:24,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:40:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:40:24,696 INFO L87 Difference]: Start difference. First operand 417 states and 625 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:26,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:26,098 INFO L93 Difference]: Finished difference Result 428 states and 635 transitions. [2022-02-15 01:40:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:40:26,098 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:26,099 INFO L225 Difference]: With dead ends: 428 [2022-02-15 01:40:26,100 INFO L226 Difference]: Without dead ends: 421 [2022-02-15 01:40:26,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:40:26,100 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:26,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 149 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:40:26,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-02-15 01:40:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 417. [2022-02-15 01:40:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5085574572127138) internal successors, (617), 411 states have internal predecessors, (617), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 624 transitions. [2022-02-15 01:40:26,237 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 624 transitions. Word has length 71 [2022-02-15 01:40:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:26,237 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 624 transitions. [2022-02-15 01:40:26,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 624 transitions. [2022-02-15 01:40:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:26,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:26,237 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:26,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-15 01:40:26,238 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:26,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1034587034, now seen corresponding path program 111 times [2022-02-15 01:40:26,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:26,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439635450] [2022-02-15 01:40:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:26,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:26,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:26,321 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:26,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:26,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:26,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:26,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:26,322 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:26,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:26,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:27,113 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:27,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439635450] [2022-02-15 01:40:27,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [439635450] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:27,113 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:27,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:40:27,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056809369] [2022-02-15 01:40:27,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:27,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:40:27,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:40:27,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:40:27,115 INFO L87 Difference]: Start difference. First operand 417 states and 624 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:28,679 INFO L93 Difference]: Finished difference Result 430 states and 636 transitions. [2022-02-15 01:40:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:40:28,691 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:28,692 INFO L225 Difference]: With dead ends: 430 [2022-02-15 01:40:28,693 INFO L226 Difference]: Without dead ends: 423 [2022-02-15 01:40:28,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3065 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:40:28,693 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:28,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 161 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:40:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-15 01:40:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 417. [2022-02-15 01:40:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5061124694376529) internal successors, (616), 411 states have internal predecessors, (616), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 623 transitions. [2022-02-15 01:40:28,850 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 623 transitions. Word has length 71 [2022-02-15 01:40:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:28,850 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 623 transitions. [2022-02-15 01:40:28,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 623 transitions. [2022-02-15 01:40:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:28,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:28,851 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:28,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-15 01:40:28,851 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash 956280926, now seen corresponding path program 112 times [2022-02-15 01:40:28,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:28,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650925146] [2022-02-15 01:40:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:28,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:28,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:28,966 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:28,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:28,967 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:28,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:28,967 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:28,967 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:28,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:29,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:29,927 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:29,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650925146] [2022-02-15 01:40:29,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [650925146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:29,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:29,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:40:29,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562335282] [2022-02-15 01:40:29,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:29,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:40:29,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:29,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:40:29,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:40:29,929 INFO L87 Difference]: Start difference. First operand 417 states and 623 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:31,813 INFO L93 Difference]: Finished difference Result 432 states and 637 transitions. [2022-02-15 01:40:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:40:31,813 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:31,814 INFO L225 Difference]: With dead ends: 432 [2022-02-15 01:40:31,814 INFO L226 Difference]: Without dead ends: 425 [2022-02-15 01:40:31,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:40:31,815 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:31,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 178 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2701 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:40:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-02-15 01:40:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 417. [2022-02-15 01:40:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5036674816625917) internal successors, (615), 411 states have internal predecessors, (615), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 622 transitions. [2022-02-15 01:40:31,949 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 622 transitions. Word has length 71 [2022-02-15 01:40:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:31,949 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 622 transitions. [2022-02-15 01:40:31,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 622 transitions. [2022-02-15 01:40:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:31,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:31,950 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:31,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-15 01:40:31,950 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:31,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1430887910, now seen corresponding path program 113 times [2022-02-15 01:40:31,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:31,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965293476] [2022-02-15 01:40:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:31,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:32,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:32,066 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:32,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:32,066 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:32,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:32,066 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:32,066 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:32,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:32,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:32,123 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 01:40:33,050 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:33,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965293476] [2022-02-15 01:40:33,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965293476] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:33,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:33,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:40:33,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817671258] [2022-02-15 01:40:33,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:33,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:40:33,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:40:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:40:33,051 INFO L87 Difference]: Start difference. First operand 417 states and 622 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:35,054 INFO L93 Difference]: Finished difference Result 434 states and 638 transitions. [2022-02-15 01:40:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:40:35,054 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:35,056 INFO L225 Difference]: With dead ends: 434 [2022-02-15 01:40:35,056 INFO L226 Difference]: Without dead ends: 427 [2022-02-15 01:40:35,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:40:35,057 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 61 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2959 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:35,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 180 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2959 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:40:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-02-15 01:40:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 417. [2022-02-15 01:40:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.5012224938875305) internal successors, (614), 411 states have internal predecessors, (614), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 621 transitions. [2022-02-15 01:40:35,222 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 621 transitions. Word has length 71 [2022-02-15 01:40:35,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:35,222 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 621 transitions. [2022-02-15 01:40:35,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:35,222 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 621 transitions. [2022-02-15 01:40:35,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:35,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:35,224 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:35,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-15 01:40:35,224 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2098763298, now seen corresponding path program 114 times [2022-02-15 01:40:35,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:35,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456424757] [2022-02-15 01:40:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:35,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:35,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:35,326 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:35,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:35,326 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:35,327 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:35,327 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:35,327 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:35,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:35,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:36,416 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:36,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456424757] [2022-02-15 01:40:36,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [456424757] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:36,417 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:36,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:40:36,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178195984] [2022-02-15 01:40:36,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:36,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:40:36,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:36,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:40:36,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:40:36,418 INFO L87 Difference]: Start difference. First operand 417 states and 621 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:38,742 INFO L93 Difference]: Finished difference Result 436 states and 639 transitions. [2022-02-15 01:40:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:40:38,743 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:38,744 INFO L225 Difference]: With dead ends: 436 [2022-02-15 01:40:38,744 INFO L226 Difference]: Without dead ends: 429 [2022-02-15 01:40:38,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4315 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=490, Invalid=11720, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:40:38,745 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3508 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:38,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 197 Invalid, 3612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3508 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:40:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-02-15 01:40:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 417. [2022-02-15 01:40:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.4987775061124695) internal successors, (613), 411 states have internal predecessors, (613), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 620 transitions. [2022-02-15 01:40:38,913 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 620 transitions. Word has length 71 [2022-02-15 01:40:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:38,913 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 620 transitions. [2022-02-15 01:40:38,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 620 transitions. [2022-02-15 01:40:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:38,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:38,914 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:38,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-15 01:40:38,914 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:38,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1761941658, now seen corresponding path program 115 times [2022-02-15 01:40:38,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:38,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443428164] [2022-02-15 01:40:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:38,945 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:39,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:39,027 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:39,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:39,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:39,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:39,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:39,027 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:39,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:40,196 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:40,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443428164] [2022-02-15 01:40:40,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443428164] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:40,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:40,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:40:40,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447655768] [2022-02-15 01:40:40,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:40,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:40:40,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:40:40,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:40:40,197 INFO L87 Difference]: Start difference. First operand 417 states and 620 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:42,771 INFO L93 Difference]: Finished difference Result 438 states and 640 transitions. [2022-02-15 01:40:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:40:42,771 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:42,772 INFO L225 Difference]: With dead ends: 438 [2022-02-15 01:40:42,772 INFO L226 Difference]: Without dead ends: 431 [2022-02-15 01:40:42,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4954 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:40:42,773 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 64 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4000 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 4110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 4000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:42,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 209 Invalid, 4110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 4000 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:40:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-15 01:40:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 417. [2022-02-15 01:40:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.4963325183374083) internal successors, (612), 411 states have internal predecessors, (612), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 619 transitions. [2022-02-15 01:40:42,885 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 619 transitions. Word has length 71 [2022-02-15 01:40:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:42,885 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 619 transitions. [2022-02-15 01:40:42,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 619 transitions. [2022-02-15 01:40:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:42,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:42,885 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:42,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-15 01:40:42,885 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:42,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:42,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1568162654, now seen corresponding path program 116 times [2022-02-15 01:40:42,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:42,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683297036] [2022-02-15 01:40:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:42,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:42,978 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:42,978 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:42,978 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:42,978 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:42,979 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:42,979 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:42,979 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:42,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:43,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:44,207 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:44,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683297036] [2022-02-15 01:40:44,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683297036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:44,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:44,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:40:44,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504354368] [2022-02-15 01:40:44,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:44,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:40:44,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:44,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:40:44,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:40:44,209 INFO L87 Difference]: Start difference. First operand 417 states and 619 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:47,276 INFO L93 Difference]: Finished difference Result 439 states and 640 transitions. [2022-02-15 01:40:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:40:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:47,278 INFO L225 Difference]: With dead ends: 439 [2022-02-15 01:40:47,278 INFO L226 Difference]: Without dead ends: 432 [2022-02-15 01:40:47,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5505 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:40:47,279 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 5235 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 5235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:47,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 251 Invalid, 5352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 5235 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:40:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-02-15 01:40:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 417. [2022-02-15 01:40:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 409 states have (on average 1.4938875305623471) internal successors, (611), 411 states have internal predecessors, (611), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 618 transitions. [2022-02-15 01:40:47,429 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 618 transitions. Word has length 71 [2022-02-15 01:40:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:47,429 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 618 transitions. [2022-02-15 01:40:47,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 618 transitions. [2022-02-15 01:40:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:47,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:47,430 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:47,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-15 01:40:47,430 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:47,431 INFO L85 PathProgramCache]: Analyzing trace with hash -599871718, now seen corresponding path program 117 times [2022-02-15 01:40:47,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:47,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329699996] [2022-02-15 01:40:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:47,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:47,542 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:47,542 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:47,542 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:47,543 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:47,543 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:47,543 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:47,543 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:47,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:47,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:48,884 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:48,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329699996] [2022-02-15 01:40:48,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1329699996] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:48,885 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:48,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:40:48,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242942242] [2022-02-15 01:40:48,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:48,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:40:48,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:40:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:40:48,886 INFO L87 Difference]: Start difference. First operand 417 states and 618 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:52,628 INFO L93 Difference]: Finished difference Result 534 states and 791 transitions. [2022-02-15 01:40:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:40:52,628 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:52,629 INFO L225 Difference]: With dead ends: 534 [2022-02-15 01:40:52,629 INFO L226 Difference]: Without dead ends: 508 [2022-02-15 01:40:52,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5975 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=569, Invalid=15943, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:40:52,631 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 72 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6881 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 7063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 6881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:52,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 261 Invalid, 7063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 6881 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 01:40:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-02-15 01:40:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 474. [2022-02-15 01:40:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 466 states have (on average 1.5128755364806867) internal successors, (705), 468 states have internal predecessors, (705), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 712 transitions. [2022-02-15 01:40:52,808 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 712 transitions. Word has length 71 [2022-02-15 01:40:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:52,808 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 712 transitions. [2022-02-15 01:40:52,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 712 transitions. [2022-02-15 01:40:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:40:52,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:52,809 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:52,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-15 01:40:52,809 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:52,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:52,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1175135644, now seen corresponding path program 118 times [2022-02-15 01:40:52,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:52,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935009770] [2022-02-15 01:40:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:52,849 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:52,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:52,926 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:52,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:52,926 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:52,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:52,926 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:52,926 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:52,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:52,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:54,240 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:54,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935009770] [2022-02-15 01:40:54,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935009770] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:54,241 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:54,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-15 01:40:54,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924578408] [2022-02-15 01:40:54,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:54,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-15 01:40:54,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-15 01:40:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4357, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:40:54,242 INFO L87 Difference]: Start difference. First operand 474 states and 712 transitions. Second operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:57,434 INFO L93 Difference]: Finished difference Result 503 states and 743 transitions. [2022-02-15 01:40:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 01:40:57,434 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:40:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:57,435 INFO L225 Difference]: With dead ends: 503 [2022-02-15 01:40:57,435 INFO L226 Difference]: Without dead ends: 495 [2022-02-15 01:40:57,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=591, Invalid=16965, Unknown=0, NotChecked=0, Total=17556 [2022-02-15 01:40:57,436 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 88 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5166 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 5307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 5166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:57,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 229 Invalid, 5307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 5166 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:40:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-15 01:40:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 476. [2022-02-15 01:40:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5106837606837606) internal successors, (707), 470 states have internal predecessors, (707), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 714 transitions. [2022-02-15 01:40:57,600 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 714 transitions. Word has length 71 [2022-02-15 01:40:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:57,600 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 714 transitions. [2022-02-15 01:40:57,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 714 transitions. [2022-02-15 01:40:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:40:57,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:57,600 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:57,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-15 01:40:57,600 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash -373126298, now seen corresponding path program 119 times [2022-02-15 01:40:57,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:57,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046542859] [2022-02-15 01:40:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:57,642 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:57,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:57,696 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:57,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:57,696 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:57,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:57,696 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:57,696 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:57,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:57,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:58,388 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:58,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046542859] [2022-02-15 01:40:58,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046542859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:58,388 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:58,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:40:58,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172402017] [2022-02-15 01:40:58,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:58,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:40:58,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:58,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:40:58,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:40:58,389 INFO L87 Difference]: Start difference. First operand 476 states and 714 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:59,662 INFO L93 Difference]: Finished difference Result 484 states and 721 transitions. [2022-02-15 01:40:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:40:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:40:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:59,664 INFO L225 Difference]: With dead ends: 484 [2022-02-15 01:40:59,664 INFO L226 Difference]: Without dead ends: 477 [2022-02-15 01:40:59,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=6123, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:40:59,664 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:59,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 151 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:40:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-02-15 01:40:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 476. [2022-02-15 01:40:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5085470085470085) internal successors, (706), 470 states have internal predecessors, (706), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:40:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 713 transitions. [2022-02-15 01:40:59,799 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 713 transitions. Word has length 74 [2022-02-15 01:40:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:59,799 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 713 transitions. [2022-02-15 01:40:59,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 713 transitions. [2022-02-15 01:40:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:40:59,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:59,800 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:59,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-15 01:40:59,800 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:59,800 INFO L85 PathProgramCache]: Analyzing trace with hash 976257826, now seen corresponding path program 120 times [2022-02-15 01:40:59,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:59,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558808541] [2022-02-15 01:40:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:59,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:59,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:40:59,900 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:59,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:59,901 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:59,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:59,901 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:59,901 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:40:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:00,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:00,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558808541] [2022-02-15 01:41:00,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [558808541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:00,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:00,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:41:00,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709961510] [2022-02-15 01:41:00,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:00,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:41:00,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:00,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:41:00,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:41:00,645 INFO L87 Difference]: Start difference. First operand 476 states and 713 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:02,117 INFO L93 Difference]: Finished difference Result 486 states and 722 transitions. [2022-02-15 01:41:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:41:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:02,119 INFO L225 Difference]: With dead ends: 486 [2022-02-15 01:41:02,119 INFO L226 Difference]: Without dead ends: 479 [2022-02-15 01:41:02,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2564 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:41:02,119 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:02,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 153 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:41:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-15 01:41:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 476. [2022-02-15 01:41:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5064102564102564) internal successors, (705), 470 states have internal predecessors, (705), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 712 transitions. [2022-02-15 01:41:02,307 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 712 transitions. Word has length 74 [2022-02-15 01:41:02,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:02,307 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 712 transitions. [2022-02-15 01:41:02,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 712 transitions. [2022-02-15 01:41:02,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:41:02,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:02,308 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:02,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-15 01:41:02,308 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:02,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2107636506, now seen corresponding path program 121 times [2022-02-15 01:41:02,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:02,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054819919] [2022-02-15 01:41:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:02,346 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:02,404 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:02,404 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:02,405 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:02,405 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:02,405 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:02,405 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:02,405 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:02,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:02,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:03,250 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:03,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054819919] [2022-02-15 01:41:03,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2054819919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:03,250 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:03,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:41:03,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747558077] [2022-02-15 01:41:03,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:03,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:41:03,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:41:03,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:41:03,252 INFO L87 Difference]: Start difference. First operand 476 states and 712 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:04,761 INFO L93 Difference]: Finished difference Result 488 states and 723 transitions. [2022-02-15 01:41:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:41:04,761 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:04,763 INFO L225 Difference]: With dead ends: 488 [2022-02-15 01:41:04,763 INFO L226 Difference]: Without dead ends: 481 [2022-02-15 01:41:04,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:41:04,764 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:04,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 140 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1867 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:41:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-02-15 01:41:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 476. [2022-02-15 01:41:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5042735042735043) internal successors, (704), 470 states have internal predecessors, (704), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 711 transitions. [2022-02-15 01:41:04,949 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 711 transitions. Word has length 74 [2022-02-15 01:41:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:04,949 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 711 transitions. [2022-02-15 01:41:04,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 711 transitions. [2022-02-15 01:41:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:41:04,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:04,950 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:04,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-15 01:41:04,950 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:04,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1537309090, now seen corresponding path program 122 times [2022-02-15 01:41:04,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:04,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41491894] [2022-02-15 01:41:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:04,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:05,063 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:05,064 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:05,064 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:05,064 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:05,064 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:05,064 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:05,064 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:05,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:05,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:05,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:05,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41491894] [2022-02-15 01:41:05,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [41491894] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:05,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:05,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:41:05,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422306373] [2022-02-15 01:41:05,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:05,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:41:05,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:41:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:41:05,965 INFO L87 Difference]: Start difference. First operand 476 states and 711 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:07,837 INFO L93 Difference]: Finished difference Result 490 states and 724 transitions. [2022-02-15 01:41:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:41:07,838 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:07,839 INFO L225 Difference]: With dead ends: 490 [2022-02-15 01:41:07,839 INFO L226 Difference]: Without dead ends: 483 [2022-02-15 01:41:07,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3504 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:41:07,840 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2723 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:07,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 182 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2723 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:41:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-02-15 01:41:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 476. [2022-02-15 01:41:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5021367521367521) internal successors, (703), 470 states have internal predecessors, (703), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 710 transitions. [2022-02-15 01:41:08,027 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 710 transitions. Word has length 74 [2022-02-15 01:41:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:08,027 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 710 transitions. [2022-02-15 01:41:08,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 710 transitions. [2022-02-15 01:41:08,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:41:08,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:08,028 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:08,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-15 01:41:08,028 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:08,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:08,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1459002982, now seen corresponding path program 123 times [2022-02-15 01:41:08,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:08,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155627631] [2022-02-15 01:41:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:08,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:08,127 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:08,127 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:08,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:08,128 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:08,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:08,128 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:08,128 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:08,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:09,106 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:09,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155627631] [2022-02-15 01:41:09,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155627631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:09,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:09,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:41:09,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983749472] [2022-02-15 01:41:09,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:09,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:41:09,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:09,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:41:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:41:09,108 INFO L87 Difference]: Start difference. First operand 476 states and 710 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:11,306 INFO L93 Difference]: Finished difference Result 492 states and 725 transitions. [2022-02-15 01:41:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:41:11,307 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:11,308 INFO L225 Difference]: With dead ends: 492 [2022-02-15 01:41:11,308 INFO L226 Difference]: Without dead ends: 485 [2022-02-15 01:41:11,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:41:11,309 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:11,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 199 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3253 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:41:11,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-15 01:41:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 476. [2022-02-15 01:41:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.5) internal successors, (702), 470 states have internal predecessors, (702), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 709 transitions. [2022-02-15 01:41:11,484 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 709 transitions. Word has length 74 [2022-02-15 01:41:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:11,484 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 709 transitions. [2022-02-15 01:41:11,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 709 transitions. [2022-02-15 01:41:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:41:11,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:11,484 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:11,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-15 01:41:11,485 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:11,485 INFO L85 PathProgramCache]: Analyzing trace with hash -928165854, now seen corresponding path program 124 times [2022-02-15 01:41:11,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:11,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554454292] [2022-02-15 01:41:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:11,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:11,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:11,565 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:11,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:11,565 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:11,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:11,565 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:11,565 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:11,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:11,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:12,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:12,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554454292] [2022-02-15 01:41:12,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [554454292] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:12,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:12,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:41:12,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973452981] [2022-02-15 01:41:12,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:12,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:41:12,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:41:12,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:41:12,590 INFO L87 Difference]: Start difference. First operand 476 states and 709 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:14,742 INFO L93 Difference]: Finished difference Result 494 states and 726 transitions. [2022-02-15 01:41:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:41:14,742 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:14,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:14,743 INFO L225 Difference]: With dead ends: 494 [2022-02-15 01:41:14,743 INFO L226 Difference]: Without dead ends: 487 [2022-02-15 01:41:14,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4428 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:41:14,745 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:14,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 176 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:41:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-02-15 01:41:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 476. [2022-02-15 01:41:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.4978632478632479) internal successors, (701), 470 states have internal predecessors, (701), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 708 transitions. [2022-02-15 01:41:14,916 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 708 transitions. Word has length 74 [2022-02-15 01:41:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:14,916 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 708 transitions. [2022-02-15 01:41:14,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:14,916 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 708 transitions. [2022-02-15 01:41:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:41:14,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:14,916 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:14,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-15 01:41:14,917 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1596041242, now seen corresponding path program 125 times [2022-02-15 01:41:14,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:14,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310212522] [2022-02-15 01:41:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:14,945 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:14,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:14,998 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:14,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:14,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:14,999 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:14,999 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:14,999 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:14,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:15,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:16,181 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:16,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310212522] [2022-02-15 01:41:16,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [310212522] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:16,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:16,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:41:16,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626233574] [2022-02-15 01:41:16,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:16,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:41:16,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:41:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:41:16,183 INFO L87 Difference]: Start difference. First operand 476 states and 708 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:18,825 INFO L93 Difference]: Finished difference Result 496 states and 727 transitions. [2022-02-15 01:41:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:41:18,826 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:18,827 INFO L225 Difference]: With dead ends: 496 [2022-02-15 01:41:18,827 INFO L226 Difference]: Without dead ends: 489 [2022-02-15 01:41:18,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4952 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:41:18,828 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3827 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:18,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 203 Invalid, 3937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3827 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:41:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-02-15 01:41:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 476. [2022-02-15 01:41:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.4957264957264957) internal successors, (700), 470 states have internal predecessors, (700), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 707 transitions. [2022-02-15 01:41:18,982 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 707 transitions. Word has length 74 [2022-02-15 01:41:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:18,982 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 707 transitions. [2022-02-15 01:41:18,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 707 transitions. [2022-02-15 01:41:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:41:18,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:18,983 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:18,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-15 01:41:18,983 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:18,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2030303582, now seen corresponding path program 126 times [2022-02-15 01:41:18,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:18,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516032476] [2022-02-15 01:41:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:19,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:19,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:19,082 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:19,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:19,082 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:19,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:19,083 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:19,083 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:19,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:20,325 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:20,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516032476] [2022-02-15 01:41:20,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [516032476] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:20,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:20,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:41:20,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327922588] [2022-02-15 01:41:20,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:20,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:41:20,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:41:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:41:20,327 INFO L87 Difference]: Start difference. First operand 476 states and 707 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:23,044 INFO L93 Difference]: Finished difference Result 498 states and 728 transitions. [2022-02-15 01:41:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:41:23,044 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:23,045 INFO L225 Difference]: With dead ends: 498 [2022-02-15 01:41:23,045 INFO L226 Difference]: Without dead ends: 491 [2022-02-15 01:41:23,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:41:23,046 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4005 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:23,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 200 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4005 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:41:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-02-15 01:41:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 476. [2022-02-15 01:41:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.4935897435897436) internal successors, (699), 470 states have internal predecessors, (699), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 706 transitions. [2022-02-15 01:41:23,197 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 706 transitions. Word has length 74 [2022-02-15 01:41:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:23,198 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 706 transitions. [2022-02-15 01:41:23,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 706 transitions. [2022-02-15 01:41:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:41:23,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:23,198 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:23,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-15 01:41:23,198 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:23,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:23,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2070884710, now seen corresponding path program 127 times [2022-02-15 01:41:23,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:23,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945947658] [2022-02-15 01:41:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:23,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:23,297 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:23,297 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:23,297 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:23,297 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:23,297 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:23,297 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:23,297 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:23,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:23,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:24,581 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:24,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945947658] [2022-02-15 01:41:24,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945947658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:24,581 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:24,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:41:24,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044200112] [2022-02-15 01:41:24,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:24,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:41:24,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:24,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:41:24,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:41:24,583 INFO L87 Difference]: Start difference. First operand 476 states and 706 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:27,453 INFO L93 Difference]: Finished difference Result 499 states and 728 transitions. [2022-02-15 01:41:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:41:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:27,454 INFO L225 Difference]: With dead ends: 499 [2022-02-15 01:41:27,454 INFO L226 Difference]: Without dead ends: 492 [2022-02-15 01:41:27,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6079 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:41:27,455 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4407 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 4530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:27,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 207 Invalid, 4530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4407 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:41:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-02-15 01:41:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 476. [2022-02-15 01:41:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 468 states have (on average 1.4914529914529915) internal successors, (698), 470 states have internal predecessors, (698), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 705 transitions. [2022-02-15 01:41:27,596 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 705 transitions. Word has length 74 [2022-02-15 01:41:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:27,597 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 705 transitions. [2022-02-15 01:41:27,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 705 transitions. [2022-02-15 01:41:27,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:41:27,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:27,597 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:27,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-15 01:41:27,597 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash -97149662, now seen corresponding path program 128 times [2022-02-15 01:41:27,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:27,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966598589] [2022-02-15 01:41:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:27,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:27,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:27,746 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:27,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:27,746 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:27,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:27,747 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:27,747 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:27,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:27,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:29,152 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:29,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966598589] [2022-02-15 01:41:29,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [966598589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:29,152 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:29,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:41:29,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220104060] [2022-02-15 01:41:29,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:29,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:41:29,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:41:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:41:29,154 INFO L87 Difference]: Start difference. First operand 476 states and 705 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:33,067 INFO L93 Difference]: Finished difference Result 599 states and 887 transitions. [2022-02-15 01:41:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:41:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:33,070 INFO L225 Difference]: With dead ends: 599 [2022-02-15 01:41:33,070 INFO L226 Difference]: Without dead ends: 572 [2022-02-15 01:41:33,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6704 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=598, Invalid=17492, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:41:33,072 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 78 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6902 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 7092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 6902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:33,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 253 Invalid, 7092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 6902 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 01:41:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-02-15 01:41:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 536. [2022-02-15 01:41:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 528 states have (on average 1.509469696969697) internal successors, (797), 530 states have internal predecessors, (797), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 804 transitions. [2022-02-15 01:41:33,290 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 804 transitions. Word has length 74 [2022-02-15 01:41:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:33,290 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 804 transitions. [2022-02-15 01:41:33,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 804 transitions. [2022-02-15 01:41:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:41:33,291 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:33,291 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:33,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-15 01:41:33,291 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1677857700, now seen corresponding path program 129 times [2022-02-15 01:41:33,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:33,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051362260] [2022-02-15 01:41:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:33,332 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:33,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:33,411 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:33,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:33,411 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:33,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:33,411 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:33,411 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:33,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:33,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:34,847 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:34,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051362260] [2022-02-15 01:41:34,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051362260] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:34,848 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:34,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 01:41:34,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305939047] [2022-02-15 01:41:34,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:34,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 01:41:34,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 01:41:34,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:41:34,849 INFO L87 Difference]: Start difference. First operand 536 states and 804 transitions. Second operand has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:38,358 INFO L93 Difference]: Finished difference Result 566 states and 836 transitions. [2022-02-15 01:41:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 01:41:38,359 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:41:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:38,360 INFO L225 Difference]: With dead ends: 566 [2022-02-15 01:41:38,360 INFO L226 Difference]: Without dead ends: 558 [2022-02-15 01:41:38,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7090 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=616, Invalid=18566, Unknown=0, NotChecked=0, Total=19182 [2022-02-15 01:41:38,361 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 90 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5804 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 5952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 5804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:38,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 245 Invalid, 5952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 5804 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:41:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-02-15 01:41:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 538. [2022-02-15 01:41:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 530 states have (on average 1.5075471698113208) internal successors, (799), 532 states have internal predecessors, (799), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 806 transitions. [2022-02-15 01:41:38,538 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 806 transitions. Word has length 74 [2022-02-15 01:41:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:38,539 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 806 transitions. [2022-02-15 01:41:38,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 806 transitions. [2022-02-15 01:41:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:41:38,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:38,539 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:38,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-15 01:41:38,539 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1060135322, now seen corresponding path program 130 times [2022-02-15 01:41:38,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:38,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742282731] [2022-02-15 01:41:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:38,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:38,644 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:38,645 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:38,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:38,645 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:38,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:38,645 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:38,645 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:38,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:38,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:39,376 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:39,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742282731] [2022-02-15 01:41:39,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [742282731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:39,377 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:39,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:41:39,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659179884] [2022-02-15 01:41:39,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:39,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:41:39,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:41:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:41:39,378 INFO L87 Difference]: Start difference. First operand 538 states and 806 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:40,687 INFO L93 Difference]: Finished difference Result 545 states and 812 transitions. [2022-02-15 01:41:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:41:40,688 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:41:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:40,689 INFO L225 Difference]: With dead ends: 545 [2022-02-15 01:41:40,689 INFO L226 Difference]: Without dead ends: 538 [2022-02-15 01:41:40,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:41:40,689 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:40,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 160 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:41:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-15 01:41:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 506. [2022-02-15 01:41:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5180722891566265) internal successors, (756), 500 states have internal predecessors, (756), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 763 transitions. [2022-02-15 01:41:40,854 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 763 transitions. Word has length 77 [2022-02-15 01:41:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:40,854 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 763 transitions. [2022-02-15 01:41:40,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 763 transitions. [2022-02-15 01:41:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:41:40,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:40,854 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:40,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-15 01:41:40,855 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash -331317154, now seen corresponding path program 131 times [2022-02-15 01:41:40,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:40,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217754521] [2022-02-15 01:41:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:40,883 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:40,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:40,935 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:40,935 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:40,935 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:40,935 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:40,935 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:40,935 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:40,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:40,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:41,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:41,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217754521] [2022-02-15 01:41:41,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [217754521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:41,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:41,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:41:41,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321821455] [2022-02-15 01:41:41,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:41,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:41:41,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:41:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:41:41,743 INFO L87 Difference]: Start difference. First operand 506 states and 763 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:43,152 INFO L93 Difference]: Finished difference Result 515 states and 771 transitions. [2022-02-15 01:41:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:41:43,153 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:41:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:43,154 INFO L225 Difference]: With dead ends: 515 [2022-02-15 01:41:43,154 INFO L226 Difference]: Without dead ends: 508 [2022-02-15 01:41:43,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2696 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:41:43,155 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:43,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 162 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:41:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-02-15 01:41:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 506. [2022-02-15 01:41:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5160642570281124) internal successors, (755), 500 states have internal predecessors, (755), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 762 transitions. [2022-02-15 01:41:43,315 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 762 transitions. Word has length 77 [2022-02-15 01:41:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:43,316 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 762 transitions. [2022-02-15 01:41:43,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 762 transitions. [2022-02-15 01:41:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:41:43,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:43,316 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:43,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-15 01:41:43,316 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:43,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:43,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1018066970, now seen corresponding path program 132 times [2022-02-15 01:41:43,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:43,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223476972] [2022-02-15 01:41:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:43,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:43,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:43,425 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:43,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:43,425 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:43,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:43,426 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:43,426 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:43,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:43,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:44,231 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:44,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223476972] [2022-02-15 01:41:44,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [223476972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:44,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:44,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:41:44,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75960865] [2022-02-15 01:41:44,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:44,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:41:44,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:41:44,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:41:44,232 INFO L87 Difference]: Start difference. First operand 506 states and 762 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:45,698 INFO L93 Difference]: Finished difference Result 517 states and 772 transitions. [2022-02-15 01:41:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:41:45,699 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:41:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:45,700 INFO L225 Difference]: With dead ends: 517 [2022-02-15 01:41:45,700 INFO L226 Difference]: Without dead ends: 510 [2022-02-15 01:41:45,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:41:45,701 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:45,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 164 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:41:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-02-15 01:41:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 506. [2022-02-15 01:41:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5140562248995983) internal successors, (754), 500 states have internal predecessors, (754), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 761 transitions. [2022-02-15 01:41:45,869 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 761 transitions. Word has length 77 [2022-02-15 01:41:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:45,869 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 761 transitions. [2022-02-15 01:41:45,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 761 transitions. [2022-02-15 01:41:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:41:45,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:45,869 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:45,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-15 01:41:45,869 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:45,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2065827362, now seen corresponding path program 133 times [2022-02-15 01:41:45,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:45,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845298599] [2022-02-15 01:41:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:45,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:45,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:45,966 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:45,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:45,966 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:45,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:45,966 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:45,966 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:45,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:46,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:46,886 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:46,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845298599] [2022-02-15 01:41:46,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [845298599] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:46,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:46,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:41:46,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325004484] [2022-02-15 01:41:46,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:46,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:41:46,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:46,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:41:46,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:41:46,888 INFO L87 Difference]: Start difference. First operand 506 states and 761 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:48,576 INFO L93 Difference]: Finished difference Result 519 states and 773 transitions. [2022-02-15 01:41:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:41:48,576 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:41:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:48,577 INFO L225 Difference]: With dead ends: 519 [2022-02-15 01:41:48,577 INFO L226 Difference]: Without dead ends: 512 [2022-02-15 01:41:48,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:41:48,578 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:48,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 161 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:41:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-02-15 01:41:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 506. [2022-02-15 01:41:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5120481927710843) internal successors, (753), 500 states have internal predecessors, (753), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 760 transitions. [2022-02-15 01:41:48,775 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 760 transitions. Word has length 77 [2022-02-15 01:41:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:48,775 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 760 transitions. [2022-02-15 01:41:48,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 760 transitions. [2022-02-15 01:41:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:41:48,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:48,775 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:48,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-15 01:41:48,776 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1579118234, now seen corresponding path program 134 times [2022-02-15 01:41:48,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:48,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058136813] [2022-02-15 01:41:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:48,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:48,867 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:48,867 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:48,867 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:48,867 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:48,867 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:48,868 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:48,868 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:48,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:48,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:49,797 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:49,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058136813] [2022-02-15 01:41:49,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058136813] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:49,797 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:49,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:41:49,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593107317] [2022-02-15 01:41:49,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:49,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:41:49,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:41:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:41:49,799 INFO L87 Difference]: Start difference. First operand 506 states and 760 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:51,687 INFO L93 Difference]: Finished difference Result 521 states and 774 transitions. [2022-02-15 01:41:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:41:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:41:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:51,689 INFO L225 Difference]: With dead ends: 521 [2022-02-15 01:41:51,689 INFO L226 Difference]: Without dead ends: 514 [2022-02-15 01:41:51,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3938 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:41:51,690 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2834 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:51,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 178 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2834 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:41:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-15 01:41:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 506. [2022-02-15 01:41:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5100401606425702) internal successors, (752), 500 states have internal predecessors, (752), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 759 transitions. [2022-02-15 01:41:51,878 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 759 transitions. Word has length 77 [2022-02-15 01:41:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:51,878 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 759 transitions. [2022-02-15 01:41:51,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 759 transitions. [2022-02-15 01:41:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:41:51,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:51,879 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:51,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-15 01:41:51,879 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1500812126, now seen corresponding path program 135 times [2022-02-15 01:41:51,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:51,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396238621] [2022-02-15 01:41:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:51,905 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:51,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:51,973 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:51,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:51,973 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:51,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:51,973 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:51,973 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:51,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:52,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:52,996 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:52,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396238621] [2022-02-15 01:41:52,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [396238621] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:52,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:52,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:41:52,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624309409] [2022-02-15 01:41:52,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:52,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:41:52,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:52,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:41:52,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:41:52,997 INFO L87 Difference]: Start difference. First operand 506 states and 759 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:55,330 INFO L93 Difference]: Finished difference Result 523 states and 775 transitions. [2022-02-15 01:41:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:41:55,330 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:41:55,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:55,332 INFO L225 Difference]: With dead ends: 523 [2022-02-15 01:41:55,332 INFO L226 Difference]: Without dead ends: 516 [2022-02-15 01:41:55,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4474 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:41:55,333 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3665 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:55,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 210 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3665 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:41:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-02-15 01:41:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 506. [2022-02-15 01:41:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5080321285140563) internal successors, (751), 500 states have internal predecessors, (751), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 758 transitions. [2022-02-15 01:41:55,570 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 758 transitions. Word has length 77 [2022-02-15 01:41:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:55,570 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 758 transitions. [2022-02-15 01:41:55,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 758 transitions. [2022-02-15 01:41:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:41:55,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:55,571 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:55,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-15 01:41:55,571 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash -886356710, now seen corresponding path program 136 times [2022-02-15 01:41:55,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:55,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058755104] [2022-02-15 01:41:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:55,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:55,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:55,661 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:55,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:55,661 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:55,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:55,662 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:55,662 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:55,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:55,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:56,730 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:56,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058755104] [2022-02-15 01:41:56,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058755104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:56,731 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:56,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:41:56,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132399508] [2022-02-15 01:41:56,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:56,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:41:56,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:41:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:41:56,732 INFO L87 Difference]: Start difference. First operand 506 states and 758 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:59,298 INFO L93 Difference]: Finished difference Result 525 states and 776 transitions. [2022-02-15 01:41:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:41:59,298 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:41:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:59,299 INFO L225 Difference]: With dead ends: 525 [2022-02-15 01:41:59,300 INFO L226 Difference]: Without dead ends: 518 [2022-02-15 01:41:59,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4947 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:41:59,301 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 63 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4173 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 4283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 4173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:59,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 222 Invalid, 4283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 4173 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:41:59,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-02-15 01:41:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 506. [2022-02-15 01:41:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5060240963855422) internal successors, (750), 500 states have internal predecessors, (750), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:41:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 757 transitions. [2022-02-15 01:41:59,469 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 757 transitions. Word has length 77 [2022-02-15 01:41:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:59,469 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 757 transitions. [2022-02-15 01:41:59,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 757 transitions. [2022-02-15 01:41:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:41:59,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:59,470 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:59,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-15 01:41:59,470 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1554232098, now seen corresponding path program 137 times [2022-02-15 01:41:59,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:59,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163626480] [2022-02-15 01:41:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:59,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:59,562 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:41:59,562 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:59,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:59,563 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:59,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:59,563 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:41:59,563 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:41:59,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:59,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:00,683 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:00,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163626480] [2022-02-15 01:42:00,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [163626480] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:00,683 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:00,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:42:00,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995983455] [2022-02-15 01:42:00,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:00,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:42:00,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:42:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:42:00,685 INFO L87 Difference]: Start difference. First operand 506 states and 757 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:03,249 INFO L93 Difference]: Finished difference Result 527 states and 777 transitions. [2022-02-15 01:42:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:42:03,250 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:42:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:03,251 INFO L225 Difference]: With dead ends: 527 [2022-02-15 01:42:03,251 INFO L226 Difference]: Without dead ends: 520 [2022-02-15 01:42:03,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:42:03,253 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3830 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:03,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 194 Invalid, 3947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3830 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:42:03,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-15 01:42:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 506. [2022-02-15 01:42:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5040160642570282) internal successors, (749), 500 states have internal predecessors, (749), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 756 transitions. [2022-02-15 01:42:03,432 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 756 transitions. Word has length 77 [2022-02-15 01:42:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:03,432 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 756 transitions. [2022-02-15 01:42:03,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 756 transitions. [2022-02-15 01:42:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:42:03,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:03,433 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:03,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-02-15 01:42:03,433 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1988494438, now seen corresponding path program 138 times [2022-02-15 01:42:03,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:03,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643973029] [2022-02-15 01:42:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:03,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:03,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:03,544 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:03,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:03,544 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:03,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:03,545 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:03,545 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:03,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:03,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:04,796 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:04,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643973029] [2022-02-15 01:42:04,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643973029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:04,797 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:04,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:42:04,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354663773] [2022-02-15 01:42:04,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:04,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:42:04,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:42:04,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:42:04,798 INFO L87 Difference]: Start difference. First operand 506 states and 756 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:07,517 INFO L93 Difference]: Finished difference Result 529 states and 778 transitions. [2022-02-15 01:42:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:42:07,518 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:42:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:07,519 INFO L225 Difference]: With dead ends: 529 [2022-02-15 01:42:07,519 INFO L226 Difference]: Without dead ends: 522 [2022-02-15 01:42:07,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5979 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=571, Invalid=15941, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:42:07,520 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4462 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 4585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:07,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 211 Invalid, 4585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4462 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:42:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-02-15 01:42:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 506. [2022-02-15 01:42:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.502008032128514) internal successors, (748), 500 states have internal predecessors, (748), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 755 transitions. [2022-02-15 01:42:07,689 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 755 transitions. Word has length 77 [2022-02-15 01:42:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:07,690 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 755 transitions. [2022-02-15 01:42:07,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 755 transitions. [2022-02-15 01:42:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:42:07,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:07,690 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:07,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-02-15 01:42:07,690 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:07,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2112693854, now seen corresponding path program 139 times [2022-02-15 01:42:07,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:07,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824790207] [2022-02-15 01:42:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:07,720 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:07,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:07,771 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:07,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:07,771 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:07,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:07,771 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:07,771 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:07,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:09,155 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:09,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824790207] [2022-02-15 01:42:09,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824790207] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:09,156 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:09,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:42:09,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242543009] [2022-02-15 01:42:09,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:09,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:42:09,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:42:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:42:09,157 INFO L87 Difference]: Start difference. First operand 506 states and 755 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:12,648 INFO L93 Difference]: Finished difference Result 530 states and 778 transitions. [2022-02-15 01:42:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:42:12,648 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:42:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:12,649 INFO L225 Difference]: With dead ends: 530 [2022-02-15 01:42:12,649 INFO L226 Difference]: Without dead ends: 523 [2022-02-15 01:42:12,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=600, Invalid=17490, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:42:12,650 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 73 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 5638 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 5766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 5638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:12,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 248 Invalid, 5766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 5638 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:42:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-15 01:42:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 506. [2022-02-15 01:42:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 498 states have (on average 1.5) internal successors, (747), 500 states have internal predecessors, (747), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 754 transitions. [2022-02-15 01:42:12,804 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 754 transitions. Word has length 77 [2022-02-15 01:42:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:12,805 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 754 transitions. [2022-02-15 01:42:12,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 754 transitions. [2022-02-15 01:42:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:42:12,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:12,805 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:12,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-02-15 01:42:12,805 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash -55340518, now seen corresponding path program 140 times [2022-02-15 01:42:12,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:12,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596200813] [2022-02-15 01:42:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:12,843 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:12,895 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:12,895 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:12,895 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:12,895 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:12,895 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:12,895 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:12,896 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:12,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:14,333 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:14,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596200813] [2022-02-15 01:42:14,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596200813] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:14,334 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:14,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:42:14,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888089867] [2022-02-15 01:42:14,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:14,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:42:14,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:14,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:42:14,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:42:14,335 INFO L87 Difference]: Start difference. First operand 506 states and 754 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:18,647 INFO L93 Difference]: Finished difference Result 635 states and 945 transitions. [2022-02-15 01:42:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:42:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:42:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:18,649 INFO L225 Difference]: With dead ends: 635 [2022-02-15 01:42:18,649 INFO L226 Difference]: Without dead ends: 607 [2022-02-15 01:42:18,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7353 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=625, Invalid=19115, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:42:18,650 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 80 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 8114 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 8313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 8114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:18,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 280 Invalid, 8313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 8114 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 01:42:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-02-15 01:42:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 569. [2022-02-15 01:42:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 561 states have (on average 1.516934046345811) internal successors, (851), 563 states have internal predecessors, (851), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 858 transitions. [2022-02-15 01:42:18,829 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 858 transitions. Word has length 77 [2022-02-15 01:42:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:18,829 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 858 transitions. [2022-02-15 01:42:18,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 858 transitions. [2022-02-15 01:42:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:42:18,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:18,830 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:18,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-02-15 01:42:18,830 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:18,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1719666844, now seen corresponding path program 141 times [2022-02-15 01:42:18,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:18,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692533310] [2022-02-15 01:42:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:18,867 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:18,917 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:18,917 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:18,917 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:18,917 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:18,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:18,918 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:18,918 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:18,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:20,427 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:20,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692533310] [2022-02-15 01:42:20,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [692533310] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:20,427 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:20,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-15 01:42:20,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193910553] [2022-02-15 01:42:20,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:20,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-15 01:42:20,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:20,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-15 01:42:20,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=5185, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:42:20,428 INFO L87 Difference]: Start difference. First operand 569 states and 858 transitions. Second operand has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:24,370 INFO L93 Difference]: Finished difference Result 600 states and 891 transitions. [2022-02-15 01:42:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 01:42:24,370 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:42:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:24,371 INFO L225 Difference]: With dead ends: 600 [2022-02-15 01:42:24,371 INFO L226 Difference]: Without dead ends: 592 [2022-02-15 01:42:24,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7881 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=645, Invalid=20235, Unknown=0, NotChecked=0, Total=20880 [2022-02-15 01:42:24,372 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6904 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 7056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 6904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:24,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 276 Invalid, 7056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 6904 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 01:42:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-15 01:42:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 571. [2022-02-15 01:42:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5150976909413854) internal successors, (853), 565 states have internal predecessors, (853), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 860 transitions. [2022-02-15 01:42:24,567 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 860 transitions. Word has length 77 [2022-02-15 01:42:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:24,567 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 860 transitions. [2022-02-15 01:42:24,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 860 transitions. [2022-02-15 01:42:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:24,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:24,568 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:24,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-02-15 01:42:24,568 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1055828386, now seen corresponding path program 142 times [2022-02-15 01:42:24,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:24,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751735815] [2022-02-15 01:42:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:24,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:24,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:24,664 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:24,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:24,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:24,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:24,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:24,664 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:24,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:24,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:25,447 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:25,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751735815] [2022-02-15 01:42:25,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1751735815] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:25,447 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:25,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:42:25,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896353983] [2022-02-15 01:42:25,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:25,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:42:25,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:42:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:42:25,448 INFO L87 Difference]: Start difference. First operand 571 states and 860 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:26,791 INFO L93 Difference]: Finished difference Result 579 states and 867 transitions. [2022-02-15 01:42:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:42:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:42:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:26,793 INFO L225 Difference]: With dead ends: 579 [2022-02-15 01:42:26,793 INFO L226 Difference]: Without dead ends: 572 [2022-02-15 01:42:26,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:42:26,794 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:26,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 151 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1754 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:42:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-02-15 01:42:26,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 571. [2022-02-15 01:42:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5133214920071048) internal successors, (852), 565 states have internal predecessors, (852), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 859 transitions. [2022-02-15 01:42:26,977 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 859 transitions. Word has length 80 [2022-02-15 01:42:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:26,977 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 859 transitions. [2022-02-15 01:42:26,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 859 transitions. [2022-02-15 01:42:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:26,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:26,978 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:26,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-02-15 01:42:26,978 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash -335624090, now seen corresponding path program 143 times [2022-02-15 01:42:26,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:26,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945424578] [2022-02-15 01:42:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:27,007 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:27,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:27,083 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:27,083 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:27,083 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:27,083 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:27,083 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:27,083 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:27,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:27,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:27,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:27,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945424578] [2022-02-15 01:42:27,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945424578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:27,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:27,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:42:27,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939453518] [2022-02-15 01:42:27,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:27,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:42:27,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:42:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:42:27,910 INFO L87 Difference]: Start difference. First operand 571 states and 859 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:29,334 INFO L93 Difference]: Finished difference Result 581 states and 868 transitions. [2022-02-15 01:42:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:42:29,335 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:42:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:29,339 INFO L225 Difference]: With dead ends: 581 [2022-02-15 01:42:29,339 INFO L226 Difference]: Without dead ends: 574 [2022-02-15 01:42:29,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3074 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:42:29,340 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:29,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 148 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:42:29,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-02-15 01:42:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 571. [2022-02-15 01:42:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5115452930728241) internal successors, (851), 565 states have internal predecessors, (851), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 858 transitions. [2022-02-15 01:42:29,509 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 858 transitions. Word has length 80 [2022-02-15 01:42:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:29,509 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 858 transitions. [2022-02-15 01:42:29,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 858 transitions. [2022-02-15 01:42:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:29,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:29,509 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:29,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-02-15 01:42:29,509 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:29,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1013760034, now seen corresponding path program 144 times [2022-02-15 01:42:29,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:29,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099354641] [2022-02-15 01:42:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:29,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:29,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:29,583 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:29,583 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:29,583 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:29,583 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:29,583 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:29,583 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:29,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:29,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:30,495 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:30,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099354641] [2022-02-15 01:42:30,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099354641] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:30,496 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:30,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:42:30,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544816861] [2022-02-15 01:42:30,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:30,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:42:30,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:42:30,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:42:30,497 INFO L87 Difference]: Start difference. First operand 571 states and 858 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:32,372 INFO L93 Difference]: Finished difference Result 583 states and 869 transitions. [2022-02-15 01:42:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:42:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:42:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:32,374 INFO L225 Difference]: With dead ends: 583 [2022-02-15 01:42:32,374 INFO L226 Difference]: Without dead ends: 576 [2022-02-15 01:42:32,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3473 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:42:32,375 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2513 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:32,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 175 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:42:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-02-15 01:42:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 571. [2022-02-15 01:42:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5097690941385435) internal successors, (850), 565 states have internal predecessors, (850), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 857 transitions. [2022-02-15 01:42:32,569 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 857 transitions. Word has length 80 [2022-02-15 01:42:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:32,569 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 857 transitions. [2022-02-15 01:42:32,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 857 transitions. [2022-02-15 01:42:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:32,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:32,569 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:32,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-02-15 01:42:32,570 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:32,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:32,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2070134298, now seen corresponding path program 145 times [2022-02-15 01:42:32,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:32,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160429084] [2022-02-15 01:42:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:32,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:32,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:32,647 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:32,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:32,648 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:32,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:32,648 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:32,648 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:32,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:32,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:33,603 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:33,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160429084] [2022-02-15 01:42:33,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160429084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:33,603 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:33,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:42:33,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915722515] [2022-02-15 01:42:33,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:33,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:42:33,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:42:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:42:33,604 INFO L87 Difference]: Start difference. First operand 571 states and 857 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:35,536 INFO L93 Difference]: Finished difference Result 585 states and 870 transitions. [2022-02-15 01:42:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:42:35,536 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:42:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:35,537 INFO L225 Difference]: With dead ends: 585 [2022-02-15 01:42:35,537 INFO L226 Difference]: Without dead ends: 578 [2022-02-15 01:42:35,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3966 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:42:35,538 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2766 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:35,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 177 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2766 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:42:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-02-15 01:42:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 571. [2022-02-15 01:42:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.507992895204263) internal successors, (849), 565 states have internal predecessors, (849), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 856 transitions. [2022-02-15 01:42:35,737 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 856 transitions. Word has length 80 [2022-02-15 01:42:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:35,738 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 856 transitions. [2022-02-15 01:42:35,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 856 transitions. [2022-02-15 01:42:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:35,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:35,738 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:35,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-02-15 01:42:35,738 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:35,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1574811298, now seen corresponding path program 146 times [2022-02-15 01:42:35,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:35,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280268801] [2022-02-15 01:42:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:35,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:35,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:35,845 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:35,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:35,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:35,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:35,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:35,845 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:35,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:36,871 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:36,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280268801] [2022-02-15 01:42:36,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [280268801] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:36,871 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:36,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:42:36,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214911821] [2022-02-15 01:42:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:36,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:42:36,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:42:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:42:36,872 INFO L87 Difference]: Start difference. First operand 571 states and 856 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:39,284 INFO L93 Difference]: Finished difference Result 587 states and 871 transitions. [2022-02-15 01:42:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:42:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:42:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:39,285 INFO L225 Difference]: With dead ends: 587 [2022-02-15 01:42:39,285 INFO L226 Difference]: Without dead ends: 580 [2022-02-15 01:42:39,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4467 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:42:39,286 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3772 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 3876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:39,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 219 Invalid, 3876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3772 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:42:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-15 01:42:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 571. [2022-02-15 01:42:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5062166962699823) internal successors, (848), 565 states have internal predecessors, (848), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 855 transitions. [2022-02-15 01:42:39,493 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 855 transitions. Word has length 80 [2022-02-15 01:42:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:39,493 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 855 transitions. [2022-02-15 01:42:39,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 855 transitions. [2022-02-15 01:42:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:39,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:39,494 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:39,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-02-15 01:42:39,494 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:39,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1496505190, now seen corresponding path program 147 times [2022-02-15 01:42:39,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:39,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329083915] [2022-02-15 01:42:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:39,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:39,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:39,581 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:39,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:39,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:39,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:39,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:39,581 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:39,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:39,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:40,728 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:40,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329083915] [2022-02-15 01:42:40,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1329083915] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:40,729 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:40,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:42:40,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116985879] [2022-02-15 01:42:40,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:40,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:42:40,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:40,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:42:40,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:42:40,730 INFO L87 Difference]: Start difference. First operand 571 states and 855 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:43,379 INFO L93 Difference]: Finished difference Result 589 states and 872 transitions. [2022-02-15 01:42:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:42:43,379 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:42:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:43,380 INFO L225 Difference]: With dead ends: 589 [2022-02-15 01:42:43,380 INFO L226 Difference]: Without dead ends: 582 [2022-02-15 01:42:43,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4880 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=517, Invalid=13055, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:42:43,382 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3891 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 4002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:43,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 211 Invalid, 4002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3891 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:42:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-02-15 01:42:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 571. [2022-02-15 01:42:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5044404973357015) internal successors, (847), 565 states have internal predecessors, (847), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 854 transitions. [2022-02-15 01:42:43,633 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 854 transitions. Word has length 80 [2022-02-15 01:42:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:43,633 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 854 transitions. [2022-02-15 01:42:43,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 854 transitions. [2022-02-15 01:42:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:43,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:43,634 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:43,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-02-15 01:42:43,634 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:43,634 INFO L85 PathProgramCache]: Analyzing trace with hash -890663646, now seen corresponding path program 148 times [2022-02-15 01:42:43,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:43,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54416416] [2022-02-15 01:42:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:43,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:43,727 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:43,727 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:43,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:43,728 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:43,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:43,728 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:43,728 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:43,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:43,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:44,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:44,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54416416] [2022-02-15 01:42:44,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [54416416] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:44,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:44,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:42:44,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567080838] [2022-02-15 01:42:44,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:44,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:42:44,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:42:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:42:44,901 INFO L87 Difference]: Start difference. First operand 571 states and 854 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:47,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:47,709 INFO L93 Difference]: Finished difference Result 591 states and 873 transitions. [2022-02-15 01:42:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:42:47,710 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:42:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:47,711 INFO L225 Difference]: With dead ends: 591 [2022-02-15 01:42:47,711 INFO L226 Difference]: Without dead ends: 584 [2022-02-15 01:42:47,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5524 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:42:47,712 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4305 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 4421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:47,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 218 Invalid, 4421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4305 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:42:47,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-02-15 01:42:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 571. [2022-02-15 01:42:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.502664298401421) internal successors, (846), 565 states have internal predecessors, (846), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 853 transitions. [2022-02-15 01:42:47,980 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 853 transitions. Word has length 80 [2022-02-15 01:42:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:47,980 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 853 transitions. [2022-02-15 01:42:47,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 853 transitions. [2022-02-15 01:42:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:47,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:47,981 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:47,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-02-15 01:42:47,981 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:47,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1558539034, now seen corresponding path program 149 times [2022-02-15 01:42:47,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:47,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542171991] [2022-02-15 01:42:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:48,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:48,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:48,082 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:48,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:48,082 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:48,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:48,082 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:48,082 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:48,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:48,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:49,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:49,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542171991] [2022-02-15 01:42:49,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1542171991] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:49,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:49,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:42:49,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719406567] [2022-02-15 01:42:49,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:49,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:42:49,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:49,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:42:49,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:42:49,322 INFO L87 Difference]: Start difference. First operand 571 states and 853 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:52,656 INFO L93 Difference]: Finished difference Result 593 states and 874 transitions. [2022-02-15 01:42:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:42:52,656 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:42:52,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:52,658 INFO L225 Difference]: With dead ends: 593 [2022-02-15 01:42:52,658 INFO L226 Difference]: Without dead ends: 586 [2022-02-15 01:42:52,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6089 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:42:52,659 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 5442 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 5565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 5442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:52,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 255 Invalid, 5565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 5442 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:42:52,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-15 01:42:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 571. [2022-02-15 01:42:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.5008880994671403) internal successors, (845), 565 states have internal predecessors, (845), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 852 transitions. [2022-02-15 01:42:52,867 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 852 transitions. Word has length 80 [2022-02-15 01:42:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:52,867 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 852 transitions. [2022-02-15 01:42:52,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 852 transitions. [2022-02-15 01:42:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:52,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:52,868 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:52,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-02-15 01:42:52,868 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1992801374, now seen corresponding path program 150 times [2022-02-15 01:42:52,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:52,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653326356] [2022-02-15 01:42:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:52,896 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:52,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:52,948 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:52,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:52,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:52,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:52,949 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:52,949 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:52,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:54,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:54,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653326356] [2022-02-15 01:42:54,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [653326356] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:54,347 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:54,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:42:54,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9411318] [2022-02-15 01:42:54,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:54,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:42:54,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:54,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:42:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:42:54,349 INFO L87 Difference]: Start difference. First operand 571 states and 852 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:42:57,332 INFO L93 Difference]: Finished difference Result 595 states and 875 transitions. [2022-02-15 01:42:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:42:57,333 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:42:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:42:57,334 INFO L225 Difference]: With dead ends: 595 [2022-02-15 01:42:57,334 INFO L226 Difference]: Without dead ends: 588 [2022-02-15 01:42:57,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6592 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=598, Invalid=17492, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:42:57,335 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4430 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 4559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 4430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:42:57,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 202 Invalid, 4559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 4430 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:42:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-15 01:42:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 571. [2022-02-15 01:42:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.4991119005328597) internal successors, (844), 565 states have internal predecessors, (844), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:42:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 851 transitions. [2022-02-15 01:42:57,529 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 851 transitions. Word has length 80 [2022-02-15 01:42:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:42:57,529 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 851 transitions. [2022-02-15 01:42:57,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:42:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 851 transitions. [2022-02-15 01:42:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:42:57,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:42:57,530 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:42:57,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-02-15 01:42:57,530 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:42:57,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:42:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2108386918, now seen corresponding path program 151 times [2022-02-15 01:42:57,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:42:57,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94706874] [2022-02-15 01:42:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:42:57,559 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:57,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:42:57,627 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:57,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:57,627 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:57,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:42:57,627 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:42:57,627 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:42:57,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:42:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:57,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:42:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:42:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:42:59,099 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:42:59,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94706874] [2022-02-15 01:42:59,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [94706874] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:42:59,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:42:59,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:42:59,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331506971] [2022-02-15 01:42:59,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:42:59,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:42:59,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:42:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:42:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:42:59,101 INFO L87 Difference]: Start difference. First operand 571 states and 851 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:02,452 INFO L93 Difference]: Finished difference Result 596 states and 875 transitions. [2022-02-15 01:43:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:43:02,452 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:43:02,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:02,453 INFO L225 Difference]: With dead ends: 596 [2022-02-15 01:43:02,453 INFO L226 Difference]: Without dead ends: 589 [2022-02-15 01:43:02,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7347 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:43:02,455 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 81 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5379 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 5513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 5379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:02,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 229 Invalid, 5513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 5379 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:43:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-02-15 01:43:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 571. [2022-02-15 01:43:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 563 states have (on average 1.497335701598579) internal successors, (843), 565 states have internal predecessors, (843), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 850 transitions. [2022-02-15 01:43:02,648 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 850 transitions. Word has length 80 [2022-02-15 01:43:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:02,648 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 850 transitions. [2022-02-15 01:43:02,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 850 transitions. [2022-02-15 01:43:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:43:02,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:02,649 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:02,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-02-15 01:43:02,649 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -59647454, now seen corresponding path program 152 times [2022-02-15 01:43:02,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:02,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161509638] [2022-02-15 01:43:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:02,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:02,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:02,750 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:02,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:02,750 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:02,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:02,750 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:02,751 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:02,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:04,354 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:04,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161509638] [2022-02-15 01:43:04,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [161509638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:04,354 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:04,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:43:04,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682157110] [2022-02-15 01:43:04,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:04,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:43:04,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:43:04,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:43:04,356 INFO L87 Difference]: Start difference. First operand 571 states and 850 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:08,860 INFO L93 Difference]: Finished difference Result 706 states and 1050 transitions. [2022-02-15 01:43:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:43:08,861 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:43:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:08,862 INFO L225 Difference]: With dead ends: 706 [2022-02-15 01:43:08,862 INFO L226 Difference]: Without dead ends: 677 [2022-02-15 01:43:08,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8032 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=652, Invalid=20810, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:43:08,864 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 81 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 8471 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 8471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:08,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 282 Invalid, 8680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 8471 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 01:43:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-02-15 01:43:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 637. [2022-02-15 01:43:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 629 states have (on average 1.5135135135135136) internal successors, (952), 631 states have internal predecessors, (952), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 959 transitions. [2022-02-15 01:43:09,069 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 959 transitions. Word has length 80 [2022-02-15 01:43:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:09,069 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 959 transitions. [2022-02-15 01:43:09,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 959 transitions. [2022-02-15 01:43:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:43:09,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:09,069 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:09,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-02-15 01:43:09,070 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1715359908, now seen corresponding path program 153 times [2022-02-15 01:43:09,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:09,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11022320] [2022-02-15 01:43:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:09,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:09,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:09,171 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:09,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:09,171 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:09,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:09,171 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:09,171 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:09,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:09,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:10,735 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:10,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11022320] [2022-02-15 01:43:10,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [11022320] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:10,735 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:10,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 01:43:10,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975381482] [2022-02-15 01:43:10,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:10,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 01:43:10,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:10,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 01:43:10,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=5626, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:43:10,736 INFO L87 Difference]: Start difference. First operand 637 states and 959 transitions. Second operand has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:14,632 INFO L93 Difference]: Finished difference Result 669 states and 993 transitions. [2022-02-15 01:43:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 01:43:14,632 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:43:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:14,633 INFO L225 Difference]: With dead ends: 669 [2022-02-15 01:43:14,633 INFO L226 Difference]: Without dead ends: 661 [2022-02-15 01:43:14,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8584 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=672, Invalid=21978, Unknown=0, NotChecked=0, Total=22650 [2022-02-15 01:43:14,634 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 98 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6621 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 6780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 6621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:14,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 257 Invalid, 6780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 6621 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 01:43:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-02-15 01:43:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 639. [2022-02-15 01:43:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 631 states have (on average 1.5118858954041206) internal successors, (954), 633 states have internal predecessors, (954), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 961 transitions. [2022-02-15 01:43:14,834 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 961 transitions. Word has length 80 [2022-02-15 01:43:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:14,834 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 961 transitions. [2022-02-15 01:43:14,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 961 transitions. [2022-02-15 01:43:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:14,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:14,834 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:14,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-02-15 01:43:14,835 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -666711586, now seen corresponding path program 154 times [2022-02-15 01:43:14,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:14,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112913163] [2022-02-15 01:43:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:14,874 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:14,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:14,948 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:14,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:14,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:14,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:14,949 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:14,949 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:14,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:14,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:15,727 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:15,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112913163] [2022-02-15 01:43:15,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112913163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:15,728 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:15,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:43:15,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667645947] [2022-02-15 01:43:15,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:15,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:43:15,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:43:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:43:15,729 INFO L87 Difference]: Start difference. First operand 639 states and 961 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:17,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:17,226 INFO L93 Difference]: Finished difference Result 646 states and 967 transitions. [2022-02-15 01:43:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:43:17,227 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:17,228 INFO L225 Difference]: With dead ends: 646 [2022-02-15 01:43:17,228 INFO L226 Difference]: Without dead ends: 639 [2022-02-15 01:43:17,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=384, Invalid=7098, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:43:17,229 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:17,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 170 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:43:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-15 01:43:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 604. [2022-02-15 01:43:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5218120805369129) internal successors, (907), 598 states have internal predecessors, (907), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 914 transitions. [2022-02-15 01:43:17,482 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 914 transitions. Word has length 83 [2022-02-15 01:43:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:17,482 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 914 transitions. [2022-02-15 01:43:17,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 914 transitions. [2022-02-15 01:43:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:17,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:17,482 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:17,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-02-15 01:43:17,483 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:17,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1596916890, now seen corresponding path program 155 times [2022-02-15 01:43:17,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:17,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216206085] [2022-02-15 01:43:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:17,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:17,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:17,606 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:17,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:17,606 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:17,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:17,607 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:17,607 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:17,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:17,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:18,472 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:18,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216206085] [2022-02-15 01:43:18,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216206085] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:18,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:18,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:43:18,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457313697] [2022-02-15 01:43:18,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:18,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:43:18,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:18,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:43:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:43:18,474 INFO L87 Difference]: Start difference. First operand 604 states and 914 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:20,093 INFO L93 Difference]: Finished difference Result 613 states and 922 transitions. [2022-02-15 01:43:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:43:20,094 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:20,095 INFO L225 Difference]: With dead ends: 613 [2022-02-15 01:43:20,095 INFO L226 Difference]: Without dead ends: 606 [2022-02-15 01:43:20,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:43:20,096 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:20,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 177 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:43:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-02-15 01:43:20,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 604. [2022-02-15 01:43:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5201342281879195) internal successors, (906), 598 states have internal predecessors, (906), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 913 transitions. [2022-02-15 01:43:20,290 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 913 transitions. Word has length 83 [2022-02-15 01:43:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:20,290 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 913 transitions. [2022-02-15 01:43:20,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 913 transitions. [2022-02-15 01:43:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:20,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:20,290 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:20,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-02-15 01:43:20,291 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:20,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:20,291 INFO L85 PathProgramCache]: Analyzing trace with hash 205464414, now seen corresponding path program 156 times [2022-02-15 01:43:20,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:20,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415501653] [2022-02-15 01:43:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:20,332 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:20,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:20,400 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:20,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:20,400 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:20,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:20,400 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:20,401 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:20,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:20,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:21,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:21,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415501653] [2022-02-15 01:43:21,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415501653] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:21,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:21,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:43:21,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925827392] [2022-02-15 01:43:21,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:21,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:43:21,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:21,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:43:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:43:21,358 INFO L87 Difference]: Start difference. First operand 604 states and 913 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:23,113 INFO L93 Difference]: Finished difference Result 615 states and 923 transitions. [2022-02-15 01:43:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:43:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:23,115 INFO L225 Difference]: With dead ends: 615 [2022-02-15 01:43:23,115 INFO L226 Difference]: Without dead ends: 608 [2022-02-15 01:43:23,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3445 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:43:23,116 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2373 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:23,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 169 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2373 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:43:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-02-15 01:43:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 604. [2022-02-15 01:43:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5184563758389262) internal successors, (905), 598 states have internal predecessors, (905), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 912 transitions. [2022-02-15 01:43:23,351 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 912 transitions. Word has length 83 [2022-02-15 01:43:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:23,352 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 912 transitions. [2022-02-15 01:43:23,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 912 transitions. [2022-02-15 01:43:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:23,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:23,352 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:23,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-02-15 01:43:23,353 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:23,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1554848538, now seen corresponding path program 157 times [2022-02-15 01:43:23,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:23,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722131040] [2022-02-15 01:43:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:23,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:23,451 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:23,451 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:23,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:23,452 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:23,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:23,452 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:23,452 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:23,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:23,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:24,477 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:24,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722131040] [2022-02-15 01:43:24,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [722131040] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:24,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:24,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:43:24,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226407604] [2022-02-15 01:43:24,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:24,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:43:24,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:24,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:43:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:43:24,478 INFO L87 Difference]: Start difference. First operand 604 states and 912 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:26,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:26,554 INFO L93 Difference]: Finished difference Result 617 states and 924 transitions. [2022-02-15 01:43:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:43:26,554 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:26,555 INFO L225 Difference]: With dead ends: 617 [2022-02-15 01:43:26,556 INFO L226 Difference]: Without dead ends: 610 [2022-02-15 01:43:26,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:43:26,556 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2962 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:26,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 191 Invalid, 3060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2962 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:43:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-15 01:43:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 604. [2022-02-15 01:43:26,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.516778523489933) internal successors, (904), 598 states have internal predecessors, (904), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 911 transitions. [2022-02-15 01:43:26,791 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 911 transitions. Word has length 83 [2022-02-15 01:43:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:26,791 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 911 transitions. [2022-02-15 01:43:26,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 911 transitions. [2022-02-15 01:43:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:26,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:26,792 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:26,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-02-15 01:43:26,792 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:26,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:26,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1529045794, now seen corresponding path program 158 times [2022-02-15 01:43:26,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:26,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977441938] [2022-02-15 01:43:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:26,830 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:26,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:26,901 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:26,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:26,901 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:26,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:26,901 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:26,901 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:26,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:27,921 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:27,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977441938] [2022-02-15 01:43:27,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [977441938] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:27,921 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:27,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:43:27,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176097005] [2022-02-15 01:43:27,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:27,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:43:27,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:43:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:43:27,922 INFO L87 Difference]: Start difference. First operand 604 states and 911 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:30,124 INFO L93 Difference]: Finished difference Result 619 states and 925 transitions. [2022-02-15 01:43:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:43:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:30,125 INFO L225 Difference]: With dead ends: 619 [2022-02-15 01:43:30,126 INFO L226 Difference]: Without dead ends: 612 [2022-02-15 01:43:30,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4345 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=11720, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:43:30,126 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3145 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 3250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:30,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 188 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:43:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-02-15 01:43:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 604. [2022-02-15 01:43:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5151006711409396) internal successors, (903), 598 states have internal predecessors, (903), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 910 transitions. [2022-02-15 01:43:30,354 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 910 transitions. Word has length 83 [2022-02-15 01:43:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:30,355 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 910 transitions. [2022-02-15 01:43:30,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 910 transitions. [2022-02-15 01:43:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:30,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:30,355 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:30,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-02-15 01:43:30,356 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:30,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2115899802, now seen corresponding path program 159 times [2022-02-15 01:43:30,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:30,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455721261] [2022-02-15 01:43:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:30,384 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:30,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:30,437 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:30,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:30,438 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:30,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:30,438 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:30,438 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:30,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:30,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:31,542 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:31,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455721261] [2022-02-15 01:43:31,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [455721261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:31,542 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:31,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:43:31,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950563556] [2022-02-15 01:43:31,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:31,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:43:31,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:43:31,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:43:31,543 INFO L87 Difference]: Start difference. First operand 604 states and 910 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:34,161 INFO L93 Difference]: Finished difference Result 621 states and 926 transitions. [2022-02-15 01:43:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:43:34,162 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:34,163 INFO L225 Difference]: With dead ends: 621 [2022-02-15 01:43:34,163 INFO L226 Difference]: Without dead ends: 614 [2022-02-15 01:43:34,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4966 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:43:34,164 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3914 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:34,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 215 Invalid, 4025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3914 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:43:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-02-15 01:43:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 604. [2022-02-15 01:43:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5134228187919463) internal successors, (902), 598 states have internal predecessors, (902), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 909 transitions. [2022-02-15 01:43:34,391 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 909 transitions. Word has length 83 [2022-02-15 01:43:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:34,391 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 909 transitions. [2022-02-15 01:43:34,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 909 transitions. [2022-02-15 01:43:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:34,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:34,392 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:34,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-02-15 01:43:34,392 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2037593694, now seen corresponding path program 160 times [2022-02-15 01:43:34,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:34,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427622233] [2022-02-15 01:43:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:34,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:34,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:34,489 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:34,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:34,489 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:34,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:34,490 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:34,490 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:34,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:34,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:35,658 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:35,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427622233] [2022-02-15 01:43:35,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427622233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:35,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:35,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:43:35,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716410499] [2022-02-15 01:43:35,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:35,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:43:35,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:43:35,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:43:35,660 INFO L87 Difference]: Start difference. First operand 604 states and 909 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:38,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:38,469 INFO L93 Difference]: Finished difference Result 623 states and 927 transitions. [2022-02-15 01:43:38,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:43:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:38,471 INFO L225 Difference]: With dead ends: 623 [2022-02-15 01:43:38,471 INFO L226 Difference]: Without dead ends: 616 [2022-02-15 01:43:38,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5441 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=544, Invalid=14462, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:43:38,473 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4119 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 4235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:38,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 212 Invalid, 4235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4119 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:43:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-02-15 01:43:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 604. [2022-02-15 01:43:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.511744966442953) internal successors, (901), 598 states have internal predecessors, (901), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 908 transitions. [2022-02-15 01:43:38,709 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 908 transitions. Word has length 83 [2022-02-15 01:43:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:38,709 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 908 transitions. [2022-02-15 01:43:38,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 908 transitions. [2022-02-15 01:43:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:38,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:38,710 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:38,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-02-15 01:43:38,710 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:38,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash -349575142, now seen corresponding path program 161 times [2022-02-15 01:43:38,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:38,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167108242] [2022-02-15 01:43:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:38,751 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:38,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:38,805 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:38,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:38,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:38,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:38,806 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:38,806 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:38,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:38,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:40,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:40,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167108242] [2022-02-15 01:43:40,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167108242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:40,149 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:40,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:43:40,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601956521] [2022-02-15 01:43:40,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:40,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:43:40,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:40,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:43:40,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:43:40,150 INFO L87 Difference]: Start difference. First operand 604 states and 908 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:43,156 INFO L93 Difference]: Finished difference Result 625 states and 928 transitions. [2022-02-15 01:43:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:43:43,157 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:43,158 INFO L225 Difference]: With dead ends: 625 [2022-02-15 01:43:43,158 INFO L226 Difference]: Without dead ends: 618 [2022-02-15 01:43:43,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6121 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:43:43,159 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4312 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 4434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:43,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 209 Invalid, 4434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4312 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:43:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-02-15 01:43:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 604. [2022-02-15 01:43:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5100671140939597) internal successors, (900), 598 states have internal predecessors, (900), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 907 transitions. [2022-02-15 01:43:43,367 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 907 transitions. Word has length 83 [2022-02-15 01:43:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:43,367 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 907 transitions. [2022-02-15 01:43:43,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 907 transitions. [2022-02-15 01:43:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:43,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:43,368 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:43,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-02-15 01:43:43,368 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1017450530, now seen corresponding path program 162 times [2022-02-15 01:43:43,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:43,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037369764] [2022-02-15 01:43:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:43,395 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:43,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:43,460 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:43,461 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:43,461 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:43,461 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:43,461 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:43,461 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:43,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:43,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:44,851 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:44,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037369764] [2022-02-15 01:43:44,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037369764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:44,851 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:44,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:43:44,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495233954] [2022-02-15 01:43:44,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:44,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:43:44,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:43:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:43:44,853 INFO L87 Difference]: Start difference. First operand 604 states and 907 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:48,248 INFO L93 Difference]: Finished difference Result 627 states and 929 transitions. [2022-02-15 01:43:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:43:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:48,250 INFO L225 Difference]: With dead ends: 627 [2022-02-15 01:43:48,250 INFO L226 Difference]: Without dead ends: 620 [2022-02-15 01:43:48,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6737 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=600, Invalid=17490, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:43:48,251 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 74 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5224 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 5353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 5224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:48,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 236 Invalid, 5353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 5224 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:43:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-02-15 01:43:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 604. [2022-02-15 01:43:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5083892617449663) internal successors, (899), 598 states have internal predecessors, (899), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 906 transitions. [2022-02-15 01:43:48,478 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 906 transitions. Word has length 83 [2022-02-15 01:43:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:48,478 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 906 transitions. [2022-02-15 01:43:48,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 906 transitions. [2022-02-15 01:43:48,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:48,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:48,479 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:48,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-02-15 01:43:48,479 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1451712870, now seen corresponding path program 163 times [2022-02-15 01:43:48,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:48,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245161971] [2022-02-15 01:43:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:48,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:48,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:48,590 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:48,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:48,590 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:48,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:48,590 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:48,590 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:48,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:48,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:50,089 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:50,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245161971] [2022-02-15 01:43:50,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [245161971] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:50,089 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:50,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:43:50,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362765374] [2022-02-15 01:43:50,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:50,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:43:50,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:43:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:43:50,090 INFO L87 Difference]: Start difference. First operand 604 states and 906 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:53,785 INFO L93 Difference]: Finished difference Result 629 states and 930 transitions. [2022-02-15 01:43:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:43:53,785 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:53,786 INFO L225 Difference]: With dead ends: 629 [2022-02-15 01:43:53,786 INFO L226 Difference]: Without dead ends: 622 [2022-02-15 01:43:53,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7362 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:43:53,787 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 73 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 5946 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 6080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 5946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:53,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 253 Invalid, 6080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 5946 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:43:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-02-15 01:43:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 604. [2022-02-15 01:43:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.5067114093959733) internal successors, (898), 598 states have internal predecessors, (898), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 905 transitions. [2022-02-15 01:43:53,980 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 905 transitions. Word has length 83 [2022-02-15 01:43:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:53,981 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 905 transitions. [2022-02-15 01:43:53,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 905 transitions. [2022-02-15 01:43:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:53,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:53,981 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:53,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-02-15 01:43:53,981 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1645491874, now seen corresponding path program 164 times [2022-02-15 01:43:53,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:53,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181650801] [2022-02-15 01:43:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:54,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:54,064 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:54,065 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:54,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:54,065 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:54,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:54,065 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:54,065 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:54,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:54,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:43:55,614 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:43:55,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181650801] [2022-02-15 01:43:55,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [181650801] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:43:55,615 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:43:55,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:43:55,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131085822] [2022-02-15 01:43:55,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:43:55,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:43:55,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:43:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:43:55,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:43:55,616 INFO L87 Difference]: Start difference. First operand 604 states and 905 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:43:59,290 INFO L93 Difference]: Finished difference Result 630 states and 930 transitions. [2022-02-15 01:43:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:43:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:43:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:43:59,291 INFO L225 Difference]: With dead ends: 630 [2022-02-15 01:43:59,292 INFO L226 Difference]: Without dead ends: 623 [2022-02-15 01:43:59,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7908 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=652, Invalid=20810, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:43:59,293 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 85 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 5616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:43:59,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 225 Invalid, 5616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 5475 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:43:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-15 01:43:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 604. [2022-02-15 01:43:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 596 states have (on average 1.50503355704698) internal successors, (897), 598 states have internal predecessors, (897), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:43:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 904 transitions. [2022-02-15 01:43:59,493 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 904 transitions. Word has length 83 [2022-02-15 01:43:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:43:59,493 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 904 transitions. [2022-02-15 01:43:59,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:43:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 904 transitions. [2022-02-15 01:43:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:43:59,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:43:59,494 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:43:59,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-02-15 01:43:59,494 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:43:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:43:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash 481441050, now seen corresponding path program 165 times [2022-02-15 01:43:59,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:43:59,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122584925] [2022-02-15 01:43:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:43:59,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:59,598 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:43:59,598 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:59,598 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:59,598 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:59,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:43:59,599 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:43:59,599 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:43:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:43:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:59,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:43:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:43:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:01,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:01,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122584925] [2022-02-15 01:44:01,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122584925] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:01,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:01,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-15 01:44:01,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212749444] [2022-02-15 01:44:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:01,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-15 01:44:01,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-15 01:44:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5778, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:44:01,262 INFO L87 Difference]: Start difference. First operand 604 states and 904 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:06,120 INFO L93 Difference]: Finished difference Result 745 states and 1113 transitions. [2022-02-15 01:44:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 01:44:06,120 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:44:06,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:06,122 INFO L225 Difference]: With dead ends: 745 [2022-02-15 01:44:06,122 INFO L226 Difference]: Without dead ends: 715 [2022-02-15 01:44:06,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8607 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=677, Invalid=22579, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 01:44:06,124 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 86 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 8847 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 9064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 8847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:06,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 284 Invalid, 9064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 8847 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 01:44:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-02-15 01:44:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 673. [2022-02-15 01:44:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 665 states have (on average 1.5203007518796992) internal successors, (1011), 667 states have internal predecessors, (1011), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1018 transitions. [2022-02-15 01:44:06,355 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1018 transitions. Word has length 83 [2022-02-15 01:44:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:06,355 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 1018 transitions. [2022-02-15 01:44:06,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1018 transitions. [2022-02-15 01:44:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:44:06,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:06,356 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:06,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-02-15 01:44:06,356 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:06,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2038518884, now seen corresponding path program 166 times [2022-02-15 01:44:06,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:06,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651708172] [2022-02-15 01:44:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:06,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:06,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:06,437 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:06,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:06,438 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:06,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:06,438 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:06,438 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:06,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:06,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:08,200 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:08,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651708172] [2022-02-15 01:44:08,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [651708172] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:08,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:08,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-15 01:44:08,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684581243] [2022-02-15 01:44:08,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:08,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-15 01:44:08,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:08,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-15 01:44:08,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=6085, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:44:08,202 INFO L87 Difference]: Start difference. First operand 673 states and 1018 transitions. Second operand has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:12,652 INFO L93 Difference]: Finished difference Result 706 states and 1053 transitions. [2022-02-15 01:44:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 01:44:12,659 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:44:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:12,661 INFO L225 Difference]: With dead ends: 706 [2022-02-15 01:44:12,661 INFO L226 Difference]: Without dead ends: 698 [2022-02-15 01:44:12,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9317 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=699, Invalid=23793, Unknown=0, NotChecked=0, Total=24492 [2022-02-15 01:44:12,663 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 99 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 7498 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 7663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 7498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:12,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 278 Invalid, 7663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 7498 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 01:44:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-15 01:44:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 675. [2022-02-15 01:44:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5187406296851573) internal successors, (1013), 669 states have internal predecessors, (1013), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1020 transitions. [2022-02-15 01:44:12,956 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1020 transitions. Word has length 83 [2022-02-15 01:44:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:12,956 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1020 transitions. [2022-02-15 01:44:12,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1020 transitions. [2022-02-15 01:44:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:12,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:12,957 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:12,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-02-15 01:44:12,957 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash -111350810, now seen corresponding path program 167 times [2022-02-15 01:44:12,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:12,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304820396] [2022-02-15 01:44:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:12,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:13,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:13,078 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:13,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:13,079 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:13,079 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:13,079 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:13,079 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:13,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:13,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:13,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:13,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304820396] [2022-02-15 01:44:13,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304820396] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:13,953 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:13,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:44:13,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994196655] [2022-02-15 01:44:13,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:13,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:44:13,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:44:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:44:13,954 INFO L87 Difference]: Start difference. First operand 675 states and 1020 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:15,589 INFO L93 Difference]: Finished difference Result 683 states and 1027 transitions. [2022-02-15 01:44:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:44:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:15,591 INFO L225 Difference]: With dead ends: 683 [2022-02-15 01:44:15,591 INFO L226 Difference]: Without dead ends: 676 [2022-02-15 01:44:15,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:44:15,592 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:15,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 151 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:44:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-15 01:44:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 675. [2022-02-15 01:44:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5172413793103448) internal successors, (1012), 669 states have internal predecessors, (1012), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1019 transitions. [2022-02-15 01:44:15,892 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1019 transitions. Word has length 86 [2022-02-15 01:44:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:15,892 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1019 transitions. [2022-02-15 01:44:15,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1019 transitions. [2022-02-15 01:44:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:15,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:15,893 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:15,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-02-15 01:44:15,893 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:15,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2142689630, now seen corresponding path program 168 times [2022-02-15 01:44:15,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:15,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599749810] [2022-02-15 01:44:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:15,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:15,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:15,990 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:15,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:15,991 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:15,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:15,991 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:15,991 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:15,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:16,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:16,947 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:16,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599749810] [2022-02-15 01:44:16,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1599749810] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:16,948 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:16,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:44:16,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601942131] [2022-02-15 01:44:16,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:16,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:44:16,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:16,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:44:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:44:16,949 INFO L87 Difference]: Start difference. First operand 675 states and 1019 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:18,725 INFO L93 Difference]: Finished difference Result 685 states and 1028 transitions. [2022-02-15 01:44:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:44:18,726 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:18,727 INFO L225 Difference]: With dead ends: 685 [2022-02-15 01:44:18,727 INFO L226 Difference]: Without dead ends: 678 [2022-02-15 01:44:18,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3634 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:44:18,728 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:18,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 183 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:44:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-02-15 01:44:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 675. [2022-02-15 01:44:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5157421289355322) internal successors, (1011), 669 states have internal predecessors, (1011), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1018 transitions. [2022-02-15 01:44:18,965 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1018 transitions. Word has length 86 [2022-02-15 01:44:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:18,966 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1018 transitions. [2022-02-15 01:44:18,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1018 transitions. [2022-02-15 01:44:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:18,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:18,966 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:18,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-02-15 01:44:18,967 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 760825190, now seen corresponding path program 169 times [2022-02-15 01:44:18,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:18,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390831481] [2022-02-15 01:44:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:19,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:19,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:19,077 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:19,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:19,077 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:19,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:19,078 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:19,078 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:19,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:19,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:20,039 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:20,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390831481] [2022-02-15 01:44:20,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [390831481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:20,039 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:20,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:44:20,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115136516] [2022-02-15 01:44:20,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:20,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:44:20,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:44:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:44:20,040 INFO L87 Difference]: Start difference. First operand 675 states and 1018 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:22,015 INFO L93 Difference]: Finished difference Result 687 states and 1029 transitions. [2022-02-15 01:44:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:44:22,016 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:22,016 INFO L225 Difference]: With dead ends: 687 [2022-02-15 01:44:22,016 INFO L226 Difference]: Without dead ends: 680 [2022-02-15 01:44:22,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3885 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:44:22,017 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2726 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:22,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 180 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2726 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:44:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-02-15 01:44:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 675. [2022-02-15 01:44:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5142428785607196) internal successors, (1010), 669 states have internal predecessors, (1010), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1017 transitions. [2022-02-15 01:44:22,271 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1017 transitions. Word has length 86 [2022-02-15 01:44:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:22,271 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1017 transitions. [2022-02-15 01:44:22,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1017 transitions. [2022-02-15 01:44:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:22,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:22,272 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:22,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-02-15 01:44:22,272 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2110209314, now seen corresponding path program 170 times [2022-02-15 01:44:22,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:22,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280682927] [2022-02-15 01:44:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:22,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:22,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:22,370 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:22,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:22,370 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:22,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:22,370 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:22,370 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:22,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:23,432 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:23,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280682927] [2022-02-15 01:44:23,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [280682927] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:23,432 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:23,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:44:23,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911850945] [2022-02-15 01:44:23,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:23,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:44:23,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:44:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:44:23,433 INFO L87 Difference]: Start difference. First operand 675 states and 1017 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:25,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:25,558 INFO L93 Difference]: Finished difference Result 689 states and 1030 transitions. [2022-02-15 01:44:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:44:25,558 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:25,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:25,559 INFO L225 Difference]: With dead ends: 689 [2022-02-15 01:44:25,559 INFO L226 Difference]: Without dead ends: 682 [2022-02-15 01:44:25,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4501 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:44:25,560 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3086 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:25,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 187 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3086 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:44:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-15 01:44:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 675. [2022-02-15 01:44:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.512743628185907) internal successors, (1009), 669 states have internal predecessors, (1009), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1016 transitions. [2022-02-15 01:44:25,805 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1016 transitions. Word has length 86 [2022-02-15 01:44:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:25,806 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1016 transitions. [2022-02-15 01:44:25,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1016 transitions. [2022-02-15 01:44:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:25,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:25,806 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:25,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2022-02-15 01:44:25,806 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:25,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:25,807 INFO L85 PathProgramCache]: Analyzing trace with hash -973685018, now seen corresponding path program 171 times [2022-02-15 01:44:25,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:25,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265626912] [2022-02-15 01:44:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:25,837 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:25,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:25,912 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:25,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:25,912 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:25,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:25,913 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:25,913 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:25,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:25,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:27,041 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:27,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265626912] [2022-02-15 01:44:27,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [265626912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:27,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:27,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:44:27,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405824101] [2022-02-15 01:44:27,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:27,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:44:27,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:27,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:44:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:44:27,043 INFO L87 Difference]: Start difference. First operand 675 states and 1016 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:29,480 INFO L93 Difference]: Finished difference Result 691 states and 1031 transitions. [2022-02-15 01:44:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:44:29,481 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:29,482 INFO L225 Difference]: With dead ends: 691 [2022-02-15 01:44:29,482 INFO L226 Difference]: Without dead ends: 684 [2022-02-15 01:44:29,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5038 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:44:29,483 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:29,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 194 Invalid, 3565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:44:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-15 01:44:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 675. [2022-02-15 01:44:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5112443778110944) internal successors, (1008), 669 states have internal predecessors, (1008), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1015 transitions. [2022-02-15 01:44:29,748 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1015 transitions. Word has length 86 [2022-02-15 01:44:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:29,749 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1015 transitions. [2022-02-15 01:44:29,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1015 transitions. [2022-02-15 01:44:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:29,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:29,749 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:29,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-02-15 01:44:29,749 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1623706718, now seen corresponding path program 172 times [2022-02-15 01:44:29,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:29,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651472276] [2022-02-15 01:44:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:29,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:29,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:29,856 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:29,856 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:29,856 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:29,856 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:29,856 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:29,856 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:29,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:29,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:31,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:31,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651472276] [2022-02-15 01:44:31,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1651472276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:31,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:31,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:44:31,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004038742] [2022-02-15 01:44:31,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:31,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:44:31,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:44:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:44:31,011 INFO L87 Difference]: Start difference. First operand 675 states and 1015 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:33,857 INFO L93 Difference]: Finished difference Result 693 states and 1032 transitions. [2022-02-15 01:44:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:44:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:33,859 INFO L225 Difference]: With dead ends: 693 [2022-02-15 01:44:33,859 INFO L226 Difference]: Without dead ends: 686 [2022-02-15 01:44:33,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5516 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:44:33,860 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4144 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:33,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 216 Invalid, 4260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4144 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:44:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-02-15 01:44:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 675. [2022-02-15 01:44:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5097451274362819) internal successors, (1007), 669 states have internal predecessors, (1007), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1014 transitions. [2022-02-15 01:44:34,093 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1014 transitions. Word has length 86 [2022-02-15 01:44:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:34,093 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1014 transitions. [2022-02-15 01:44:34,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1014 transitions. [2022-02-15 01:44:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:34,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:34,094 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:34,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-02-15 01:44:34,094 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:34,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1702012826, now seen corresponding path program 173 times [2022-02-15 01:44:34,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:34,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936987187] [2022-02-15 01:44:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:34,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:34,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:34,207 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:34,207 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:34,207 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:34,207 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:34,207 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:34,207 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:34,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:34,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:35,508 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:35,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936987187] [2022-02-15 01:44:35,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936987187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:35,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:35,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:44:35,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619048423] [2022-02-15 01:44:35,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:35,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:44:35,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:35,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:44:35,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:44:35,510 INFO L87 Difference]: Start difference. First operand 675 states and 1014 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:38,605 INFO L93 Difference]: Finished difference Result 695 states and 1033 transitions. [2022-02-15 01:44:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:44:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:38,607 INFO L225 Difference]: With dead ends: 695 [2022-02-15 01:44:38,607 INFO L226 Difference]: Without dead ends: 688 [2022-02-15 01:44:38,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6101 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:44:38,608 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 4921 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 5044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:38,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 238 Invalid, 5044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4921 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:44:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-02-15 01:44:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 675. [2022-02-15 01:44:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5082458770614693) internal successors, (1006), 669 states have internal predecessors, (1006), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1013 transitions. [2022-02-15 01:44:38,841 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1013 transitions. Word has length 86 [2022-02-15 01:44:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:38,841 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1013 transitions. [2022-02-15 01:44:38,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1013 transitions. [2022-02-15 01:44:38,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:38,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:38,842 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:38,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2022-02-15 01:44:38,842 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:38,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:38,843 INFO L85 PathProgramCache]: Analyzing trace with hash 205785634, now seen corresponding path program 174 times [2022-02-15 01:44:38,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:38,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216028765] [2022-02-15 01:44:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:38,881 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:38,950 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:38,951 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:38,951 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:38,951 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:38,951 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:38,951 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:38,951 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:38,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:38,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:40,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:40,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216028765] [2022-02-15 01:44:40,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216028765] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:40,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:40,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:44:40,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582324700] [2022-02-15 01:44:40,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:40,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:44:40,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:44:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:44:40,396 INFO L87 Difference]: Start difference. First operand 675 states and 1013 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:43,752 INFO L93 Difference]: Finished difference Result 697 states and 1034 transitions. [2022-02-15 01:44:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:44:43,752 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:43,753 INFO L225 Difference]: With dead ends: 697 [2022-02-15 01:44:43,753 INFO L226 Difference]: Without dead ends: 690 [2022-02-15 01:44:43,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6733 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=600, Invalid=17490, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:44:43,755 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 5380 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 5508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 5380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:43,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 245 Invalid, 5508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 5380 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:44:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-15 01:44:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 675. [2022-02-15 01:44:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5067466266866567) internal successors, (1005), 669 states have internal predecessors, (1005), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1012 transitions. [2022-02-15 01:44:43,995 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1012 transitions. Word has length 86 [2022-02-15 01:44:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:43,995 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1012 transitions. [2022-02-15 01:44:43,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1012 transitions. [2022-02-15 01:44:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:43,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:43,996 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:43,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2022-02-15 01:44:43,996 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash -462089754, now seen corresponding path program 175 times [2022-02-15 01:44:43,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:43,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803801850] [2022-02-15 01:44:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:44,035 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:44,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:44,106 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:44,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:44,107 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:44,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:44,107 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:44,107 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:44,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:44,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:45,623 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:45,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803801850] [2022-02-15 01:44:45,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803801850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:45,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:45,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:44:45,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630768582] [2022-02-15 01:44:45,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:45,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:44:45,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:44:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:44:45,624 INFO L87 Difference]: Start difference. First operand 675 states and 1012 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:49,117 INFO L93 Difference]: Finished difference Result 699 states and 1035 transitions. [2022-02-15 01:44:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:44:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:49,118 INFO L225 Difference]: With dead ends: 699 [2022-02-15 01:44:49,118 INFO L226 Difference]: Without dead ends: 692 [2022-02-15 01:44:49,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7368 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:44:49,120 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 5730 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 5864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 5730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:49,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 247 Invalid, 5864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 5730 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:44:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-02-15 01:44:49,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 675. [2022-02-15 01:44:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5052473763118441) internal successors, (1004), 669 states have internal predecessors, (1004), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1011 transitions. [2022-02-15 01:44:49,344 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1011 transitions. Word has length 86 [2022-02-15 01:44:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:49,345 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1011 transitions. [2022-02-15 01:44:49,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:49,345 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1011 transitions. [2022-02-15 01:44:49,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:49,345 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:49,345 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:49,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-02-15 01:44:49,345 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash -896352094, now seen corresponding path program 176 times [2022-02-15 01:44:49,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:49,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875700772] [2022-02-15 01:44:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:49,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:49,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:49,441 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:49,441 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:49,441 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:49,441 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:49,441 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:49,441 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:49,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:49,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:51,026 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:51,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875700772] [2022-02-15 01:44:51,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875700772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:51,026 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:51,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:44:51,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223058132] [2022-02-15 01:44:51,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:51,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:44:51,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:44:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:44:51,028 INFO L87 Difference]: Start difference. First operand 675 states and 1011 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:44:54,815 INFO L93 Difference]: Finished difference Result 701 states and 1036 transitions. [2022-02-15 01:44:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:44:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:44:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:44:54,817 INFO L225 Difference]: With dead ends: 701 [2022-02-15 01:44:54,817 INFO L226 Difference]: Without dead ends: 694 [2022-02-15 01:44:54,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8054 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=654, Invalid=20808, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:44:54,818 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 80 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5953 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 6093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 5953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:44:54,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 244 Invalid, 6093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 5953 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:44:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-02-15 01:44:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 675. [2022-02-15 01:44:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.5037481259370316) internal successors, (1003), 669 states have internal predecessors, (1003), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:44:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1010 transitions. [2022-02-15 01:44:55,086 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1010 transitions. Word has length 86 [2022-02-15 01:44:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:44:55,087 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1010 transitions. [2022-02-15 01:44:55,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:44:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1010 transitions. [2022-02-15 01:44:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:44:55,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:44:55,087 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:44:55,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-02-15 01:44:55,087 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:44:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:44:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1090131098, now seen corresponding path program 177 times [2022-02-15 01:44:55,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:44:55,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614014637] [2022-02-15 01:44:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:44:55,127 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:55,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:44:55,175 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:55,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:55,175 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:55,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:44:55,175 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:44:55,175 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:44:55,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:44:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:44:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:44:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:44:56,800 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:44:56,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614014637] [2022-02-15 01:44:56,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [614014637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:44:56,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:44:56,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-15 01:44:56,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372719649] [2022-02-15 01:44:56,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:44:56,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-15 01:44:56,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:44:56,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-15 01:44:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:44:56,802 INFO L87 Difference]: Start difference. First operand 675 states and 1010 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:00,718 INFO L93 Difference]: Finished difference Result 702 states and 1036 transitions. [2022-02-15 01:45:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 01:45:00,718 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:45:00,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:00,719 INFO L225 Difference]: With dead ends: 702 [2022-02-15 01:45:00,720 INFO L226 Difference]: Without dead ends: 695 [2022-02-15 01:45:00,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8740 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=681, Invalid=22575, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 01:45:00,721 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 86 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6146 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 6293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 6146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:00,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 241 Invalid, 6293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 6146 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:45:00,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-02-15 01:45:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 675. [2022-02-15 01:45:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 667 states have (on average 1.502248875562219) internal successors, (1002), 669 states have internal predecessors, (1002), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1009 transitions. [2022-02-15 01:45:00,961 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1009 transitions. Word has length 86 [2022-02-15 01:45:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:00,961 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1009 transitions. [2022-02-15 01:45:00,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1009 transitions. [2022-02-15 01:45:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:45:00,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:00,962 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:00,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2022-02-15 01:45:00,962 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:00,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1036801826, now seen corresponding path program 178 times [2022-02-15 01:45:00,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:00,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176187673] [2022-02-15 01:45:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:01,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:01,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:01,073 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:01,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:01,073 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:01,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:01,074 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:01,074 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:01,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:01,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:01,128 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 01:45:02,837 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:02,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176187673] [2022-02-15 01:45:02,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176187673] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:02,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:02,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 01:45:02,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799939078] [2022-02-15 01:45:02,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:02,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 01:45:02,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:02,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 01:45:02,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=6242, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:45:02,838 INFO L87 Difference]: Start difference. First operand 675 states and 1009 transitions. Second operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:08,497 INFO L93 Difference]: Finished difference Result 822 states and 1227 transitions. [2022-02-15 01:45:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 01:45:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:45:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:08,499 INFO L225 Difference]: With dead ends: 822 [2022-02-15 01:45:08,499 INFO L226 Difference]: Without dead ends: 791 [2022-02-15 01:45:08,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9475 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=706, Invalid=24416, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 01:45:08,501 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 86 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 10810 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 11037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 10810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:08,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 326 Invalid, 11037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 10810 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-15 01:45:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-15 01:45:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 747. [2022-02-15 01:45:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 739 states have (on average 1.516914749661705) internal successors, (1121), 741 states have internal predecessors, (1121), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1128 transitions. [2022-02-15 01:45:08,776 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1128 transitions. Word has length 86 [2022-02-15 01:45:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:08,776 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1128 transitions. [2022-02-15 01:45:08,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1128 transitions. [2022-02-15 01:45:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:45:08,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:08,777 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:08,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-02-15 01:45:08,777 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:08,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1483158108, now seen corresponding path program 179 times [2022-02-15 01:45:08,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:08,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291978355] [2022-02-15 01:45:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:08,814 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:08,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:08,891 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:08,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:08,892 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:08,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:08,892 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:08,892 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:08,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:10,753 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:10,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291978355] [2022-02-15 01:45:10,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [291978355] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:10,754 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:10,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-15 01:45:10,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549333138] [2022-02-15 01:45:10,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:10,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-15 01:45:10,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-15 01:45:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:45:10,755 INFO L87 Difference]: Start difference. First operand 747 states and 1128 transitions. Second operand has 82 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 80 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:15,473 INFO L93 Difference]: Finished difference Result 781 states and 1164 transitions. [2022-02-15 01:45:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 01:45:15,473 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 80 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:45:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:15,474 INFO L225 Difference]: With dead ends: 781 [2022-02-15 01:45:15,474 INFO L226 Difference]: Without dead ends: 773 [2022-02-15 01:45:15,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9938 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=724, Invalid=25682, Unknown=0, NotChecked=0, Total=26406 [2022-02-15 01:45:15,476 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 104 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 7476 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 7648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 7476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:15,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 269 Invalid, 7648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 7476 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 01:45:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-02-15 01:45:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 749. [2022-02-15 01:45:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 741 states have (on average 1.515519568151147) internal successors, (1123), 743 states have internal predecessors, (1123), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1130 transitions. [2022-02-15 01:45:15,728 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1130 transitions. Word has length 86 [2022-02-15 01:45:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:15,728 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1130 transitions. [2022-02-15 01:45:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 80 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1130 transitions. [2022-02-15 01:45:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:15,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:15,729 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:15,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-02-15 01:45:15,729 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:15,729 INFO L85 PathProgramCache]: Analyzing trace with hash -46911206, now seen corresponding path program 180 times [2022-02-15 01:45:15,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:15,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963939312] [2022-02-15 01:45:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:15,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:15,814 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:15,814 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:15,814 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:15,814 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:15,815 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:15,815 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:15,815 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:15,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:16,657 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:16,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963939312] [2022-02-15 01:45:16,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1963939312] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:16,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:16,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:45:16,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864857262] [2022-02-15 01:45:16,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:16,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:45:16,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:45:16,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:45:16,658 INFO L87 Difference]: Start difference. First operand 749 states and 1130 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:18,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:18,264 INFO L93 Difference]: Finished difference Result 756 states and 1136 transitions. [2022-02-15 01:45:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:45:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:18,265 INFO L225 Difference]: With dead ends: 756 [2022-02-15 01:45:18,265 INFO L226 Difference]: Without dead ends: 749 [2022-02-15 01:45:18,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:45:18,266 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:18,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 150 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:45:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-02-15 01:45:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 711. [2022-02-15 01:45:18,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5248933143669985) internal successors, (1072), 705 states have internal predecessors, (1072), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1079 transitions. [2022-02-15 01:45:18,533 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1079 transitions. Word has length 89 [2022-02-15 01:45:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:18,533 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1079 transitions. [2022-02-15 01:45:18,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1079 transitions. [2022-02-15 01:45:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:18,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:18,534 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:18,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2022-02-15 01:45:18,534 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash 427502814, now seen corresponding path program 181 times [2022-02-15 01:45:18,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:18,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314346814] [2022-02-15 01:45:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:18,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:18,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:18,619 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:18,620 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:18,620 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:18,620 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:18,620 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:18,620 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:18,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:19,606 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:19,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314346814] [2022-02-15 01:45:19,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314346814] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:19,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:19,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:45:19,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610188210] [2022-02-15 01:45:19,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:19,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:45:19,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:19,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:45:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:45:19,608 INFO L87 Difference]: Start difference. First operand 711 states and 1079 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:21,409 INFO L93 Difference]: Finished difference Result 720 states and 1087 transitions. [2022-02-15 01:45:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:45:21,410 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:21,411 INFO L225 Difference]: With dead ends: 720 [2022-02-15 01:45:21,411 INFO L226 Difference]: Without dead ends: 713 [2022-02-15 01:45:21,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 31 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3535 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:45:21,412 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:21,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 162 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:45:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-02-15 01:45:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 711. [2022-02-15 01:45:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.523470839260313) internal successors, (1071), 705 states have internal predecessors, (1071), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1078 transitions. [2022-02-15 01:45:21,689 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1078 transitions. Word has length 89 [2022-02-15 01:45:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:21,689 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1078 transitions. [2022-02-15 01:45:21,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1078 transitions. [2022-02-15 01:45:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:21,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:21,690 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:21,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2022-02-15 01:45:21,690 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:21,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1603836006, now seen corresponding path program 182 times [2022-02-15 01:45:21,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:21,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086000824] [2022-02-15 01:45:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:21,736 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:21,794 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:21,794 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:21,794 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:21,794 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:21,795 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:21,795 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:21,795 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:21,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:21,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:22,789 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:22,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086000824] [2022-02-15 01:45:22,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086000824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:22,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:22,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:45:22,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503846326] [2022-02-15 01:45:22,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:22,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:45:22,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:22,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:45:22,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:45:22,791 INFO L87 Difference]: Start difference. First operand 711 states and 1078 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:24,732 INFO L93 Difference]: Finished difference Result 722 states and 1088 transitions. [2022-02-15 01:45:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:45:24,733 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:24,734 INFO L225 Difference]: With dead ends: 722 [2022-02-15 01:45:24,734 INFO L226 Difference]: Without dead ends: 715 [2022-02-15 01:45:24,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:45:24,735 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:24,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 164 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:45:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-02-15 01:45:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 711. [2022-02-15 01:45:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5220483641536273) internal successors, (1070), 705 states have internal predecessors, (1070), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1077 transitions. [2022-02-15 01:45:25,111 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1077 transitions. Word has length 89 [2022-02-15 01:45:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:25,111 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1077 transitions. [2022-02-15 01:45:25,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1077 transitions. [2022-02-15 01:45:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:25,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:25,112 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:25,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-02-15 01:45:25,112 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:25,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1299678814, now seen corresponding path program 183 times [2022-02-15 01:45:25,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:25,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062606740] [2022-02-15 01:45:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:25,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:25,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:25,231 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:25,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:25,231 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:25,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:25,231 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:25,231 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:25,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:25,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:26,288 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:26,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062606740] [2022-02-15 01:45:26,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1062606740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:26,288 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:26,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:45:26,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271711611] [2022-02-15 01:45:26,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:26,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:45:26,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:45:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:45:26,289 INFO L87 Difference]: Start difference. First operand 711 states and 1077 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:28,619 INFO L93 Difference]: Finished difference Result 724 states and 1089 transitions. [2022-02-15 01:45:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:45:28,620 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:28,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:28,621 INFO L225 Difference]: With dead ends: 724 [2022-02-15 01:45:28,621 INFO L226 Difference]: Without dead ends: 717 [2022-02-15 01:45:28,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4446 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:45:28,622 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:28,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 186 Invalid, 3112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:45:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-15 01:45:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 711. [2022-02-15 01:45:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5206258890469417) internal successors, (1069), 705 states have internal predecessors, (1069), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1076 transitions. [2022-02-15 01:45:28,919 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1076 transitions. Word has length 89 [2022-02-15 01:45:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:28,920 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1076 transitions. [2022-02-15 01:45:28,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1076 transitions. [2022-02-15 01:45:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:28,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:28,920 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:28,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-02-15 01:45:28,920 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1645904358, now seen corresponding path program 184 times [2022-02-15 01:45:28,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:28,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760531862] [2022-02-15 01:45:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:28,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:29,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:29,001 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:29,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:29,001 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:29,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:29,001 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:29,001 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:29,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:29,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:30,166 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:30,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760531862] [2022-02-15 01:45:30,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760531862] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:30,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:30,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:45:30,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617241805] [2022-02-15 01:45:30,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:30,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:45:30,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:45:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:45:30,167 INFO L87 Difference]: Start difference. First operand 711 states and 1076 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:32,732 INFO L93 Difference]: Finished difference Result 726 states and 1090 transitions. [2022-02-15 01:45:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:45:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:32,734 INFO L225 Difference]: With dead ends: 726 [2022-02-15 01:45:32,734 INFO L226 Difference]: Without dead ends: 719 [2022-02-15 01:45:32,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5005 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:45:32,735 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3383 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:32,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 193 Invalid, 3493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3383 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:45:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-02-15 01:45:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 711. [2022-02-15 01:45:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5192034139402562) internal successors, (1068), 705 states have internal predecessors, (1068), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1075 transitions. [2022-02-15 01:45:33,083 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1075 transitions. Word has length 89 [2022-02-15 01:45:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:33,083 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1075 transitions. [2022-02-15 01:45:33,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1075 transitions. [2022-02-15 01:45:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:33,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:33,084 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:33,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2022-02-15 01:45:33,084 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:33,084 INFO L85 PathProgramCache]: Analyzing trace with hash -434831394, now seen corresponding path program 185 times [2022-02-15 01:45:33,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:33,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271712594] [2022-02-15 01:45:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:33,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:33,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:33,174 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:33,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:33,174 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:33,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:33,174 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:33,174 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:33,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:33,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:34,425 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:34,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271712594] [2022-02-15 01:45:34,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271712594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:34,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:34,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:45:34,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972893206] [2022-02-15 01:45:34,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:34,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:45:34,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:45:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:45:34,426 INFO L87 Difference]: Start difference. First operand 711 states and 1075 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:37,266 INFO L93 Difference]: Finished difference Result 728 states and 1091 transitions. [2022-02-15 01:45:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:45:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:37,268 INFO L225 Difference]: With dead ends: 728 [2022-02-15 01:45:37,268 INFO L226 Difference]: Without dead ends: 721 [2022-02-15 01:45:37,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5439 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=544, Invalid=14462, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:45:37,269 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 67 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3869 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 3986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:37,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 205 Invalid, 3986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3869 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:45:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-02-15 01:45:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 711. [2022-02-15 01:45:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5177809388335703) internal successors, (1067), 705 states have internal predecessors, (1067), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1074 transitions. [2022-02-15 01:45:37,641 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1074 transitions. Word has length 89 [2022-02-15 01:45:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:37,642 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1074 transitions. [2022-02-15 01:45:37,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1074 transitions. [2022-02-15 01:45:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:37,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:37,642 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:37,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2022-02-15 01:45:37,642 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1084853094, now seen corresponding path program 186 times [2022-02-15 01:45:37,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:37,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914339310] [2022-02-15 01:45:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:37,671 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:37,731 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:37,731 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:37,731 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:37,731 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:37,732 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:37,732 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:37,732 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:37,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:37,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:39,059 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:39,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914339310] [2022-02-15 01:45:39,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [914339310] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:39,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:39,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:45:39,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903383745] [2022-02-15 01:45:39,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:39,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:45:39,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:45:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:45:39,061 INFO L87 Difference]: Start difference. First operand 711 states and 1074 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:42,194 INFO L93 Difference]: Finished difference Result 730 states and 1092 transitions. [2022-02-15 01:45:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:45:42,195 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:42,196 INFO L225 Difference]: With dead ends: 730 [2022-02-15 01:45:42,196 INFO L226 Difference]: Without dead ends: 723 [2022-02-15 01:45:42,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6128 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:45:42,197 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4386 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 4509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:42,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 217 Invalid, 4509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4386 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:45:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-02-15 01:45:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 711. [2022-02-15 01:45:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5163584637268848) internal successors, (1066), 705 states have internal predecessors, (1066), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1073 transitions. [2022-02-15 01:45:42,480 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1073 transitions. Word has length 89 [2022-02-15 01:45:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:42,480 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1073 transitions. [2022-02-15 01:45:42,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1073 transitions. [2022-02-15 01:45:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:42,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:42,481 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:42,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2022-02-15 01:45:42,481 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1163159202, now seen corresponding path program 187 times [2022-02-15 01:45:42,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:42,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31203511] [2022-02-15 01:45:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:42,510 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:42,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:42,566 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:42,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:42,567 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:42,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:42,567 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:42,567 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:42,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:42,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:44,065 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:44,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31203511] [2022-02-15 01:45:44,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [31203511] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:44,065 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:44,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:45:44,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885798804] [2022-02-15 01:45:44,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:44,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:45:44,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:44,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:45:44,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:45:44,066 INFO L87 Difference]: Start difference. First operand 711 states and 1073 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:47,582 INFO L93 Difference]: Finished difference Result 732 states and 1093 transitions. [2022-02-15 01:45:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:45:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:47,584 INFO L225 Difference]: With dead ends: 732 [2022-02-15 01:45:47,584 INFO L226 Difference]: Without dead ends: 725 [2022-02-15 01:45:47,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=600, Invalid=17490, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:45:47,585 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 5295 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 5295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:47,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 244 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 5295 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:45:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-02-15 01:45:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 711. [2022-02-15 01:45:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5149359886201992) internal successors, (1065), 705 states have internal predecessors, (1065), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1072 transitions. [2022-02-15 01:45:47,955 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1072 transitions. Word has length 89 [2022-02-15 01:45:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:47,955 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1072 transitions. [2022-02-15 01:45:47,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1072 transitions. [2022-02-15 01:45:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:47,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:47,956 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:47,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2022-02-15 01:45:47,956 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:47,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:47,956 INFO L85 PathProgramCache]: Analyzing trace with hash 744639258, now seen corresponding path program 188 times [2022-02-15 01:45:47,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:47,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659033698] [2022-02-15 01:45:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:47,985 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:48,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:48,058 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:48,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:48,059 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:48,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:48,059 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:48,059 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:48,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:48,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:49,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:49,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659033698] [2022-02-15 01:45:49,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [659033698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:49,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:49,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:45:49,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121974] [2022-02-15 01:45:49,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:49,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:45:49,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:45:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:45:49,587 INFO L87 Difference]: Start difference. First operand 711 states and 1072 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:53,093 INFO L93 Difference]: Finished difference Result 734 states and 1094 transitions. [2022-02-15 01:45:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:45:53,093 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:53,095 INFO L225 Difference]: With dead ends: 734 [2022-02-15 01:45:53,095 INFO L226 Difference]: Without dead ends: 727 [2022-02-15 01:45:53,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:45:53,096 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4877 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 5011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:53,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 216 Invalid, 5011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4877 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:45:53,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-02-15 01:45:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 711. [2022-02-15 01:45:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5135135135135136) internal successors, (1064), 705 states have internal predecessors, (1064), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1071 transitions. [2022-02-15 01:45:53,348 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1071 transitions. Word has length 89 [2022-02-15 01:45:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:53,348 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1071 transitions. [2022-02-15 01:45:53,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1071 transitions. [2022-02-15 01:45:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:53,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:53,349 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:53,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-02-15 01:45:53,350 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash 76763870, now seen corresponding path program 189 times [2022-02-15 01:45:53,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:53,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310020506] [2022-02-15 01:45:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:53,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:53,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:53,436 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:53,436 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:53,436 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:53,436 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:53,436 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:53,436 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:53,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:53,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:45:55,167 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:45:55,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310020506] [2022-02-15 01:45:55,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310020506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:45:55,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:45:55,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:45:55,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279277812] [2022-02-15 01:45:55,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:45:55,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:45:55,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:45:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:45:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:45:55,169 INFO L87 Difference]: Start difference. First operand 711 states and 1071 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:45:59,503 INFO L93 Difference]: Finished difference Result 736 states and 1095 transitions. [2022-02-15 01:45:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:45:59,504 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:45:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:45:59,505 INFO L225 Difference]: With dead ends: 736 [2022-02-15 01:45:59,506 INFO L226 Difference]: Without dead ends: 729 [2022-02-15 01:45:59,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7932 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=652, Invalid=20810, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:45:59,507 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 79 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 6813 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 6954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 6813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:45:59,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 278 Invalid, 6954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 6813 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 01:45:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-02-15 01:45:59,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 711. [2022-02-15 01:45:59,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5120910384068278) internal successors, (1063), 705 states have internal predecessors, (1063), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:45:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1070 transitions. [2022-02-15 01:45:59,840 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1070 transitions. Word has length 89 [2022-02-15 01:45:59,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:45:59,840 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1070 transitions. [2022-02-15 01:45:59,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:45:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1070 transitions. [2022-02-15 01:45:59,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:45:59,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:45:59,841 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:45:59,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-02-15 01:45:59,841 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:45:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:45:59,841 INFO L85 PathProgramCache]: Analyzing trace with hash -357498470, now seen corresponding path program 190 times [2022-02-15 01:45:59,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:45:59,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834377986] [2022-02-15 01:45:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:45:59,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:59,933 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:45:59,933 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:59,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:59,934 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:59,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:45:59,934 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:45:59,934 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:45:59,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:45:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:59,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:45:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:45:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:01,700 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:01,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834377986] [2022-02-15 01:46:01,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1834377986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:01,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:01,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-15 01:46:01,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550238141] [2022-02-15 01:46:01,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:01,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-15 01:46:01,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:01,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-15 01:46:01,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:46:01,703 INFO L87 Difference]: Start difference. First operand 711 states and 1070 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:06,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:06,712 INFO L93 Difference]: Finished difference Result 738 states and 1096 transitions. [2022-02-15 01:46:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 01:46:06,713 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:46:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:06,714 INFO L225 Difference]: With dead ends: 738 [2022-02-15 01:46:06,714 INFO L226 Difference]: Without dead ends: 731 [2022-02-15 01:46:06,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8758 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=681, Invalid=22575, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 01:46:06,716 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 77 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 8360 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 8507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 8360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:06,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 320 Invalid, 8507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 8360 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 01:46:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-02-15 01:46:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 711. [2022-02-15 01:46:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5106685633001422) internal successors, (1062), 705 states have internal predecessors, (1062), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1069 transitions. [2022-02-15 01:46:07,007 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1069 transitions. Word has length 89 [2022-02-15 01:46:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:07,007 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1069 transitions. [2022-02-15 01:46:07,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1069 transitions. [2022-02-15 01:46:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:46:07,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:07,008 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:07,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-02-15 01:46:07,008 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:07,008 INFO L85 PathProgramCache]: Analyzing trace with hash -551277474, now seen corresponding path program 191 times [2022-02-15 01:46:07,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:07,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549757847] [2022-02-15 01:46:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:07,047 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:07,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:07,121 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:07,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:07,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:07,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:07,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:07,122 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:07,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:09,077 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:09,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549757847] [2022-02-15 01:46:09,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [549757847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:09,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:09,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 01:46:09,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656125158] [2022-02-15 01:46:09,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:09,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 01:46:09,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:09,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 01:46:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=6242, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:46:09,079 INFO L87 Difference]: Start difference. First operand 711 states and 1069 transitions. Second operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:13,897 INFO L93 Difference]: Finished difference Result 739 states and 1096 transitions. [2022-02-15 01:46:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 01:46:13,897 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:46:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:13,898 INFO L225 Difference]: With dead ends: 739 [2022-02-15 01:46:13,898 INFO L226 Difference]: Without dead ends: 732 [2022-02-15 01:46:13,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9489 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=708, Invalid=24414, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 01:46:13,899 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 7616 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 7769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 7616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:13,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 282 Invalid, 7769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 7616 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 01:46:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-02-15 01:46:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 711. [2022-02-15 01:46:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 703 states have (on average 1.5092460881934566) internal successors, (1061), 705 states have internal predecessors, (1061), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1068 transitions. [2022-02-15 01:46:14,260 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1068 transitions. Word has length 89 [2022-02-15 01:46:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:14,260 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1068 transitions. [2022-02-15 01:46:14,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1068 transitions. [2022-02-15 01:46:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:46:14,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:14,261 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:14,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2022-02-15 01:46:14,261 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:14,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1575655450, now seen corresponding path program 192 times [2022-02-15 01:46:14,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:14,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288742840] [2022-02-15 01:46:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:14,304 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:14,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:14,382 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:14,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:14,382 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:14,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:14,382 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:14,383 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:14,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:14,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:16,390 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:16,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288742840] [2022-02-15 01:46:16,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288742840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:16,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:16,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-15 01:46:16,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646658498] [2022-02-15 01:46:16,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:16,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-15 01:46:16,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-15 01:46:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=6725, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 01:46:16,392 INFO L87 Difference]: Start difference. First operand 711 states and 1068 transitions. Second operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:22,804 INFO L93 Difference]: Finished difference Result 864 states and 1295 transitions. [2022-02-15 01:46:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 01:46:22,805 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:46:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:22,807 INFO L225 Difference]: With dead ends: 864 [2022-02-15 01:46:22,807 INFO L226 Difference]: Without dead ends: 832 [2022-02-15 01:46:22,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10244 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=733, Invalid=26327, Unknown=0, NotChecked=0, Total=27060 [2022-02-15 01:46:22,808 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 84 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 11434 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 11669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 11434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:22,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 333 Invalid, 11669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 11434 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 01:46:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-02-15 01:46:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 786. [2022-02-15 01:46:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 778 states have (on average 1.5231362467866323) internal successors, (1185), 780 states have internal predecessors, (1185), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1192 transitions. [2022-02-15 01:46:23,148 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1192 transitions. Word has length 89 [2022-02-15 01:46:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:23,148 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1192 transitions. [2022-02-15 01:46:23,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1192 transitions. [2022-02-15 01:46:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:46:23,149 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:23,149 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:23,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2022-02-15 01:46:23,149 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash -944304484, now seen corresponding path program 193 times [2022-02-15 01:46:23,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:23,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368373847] [2022-02-15 01:46:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:23,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:23,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:23,267 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:23,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:23,267 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:23,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:23,268 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:23,268 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:23,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:23,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:25,265 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:25,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368373847] [2022-02-15 01:46:25,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368373847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:25,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:25,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-15 01:46:25,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140362541] [2022-02-15 01:46:25,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:25,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-15 01:46:25,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:25,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-15 01:46:25,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=7057, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 01:46:25,267 INFO L87 Difference]: Start difference. First operand 786 states and 1192 transitions. Second operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:30,595 INFO L93 Difference]: Finished difference Result 821 states and 1229 transitions. [2022-02-15 01:46:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-15 01:46:30,595 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:46:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:30,596 INFO L225 Difference]: With dead ends: 821 [2022-02-15 01:46:30,597 INFO L226 Difference]: Without dead ends: 813 [2022-02-15 01:46:30,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10873 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=753, Invalid=27639, Unknown=0, NotChecked=0, Total=28392 [2022-02-15 01:46:30,598 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 105 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 8253 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 8253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:30,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 285 Invalid, 8431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 8253 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 01:46:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-02-15 01:46:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 788. [2022-02-15 01:46:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5217948717948717) internal successors, (1187), 782 states have internal predecessors, (1187), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1194 transitions. [2022-02-15 01:46:30,898 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1194 transitions. Word has length 89 [2022-02-15 01:46:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:30,898 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1194 transitions. [2022-02-15 01:46:30,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1194 transitions. [2022-02-15 01:46:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:46:30,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:30,899 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:30,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2022-02-15 01:46:30,899 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:30,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1646351070, now seen corresponding path program 194 times [2022-02-15 01:46:30,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:30,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564168703] [2022-02-15 01:46:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:30,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:30,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:30,994 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:30,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:30,995 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:30,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:30,995 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:30,995 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:30,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:32,006 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:32,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564168703] [2022-02-15 01:46:32,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [564168703] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:32,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:32,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:46:32,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847529190] [2022-02-15 01:46:32,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:32,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:46:32,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:32,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:46:32,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:46:32,008 INFO L87 Difference]: Start difference. First operand 788 states and 1194 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:34,010 INFO L93 Difference]: Finished difference Result 796 states and 1201 transitions. [2022-02-15 01:46:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:46:34,010 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:46:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:34,011 INFO L225 Difference]: With dead ends: 796 [2022-02-15 01:46:34,011 INFO L226 Difference]: Without dead ends: 789 [2022-02-15 01:46:34,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3530 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:46:34,012 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:34,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 186 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:46:34,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-02-15 01:46:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 788. [2022-02-15 01:46:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5205128205128204) internal successors, (1186), 782 states have internal predecessors, (1186), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1193 transitions. [2022-02-15 01:46:34,407 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1193 transitions. Word has length 92 [2022-02-15 01:46:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:34,407 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1193 transitions. [2022-02-15 01:46:34,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1193 transitions. [2022-02-15 01:46:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:46:34,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:34,408 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:34,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2022-02-15 01:46:34,408 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1171937050, now seen corresponding path program 195 times [2022-02-15 01:46:34,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:34,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921453629] [2022-02-15 01:46:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:34,436 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:34,507 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:34,507 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:34,507 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:34,507 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:34,507 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:34,507 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:34,507 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:34,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:34,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:35,549 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:35,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921453629] [2022-02-15 01:46:35,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [921453629] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:35,550 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:35,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:46:35,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588435796] [2022-02-15 01:46:35,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:35,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:46:35,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:46:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:46:35,551 INFO L87 Difference]: Start difference. First operand 788 states and 1193 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:37,760 INFO L93 Difference]: Finished difference Result 798 states and 1202 transitions. [2022-02-15 01:46:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:46:37,760 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:46:37,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:37,761 INFO L225 Difference]: With dead ends: 798 [2022-02-15 01:46:37,761 INFO L226 Difference]: Without dead ends: 791 [2022-02-15 01:46:37,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:46:37,762 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3069 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 3167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:37,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 208 Invalid, 3167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3069 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:46:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-15 01:46:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 788. [2022-02-15 01:46:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5192307692307692) internal successors, (1185), 782 states have internal predecessors, (1185), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1192 transitions. [2022-02-15 01:46:38,044 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1192 transitions. Word has length 92 [2022-02-15 01:46:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:38,044 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1192 transitions. [2022-02-15 01:46:38,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1192 transitions. [2022-02-15 01:46:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:46:38,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:38,045 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:38,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2022-02-15 01:46:38,045 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1091691426, now seen corresponding path program 196 times [2022-02-15 01:46:38,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:38,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071472443] [2022-02-15 01:46:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:38,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:38,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:38,138 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:38,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:38,138 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:38,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:38,139 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:38,139 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:38,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:38,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:39,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:39,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071472443] [2022-02-15 01:46:39,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071472443] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:39,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:39,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:46:39,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916952443] [2022-02-15 01:46:39,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:39,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:46:39,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:46:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:46:39,308 INFO L87 Difference]: Start difference. First operand 788 states and 1192 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:41,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:41,928 INFO L93 Difference]: Finished difference Result 800 states and 1203 transitions. [2022-02-15 01:46:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:46:41,928 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:46:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:41,929 INFO L225 Difference]: With dead ends: 800 [2022-02-15 01:46:41,929 INFO L226 Difference]: Without dead ends: 793 [2022-02-15 01:46:41,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4446 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=490, Invalid=11720, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:46:41,930 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 3811 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 3915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:41,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 235 Invalid, 3915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3811 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:46:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-02-15 01:46:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 788. [2022-02-15 01:46:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5179487179487179) internal successors, (1184), 782 states have internal predecessors, (1184), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1191 transitions. [2022-02-15 01:46:42,227 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1191 transitions. Word has length 92 [2022-02-15 01:46:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:42,227 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1191 transitions. [2022-02-15 01:46:42,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1191 transitions. [2022-02-15 01:46:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:46:42,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:42,228 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:42,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-02-15 01:46:42,228 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash -299761050, now seen corresponding path program 197 times [2022-02-15 01:46:42,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:42,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627208750] [2022-02-15 01:46:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:42,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:42,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:42,322 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:42,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:42,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:42,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:42,323 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:42,323 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:42,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:42,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:43,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:43,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627208750] [2022-02-15 01:46:43,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627208750] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:43,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:43,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:46:43,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239403975] [2022-02-15 01:46:43,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:43,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:46:43,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:46:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:46:43,452 INFO L87 Difference]: Start difference. First operand 788 states and 1191 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:45,982 INFO L93 Difference]: Finished difference Result 802 states and 1204 transitions. [2022-02-15 01:46:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:46:45,982 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:46:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:45,983 INFO L225 Difference]: With dead ends: 802 [2022-02-15 01:46:45,983 INFO L226 Difference]: Without dead ends: 795 [2022-02-15 01:46:45,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5040 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:46:45,984 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3407 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:45,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 197 Invalid, 3517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3407 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:46:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-15 01:46:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 788. [2022-02-15 01:46:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5166666666666666) internal successors, (1183), 782 states have internal predecessors, (1183), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1190 transitions. [2022-02-15 01:46:46,281 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1190 transitions. Word has length 92 [2022-02-15 01:46:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:46,281 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1190 transitions. [2022-02-15 01:46:46,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1190 transitions. [2022-02-15 01:46:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:46:46,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:46,282 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:46,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-02-15 01:46:46,282 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:46,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1049623074, now seen corresponding path program 198 times [2022-02-15 01:46:46,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:46,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639282169] [2022-02-15 01:46:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:46,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:46,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:46,392 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:46,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:46,392 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:46,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:46,393 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:46,393 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:46,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:46,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:47,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:47,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639282169] [2022-02-15 01:46:47,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [639282169] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:47,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:47,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:46:47,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148990444] [2022-02-15 01:46:47,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:47,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:46:47,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:46:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:46:47,707 INFO L87 Difference]: Start difference. First operand 788 states and 1190 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:50,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:50,744 INFO L93 Difference]: Finished difference Result 804 states and 1205 transitions. [2022-02-15 01:46:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:46:50,745 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:46:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:50,746 INFO L225 Difference]: With dead ends: 804 [2022-02-15 01:46:50,746 INFO L226 Difference]: Without dead ends: 797 [2022-02-15 01:46:50,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5643 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:46:50,747 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 4299 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:50,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 229 Invalid, 4415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4299 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:46:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-02-15 01:46:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 788. [2022-02-15 01:46:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5153846153846153) internal successors, (1182), 782 states have internal predecessors, (1182), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1189 transitions. [2022-02-15 01:46:51,061 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1189 transitions. Word has length 92 [2022-02-15 01:46:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:51,062 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1189 transitions. [2022-02-15 01:46:51,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1189 transitions. [2022-02-15 01:46:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:46:51,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:51,062 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:51,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-02-15 01:46:51,062 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:51,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2034271258, now seen corresponding path program 199 times [2022-02-15 01:46:51,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:51,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710406205] [2022-02-15 01:46:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:51,091 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:51,145 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:51,146 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:51,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:51,146 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:51,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:51,146 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:51,146 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:51,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:51,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:52,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:52,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710406205] [2022-02-15 01:46:52,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [710406205] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:52,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:52,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:46:52,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503016012] [2022-02-15 01:46:52,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:52,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:46:52,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:52,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:46:52,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:46:52,494 INFO L87 Difference]: Start difference. First operand 788 states and 1189 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:55,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:46:55,405 INFO L93 Difference]: Finished difference Result 806 states and 1206 transitions. [2022-02-15 01:46:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:46:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:46:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:46:55,407 INFO L225 Difference]: With dead ends: 806 [2022-02-15 01:46:55,407 INFO L226 Difference]: Without dead ends: 799 [2022-02-15 01:46:55,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6173 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:46:55,409 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3975 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:46:55,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 201 Invalid, 4097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3975 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:46:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-02-15 01:46:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 788. [2022-02-15 01:46:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.514102564102564) internal successors, (1181), 782 states have internal predecessors, (1181), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:46:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1188 transitions. [2022-02-15 01:46:55,716 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1188 transitions. Word has length 92 [2022-02-15 01:46:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:46:55,716 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1188 transitions. [2022-02-15 01:46:55,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:46:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1188 transitions. [2022-02-15 01:46:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:46:55,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:46:55,716 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:46:55,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2022-02-15 01:46:55,717 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:46:55,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:46:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1610674338, now seen corresponding path program 200 times [2022-02-15 01:46:55,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:46:55,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135358241] [2022-02-15 01:46:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:46:55,755 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:55,808 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:46:55,809 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:55,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:55,809 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:55,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:46:55,809 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:46:55,809 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:46:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:46:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:55,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:46:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:46:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:46:57,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:46:57,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135358241] [2022-02-15 01:46:57,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [135358241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:46:57,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:46:57,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:46:57,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628578098] [2022-02-15 01:46:57,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:46:57,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:46:57,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:46:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:46:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:46:57,302 INFO L87 Difference]: Start difference. First operand 788 states and 1188 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:00,845 INFO L93 Difference]: Finished difference Result 808 states and 1207 transitions. [2022-02-15 01:47:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:47:00,846 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:47:00,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:00,847 INFO L225 Difference]: With dead ends: 808 [2022-02-15 01:47:00,847 INFO L226 Difference]: Without dead ends: 801 [2022-02-15 01:47:00,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6673 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=598, Invalid=17492, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:47:00,849 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 5444 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 5572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 5444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:00,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 253 Invalid, 5572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 5444 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:47:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-02-15 01:47:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 788. [2022-02-15 01:47:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5128205128205128) internal successors, (1180), 782 states have internal predecessors, (1180), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1187 transitions. [2022-02-15 01:47:01,159 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1187 transitions. Word has length 92 [2022-02-15 01:47:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:01,159 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1187 transitions. [2022-02-15 01:47:01,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1187 transitions. [2022-02-15 01:47:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:47:01,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:01,159 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:01,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2022-02-15 01:47:01,160 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1532368230, now seen corresponding path program 201 times [2022-02-15 01:47:01,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:01,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595483084] [2022-02-15 01:47:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:01,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:01,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:01,261 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:01,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:01,262 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:01,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:01,262 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:01,262 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:01,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:01,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:02,867 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:02,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595483084] [2022-02-15 01:47:02,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [595483084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:02,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:02,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:47:02,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392058610] [2022-02-15 01:47:02,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:02,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:47:02,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:47:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:47:02,869 INFO L87 Difference]: Start difference. First operand 788 states and 1187 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:06,281 INFO L93 Difference]: Finished difference Result 810 states and 1208 transitions. [2022-02-15 01:47:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:47:06,281 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:47:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:06,282 INFO L225 Difference]: With dead ends: 810 [2022-02-15 01:47:06,283 INFO L226 Difference]: Without dead ends: 803 [2022-02-15 01:47:06,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:47:06,284 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5308 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 5443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 5308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:06,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 235 Invalid, 5443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 5308 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:47:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-02-15 01:47:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 788. [2022-02-15 01:47:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5115384615384615) internal successors, (1179), 782 states have internal predecessors, (1179), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1186 transitions. [2022-02-15 01:47:06,576 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1186 transitions. Word has length 92 [2022-02-15 01:47:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:06,577 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1186 transitions. [2022-02-15 01:47:06,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1186 transitions. [2022-02-15 01:47:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:47:06,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:06,577 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:06,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2022-02-15 01:47:06,577 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:06,578 INFO L85 PathProgramCache]: Analyzing trace with hash -854800606, now seen corresponding path program 202 times [2022-02-15 01:47:06,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:06,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392197915] [2022-02-15 01:47:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:06,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:06,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:06,677 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:06,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:06,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:06,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:06,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:06,678 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:06,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:06,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:08,197 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:08,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392197915] [2022-02-15 01:47:08,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [392197915] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:08,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:08,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:47:08,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470647496] [2022-02-15 01:47:08,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:08,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:47:08,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:08,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:47:08,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:47:08,199 INFO L87 Difference]: Start difference. First operand 788 states and 1186 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:12,324 INFO L93 Difference]: Finished difference Result 812 states and 1209 transitions. [2022-02-15 01:47:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:47:12,324 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:47:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:12,326 INFO L225 Difference]: With dead ends: 812 [2022-02-15 01:47:12,326 INFO L226 Difference]: Without dead ends: 805 [2022-02-15 01:47:12,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8071 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=654, Invalid=20808, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:47:12,327 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6576 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 6717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 6576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:12,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 272 Invalid, 6717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 6576 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 01:47:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-02-15 01:47:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 788. [2022-02-15 01:47:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5102564102564102) internal successors, (1178), 782 states have internal predecessors, (1178), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1185 transitions. [2022-02-15 01:47:12,657 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1185 transitions. Word has length 92 [2022-02-15 01:47:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:12,657 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1185 transitions. [2022-02-15 01:47:12,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1185 transitions. [2022-02-15 01:47:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:47:12,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:12,658 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:12,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2022-02-15 01:47:12,658 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:12,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1522675994, now seen corresponding path program 203 times [2022-02-15 01:47:12,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:12,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900654619] [2022-02-15 01:47:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:12,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:12,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:12,747 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:12,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:12,748 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:12,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:12,748 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:12,748 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:12,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:12,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:14,447 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:14,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900654619] [2022-02-15 01:47:14,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [900654619] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:14,448 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:14,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-15 01:47:14,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511240516] [2022-02-15 01:47:14,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:14,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-15 01:47:14,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-15 01:47:14,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:47:14,449 INFO L87 Difference]: Start difference. First operand 788 states and 1185 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:18,858 INFO L93 Difference]: Finished difference Result 814 states and 1210 transitions. [2022-02-15 01:47:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 01:47:18,858 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:47:18,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:18,860 INFO L225 Difference]: With dead ends: 814 [2022-02-15 01:47:18,860 INFO L226 Difference]: Without dead ends: 807 [2022-02-15 01:47:18,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8745 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=681, Invalid=22575, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 01:47:18,861 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 80 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 6685 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 6832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 6685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:18,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 264 Invalid, 6832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 6685 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 01:47:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-02-15 01:47:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 788. [2022-02-15 01:47:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.508974358974359) internal successors, (1177), 782 states have internal predecessors, (1177), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1184 transitions. [2022-02-15 01:47:19,206 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1184 transitions. Word has length 92 [2022-02-15 01:47:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:19,206 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1184 transitions. [2022-02-15 01:47:19,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:19,206 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1184 transitions. [2022-02-15 01:47:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:47:19,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:19,207 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:19,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2022-02-15 01:47:19,207 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:19,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:19,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1956938334, now seen corresponding path program 204 times [2022-02-15 01:47:19,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:19,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201932881] [2022-02-15 01:47:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:19,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:19,330 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:19,330 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:19,330 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:19,330 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:19,330 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:19,331 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:19,331 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:19,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:19,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:21,271 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:21,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201932881] [2022-02-15 01:47:21,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [201932881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:21,271 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:21,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 01:47:21,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952780070] [2022-02-15 01:47:21,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:21,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 01:47:21,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:21,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 01:47:21,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:47:21,272 INFO L87 Difference]: Start difference. First operand 788 states and 1184 transitions. Second operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:26,339 INFO L93 Difference]: Finished difference Result 816 states and 1211 transitions. [2022-02-15 01:47:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 01:47:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:47:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:26,341 INFO L225 Difference]: With dead ends: 816 [2022-02-15 01:47:26,341 INFO L226 Difference]: Without dead ends: 809 [2022-02-15 01:47:26,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9351 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=706, Invalid=24416, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 01:47:26,343 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 8263 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 8415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 8263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:26,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 306 Invalid, 8415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 8263 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 01:47:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-15 01:47:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 788. [2022-02-15 01:47:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5076923076923077) internal successors, (1176), 782 states have internal predecessors, (1176), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1183 transitions. [2022-02-15 01:47:26,688 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1183 transitions. Word has length 92 [2022-02-15 01:47:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:26,688 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1183 transitions. [2022-02-15 01:47:26,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1183 transitions. [2022-02-15 01:47:26,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:47:26,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:26,689 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:26,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-02-15 01:47:26,689 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:26,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2144249958, now seen corresponding path program 205 times [2022-02-15 01:47:26,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:26,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449545406] [2022-02-15 01:47:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:26,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:26,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:26,771 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:26,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:26,771 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:26,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:26,771 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:26,771 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:26,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:26,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:28,722 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:28,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449545406] [2022-02-15 01:47:28,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [449545406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:28,722 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:28,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-15 01:47:28,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693387786] [2022-02-15 01:47:28,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:28,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-15 01:47:28,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:28,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-15 01:47:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=6725, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 01:47:28,724 INFO L87 Difference]: Start difference. First operand 788 states and 1183 transitions. Second operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:34,023 INFO L93 Difference]: Finished difference Result 817 states and 1211 transitions. [2022-02-15 01:47:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 01:47:34,024 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:47:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:34,025 INFO L225 Difference]: With dead ends: 817 [2022-02-15 01:47:34,025 INFO L226 Difference]: Without dead ends: 810 [2022-02-15 01:47:34,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10243 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=735, Invalid=26325, Unknown=0, NotChecked=0, Total=27060 [2022-02-15 01:47:34,026 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 83 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 8536 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 8694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 8536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:34,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 303 Invalid, 8694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 8536 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 01:47:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-02-15 01:47:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 788. [2022-02-15 01:47:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.5064102564102564) internal successors, (1175), 782 states have internal predecessors, (1175), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1182 transitions. [2022-02-15 01:47:34,389 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1182 transitions. Word has length 92 [2022-02-15 01:47:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:34,389 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1182 transitions. [2022-02-15 01:47:34,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1182 transitions. [2022-02-15 01:47:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:47:34,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:34,390 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:34,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-02-15 01:47:34,390 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:34,391 INFO L85 PathProgramCache]: Analyzing trace with hash -23784414, now seen corresponding path program 206 times [2022-02-15 01:47:34,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:34,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015064644] [2022-02-15 01:47:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:34,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:34,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:34,479 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:34,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:34,479 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:34,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:34,479 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:34,479 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:34,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:36,536 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:36,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015064644] [2022-02-15 01:47:36,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2015064644] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:36,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:36,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-15 01:47:36,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175075624] [2022-02-15 01:47:36,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:36,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-15 01:47:36,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:36,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-15 01:47:36,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=7226, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:47:36,538 INFO L87 Difference]: Start difference. First operand 788 states and 1182 transitions. Second operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:42,940 INFO L93 Difference]: Finished difference Result 947 states and 1418 transitions. [2022-02-15 01:47:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 01:47:42,940 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:47:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:42,942 INFO L225 Difference]: With dead ends: 947 [2022-02-15 01:47:42,942 INFO L226 Difference]: Without dead ends: 914 [2022-02-15 01:47:42,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11043 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=760, Invalid=28310, Unknown=0, NotChecked=0, Total=29070 [2022-02-15 01:47:42,943 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 92 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 11456 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 11700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 11456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:42,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 325 Invalid, 11700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 11456 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-15 01:47:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-02-15 01:47:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 866. [2022-02-15 01:47:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 858 states have (on average 1.5198135198135199) internal successors, (1304), 860 states have internal predecessors, (1304), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1311 transitions. [2022-02-15 01:47:43,281 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1311 transitions. Word has length 92 [2022-02-15 01:47:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:43,281 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1311 transitions. [2022-02-15 01:47:43,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1311 transitions. [2022-02-15 01:47:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:47:43,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:43,282 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:43,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-02-15 01:47:43,282 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1751222948, now seen corresponding path program 207 times [2022-02-15 01:47:43,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:43,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045450092] [2022-02-15 01:47:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:43,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:43,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:43,380 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:43,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:43,380 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:43,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:43,380 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:43,380 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:43,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:43,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:45,562 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:45,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045450092] [2022-02-15 01:47:45,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045450092] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:45,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:45,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-15 01:47:45,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29645648] [2022-02-15 01:47:45,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:45,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-15 01:47:45,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-15 01:47:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 01:47:45,564 INFO L87 Difference]: Start difference. First operand 866 states and 1311 transitions. Second operand has 88 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 86 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:51,483 INFO L93 Difference]: Finished difference Result 902 states and 1349 transitions. [2022-02-15 01:47:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-15 01:47:51,484 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 86 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:47:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:51,485 INFO L225 Difference]: With dead ends: 902 [2022-02-15 01:47:51,485 INFO L226 Difference]: Without dead ends: 894 [2022-02-15 01:47:51,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11542 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=778, Invalid=29672, Unknown=0, NotChecked=0, Total=30450 [2022-02-15 01:47:51,487 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 109 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 9759 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 9944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 9759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:51,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 321 Invalid, 9944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 9759 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 01:47:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-02-15 01:47:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 868. [2022-02-15 01:47:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 860 states have (on average 1.5186046511627906) internal successors, (1306), 862 states have internal predecessors, (1306), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1313 transitions. [2022-02-15 01:47:51,821 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1313 transitions. Word has length 92 [2022-02-15 01:47:51,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:51,822 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1313 transitions. [2022-02-15 01:47:51,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 86 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1313 transitions. [2022-02-15 01:47:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:47:51,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:51,822 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:51,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2022-02-15 01:47:51,822 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash -722856354, now seen corresponding path program 208 times [2022-02-15 01:47:51,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:51,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042503666] [2022-02-15 01:47:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:51,860 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:51,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:51,913 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:51,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:51,913 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:51,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:51,913 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:51,913 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:51,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:52,842 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:52,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042503666] [2022-02-15 01:47:52,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042503666] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:52,843 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:52,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:47:52,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664782816] [2022-02-15 01:47:52,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:52,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:47:52,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:47:52,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:47:52,844 INFO L87 Difference]: Start difference. First operand 868 states and 1313 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:54,769 INFO L93 Difference]: Finished difference Result 875 states and 1319 transitions. [2022-02-15 01:47:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:47:54,770 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:47:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:54,771 INFO L225 Difference]: With dead ends: 875 [2022-02-15 01:47:54,771 INFO L226 Difference]: Without dead ends: 868 [2022-02-15 01:47:54,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=438, Invalid=9264, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:47:54,772 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:54,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 175 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:47:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-02-15 01:47:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 827. [2022-02-15 01:47:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5274725274725274) internal successors, (1251), 821 states have internal predecessors, (1251), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1258 transitions. [2022-02-15 01:47:55,135 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1258 transitions. Word has length 95 [2022-02-15 01:47:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:55,136 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1258 transitions. [2022-02-15 01:47:55,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1258 transitions. [2022-02-15 01:47:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:47:55,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:55,137 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:55,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2022-02-15 01:47:55,137 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:55,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2102809626, now seen corresponding path program 209 times [2022-02-15 01:47:55,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:55,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243624772] [2022-02-15 01:47:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:55,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:55,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:55,227 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:55,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:55,227 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:55,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:55,227 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:55,227 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:55,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:55,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:47:56,310 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:47:56,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243624772] [2022-02-15 01:47:56,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [243624772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:47:56,311 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:47:56,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:47:56,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384684646] [2022-02-15 01:47:56,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:47:56,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:47:56,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:47:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:47:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:47:56,312 INFO L87 Difference]: Start difference. First operand 827 states and 1258 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:47:58,490 INFO L93 Difference]: Finished difference Result 836 states and 1266 transitions. [2022-02-15 01:47:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:47:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:47:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:47:58,491 INFO L225 Difference]: With dead ends: 836 [2022-02-15 01:47:58,492 INFO L226 Difference]: Without dead ends: 829 [2022-02-15 01:47:58,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4080 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=465, Invalid=10455, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:47:58,492 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:47:58,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 192 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2761 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:47:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-02-15 01:47:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 827. [2022-02-15 01:47:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5262515262515262) internal successors, (1250), 821 states have internal predecessors, (1250), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:47:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1257 transitions. [2022-02-15 01:47:58,891 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1257 transitions. Word has length 95 [2022-02-15 01:47:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:47:58,891 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1257 transitions. [2022-02-15 01:47:58,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:47:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1257 transitions. [2022-02-15 01:47:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:47:58,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:47:58,892 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:47:58,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2022-02-15 01:47:58,892 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:47:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:47:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1717743650, now seen corresponding path program 210 times [2022-02-15 01:47:58,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:47:58,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721882058] [2022-02-15 01:47:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:47:58,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:58,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:47:58,974 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:58,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:58,975 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:58,975 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:47:58,975 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:47:58,975 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:47:58,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:47:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:59,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:47:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:47:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:00,090 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:00,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721882058] [2022-02-15 01:48:00,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [721882058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:00,090 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:00,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:48:00,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086538464] [2022-02-15 01:48:00,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:00,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:48:00,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:48:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:48:00,092 INFO L87 Difference]: Start difference. First operand 827 states and 1257 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:02,503 INFO L93 Difference]: Finished difference Result 838 states and 1267 transitions. [2022-02-15 01:48:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:48:02,503 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:48:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:02,505 INFO L225 Difference]: With dead ends: 838 [2022-02-15 01:48:02,505 INFO L226 Difference]: Without dead ends: 831 [2022-02-15 01:48:02,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=492, Invalid=11718, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:48:02,506 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3218 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:02,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 204 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3218 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:48:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-02-15 01:48:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 827. [2022-02-15 01:48:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.525030525030525) internal successors, (1249), 821 states have internal predecessors, (1249), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:48:02,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1256 transitions. [2022-02-15 01:48:02,813 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1256 transitions. Word has length 95 [2022-02-15 01:48:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:02,813 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1256 transitions. [2022-02-15 01:48:02,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1256 transitions. [2022-02-15 01:48:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:48:02,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:02,814 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:02,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2022-02-15 01:48:02,814 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash 545884826, now seen corresponding path program 211 times [2022-02-15 01:48:02,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:02,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943710893] [2022-02-15 01:48:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:02,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:02,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:02,907 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:02,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:02,907 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:02,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:02,907 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:02,907 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:02,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:02,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:04,027 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:04,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943710893] [2022-02-15 01:48:04,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [943710893] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:04,027 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:04,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:48:04,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280628986] [2022-02-15 01:48:04,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:04,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:48:04,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:48:04,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:48:04,028 INFO L87 Difference]: Start difference. First operand 827 states and 1256 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:06,366 INFO L93 Difference]: Finished difference Result 840 states and 1268 transitions. [2022-02-15 01:48:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:48:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:48:06,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:06,368 INFO L225 Difference]: With dead ends: 840 [2022-02-15 01:48:06,368 INFO L226 Difference]: Without dead ends: 833 [2022-02-15 01:48:06,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4997 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=13053, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:48:06,369 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3328 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:06,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 196 Invalid, 3438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3328 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:48:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-02-15 01:48:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 827. [2022-02-15 01:48:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5238095238095237) internal successors, (1248), 821 states have internal predecessors, (1248), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:48:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1255 transitions. [2022-02-15 01:48:06,675 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1255 transitions. Word has length 95 [2022-02-15 01:48:06,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:06,675 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1255 transitions. [2022-02-15 01:48:06,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:06,675 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1255 transitions. [2022-02-15 01:48:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:48:06,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:06,675 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:06,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2022-02-15 01:48:06,676 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash -845567650, now seen corresponding path program 212 times [2022-02-15 01:48:06,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:06,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784571758] [2022-02-15 01:48:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:06,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:06,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:06,759 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:06,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:06,759 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:06,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:06,759 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:06,759 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:06,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:06,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:07,913 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:07,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784571758] [2022-02-15 01:48:07,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784571758] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:07,914 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:07,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:48:07,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518053928] [2022-02-15 01:48:07,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:07,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:48:07,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:07,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:48:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:48:07,915 INFO L87 Difference]: Start difference. First operand 827 states and 1255 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:10,474 INFO L93 Difference]: Finished difference Result 842 states and 1269 transitions. [2022-02-15 01:48:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:48:10,474 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:48:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:10,475 INFO L225 Difference]: With dead ends: 842 [2022-02-15 01:48:10,475 INFO L226 Difference]: Without dead ends: 835 [2022-02-15 01:48:10,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5557 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=14460, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:48:10,476 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3619 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:10,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 198 Invalid, 3735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3619 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:48:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-15 01:48:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 827. [2022-02-15 01:48:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5225885225885225) internal successors, (1247), 821 states have internal predecessors, (1247), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:48:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1254 transitions. [2022-02-15 01:48:10,849 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1254 transitions. Word has length 95 [2022-02-15 01:48:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:10,850 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1254 transitions. [2022-02-15 01:48:10,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1254 transitions. [2022-02-15 01:48:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:48:10,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:10,851 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:10,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2022-02-15 01:48:10,851 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:10,851 INFO L85 PathProgramCache]: Analyzing trace with hash 503816474, now seen corresponding path program 213 times [2022-02-15 01:48:10,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:10,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865060682] [2022-02-15 01:48:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:10,888 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:10,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:10,961 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:10,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:10,961 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:10,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:10,961 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:10,961 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:10,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:10,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:12,237 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:12,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865060682] [2022-02-15 01:48:12,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1865060682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:12,237 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:12,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:48:12,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455546066] [2022-02-15 01:48:12,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:12,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:48:12,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:12,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:48:12,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:48:12,239 INFO L87 Difference]: Start difference. First operand 827 states and 1254 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:15,249 INFO L93 Difference]: Finished difference Result 844 states and 1270 transitions. [2022-02-15 01:48:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:48:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:48:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:15,251 INFO L225 Difference]: With dead ends: 844 [2022-02-15 01:48:15,251 INFO L226 Difference]: Without dead ends: 837 [2022-02-15 01:48:15,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6161 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=15939, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:48:15,252 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 65 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4342 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 4464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:15,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 220 Invalid, 4464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4342 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:48:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-02-15 01:48:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 827. [2022-02-15 01:48:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5213675213675213) internal successors, (1246), 821 states have internal predecessors, (1246), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:48:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1253 transitions. [2022-02-15 01:48:15,593 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1253 transitions. Word has length 95 [2022-02-15 01:48:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:15,594 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1253 transitions. [2022-02-15 01:48:15,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1253 transitions. [2022-02-15 01:48:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:48:15,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:15,594 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:15,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2022-02-15 01:48:15,595 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:15,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1714889438, now seen corresponding path program 214 times [2022-02-15 01:48:15,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:15,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19635169] [2022-02-15 01:48:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:15,633 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:15,703 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:15,704 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:15,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:15,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:15,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:15,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:15,704 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:15,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:15,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:17,169 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:17,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19635169] [2022-02-15 01:48:17,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [19635169] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:17,170 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:17,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:48:17,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734770949] [2022-02-15 01:48:17,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:17,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:48:17,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:17,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:48:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:48:17,171 INFO L87 Difference]: Start difference. First operand 827 states and 1253 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:20,445 INFO L93 Difference]: Finished difference Result 846 states and 1271 transitions. [2022-02-15 01:48:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:48:20,446 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:48:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:20,447 INFO L225 Difference]: With dead ends: 846 [2022-02-15 01:48:20,448 INFO L226 Difference]: Without dead ends: 839 [2022-02-15 01:48:20,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=598, Invalid=17492, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:48:20,449 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4314 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 4443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 4314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:20,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 207 Invalid, 4443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 4314 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:48:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-02-15 01:48:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 827. [2022-02-15 01:48:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.52014652014652) internal successors, (1245), 821 states have internal predecessors, (1245), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:48:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1252 transitions. [2022-02-15 01:48:20,881 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1252 transitions. Word has length 95 [2022-02-15 01:48:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:20,881 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1252 transitions. [2022-02-15 01:48:20,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1252 transitions. [2022-02-15 01:48:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:48:20,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:20,882 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:20,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2022-02-15 01:48:20,882 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:20,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1064867738, now seen corresponding path program 215 times [2022-02-15 01:48:20,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:20,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805030094] [2022-02-15 01:48:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:20,924 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:21,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:21,006 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:21,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:21,006 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:21,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:21,006 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:21,006 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:21,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:21,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:22,696 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:22,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805030094] [2022-02-15 01:48:22,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805030094] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:22,696 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:22,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:48:22,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463742801] [2022-02-15 01:48:22,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:22,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:48:22,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:48:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:48:22,698 INFO L87 Difference]: Start difference. First operand 827 states and 1252 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:26,196 INFO L93 Difference]: Finished difference Result 848 states and 1272 transitions. [2022-02-15 01:48:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:48:26,196 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:48:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:26,197 INFO L225 Difference]: With dead ends: 848 [2022-02-15 01:48:26,197 INFO L226 Difference]: Without dead ends: 841 [2022-02-15 01:48:26,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7415 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=627, Invalid=19113, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:48:26,198 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 5108 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 5243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 5108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:26,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 229 Invalid, 5243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 5108 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:48:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-02-15 01:48:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 827. [2022-02-15 01:48:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5189255189255189) internal successors, (1244), 821 states have internal predecessors, (1244), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:48:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1251 transitions. [2022-02-15 01:48:26,505 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1251 transitions. Word has length 95 [2022-02-15 01:48:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:26,506 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1251 transitions. [2022-02-15 01:48:26,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1251 transitions. [2022-02-15 01:48:26,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:48:26,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:26,506 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:26,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2022-02-15 01:48:26,506 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:26,507 INFO L85 PathProgramCache]: Analyzing trace with hash 986561630, now seen corresponding path program 216 times [2022-02-15 01:48:26,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:26,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325680316] [2022-02-15 01:48:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:26,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:26,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:26,579 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:26,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:26,580 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:26,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:26,580 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:26,580 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:26,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:26,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:28,226 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:28,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325680316] [2022-02-15 01:48:28,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [325680316] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:28,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:28,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:48:28,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382214177] [2022-02-15 01:48:28,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:28,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:48:28,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:28,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:48:28,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:48:28,227 INFO L87 Difference]: Start difference. First operand 827 states and 1251 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:32,312 INFO L93 Difference]: Finished difference Result 850 states and 1273 transitions. [2022-02-15 01:48:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:48:32,312 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:48:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:32,314 INFO L225 Difference]: With dead ends: 850 [2022-02-15 01:48:32,314 INFO L226 Difference]: Without dead ends: 843 [2022-02-15 01:48:32,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7950 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=652, Invalid=20810, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:48:32,316 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 6219 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 6359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 6219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:32,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 261 Invalid, 6359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 6219 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 01:48:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-02-15 01:48:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 827. [2022-02-15 01:48:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5177045177045176) internal successors, (1243), 821 states have internal predecessors, (1243), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:48:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1250 transitions. [2022-02-15 01:48:32,675 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1250 transitions. Word has length 95 [2022-02-15 01:48:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:32,675 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1250 transitions. [2022-02-15 01:48:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1250 transitions. [2022-02-15 01:48:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:48:32,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:32,676 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:32,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2022-02-15 01:48:32,676 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:32,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1400607206, now seen corresponding path program 217 times [2022-02-15 01:48:32,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:32,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202135582] [2022-02-15 01:48:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:32,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:32,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:32,778 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:32,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:32,778 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:32,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:32,779 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:32,779 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:32,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:32,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:34,503 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:34,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202135582] [2022-02-15 01:48:34,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1202135582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:34,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:34,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-15 01:48:34,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744128633] [2022-02-15 01:48:34,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:34,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-15 01:48:34,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-15 01:48:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:48:34,504 INFO L87 Difference]: Start difference. First operand 827 states and 1250 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:38,627 INFO L93 Difference]: Finished difference Result 852 states and 1274 transitions. [2022-02-15 01:48:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 01:48:38,627 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:48:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:38,628 INFO L225 Difference]: With dead ends: 852 [2022-02-15 01:48:38,628 INFO L226 Difference]: Without dead ends: 845 [2022-02-15 01:48:38,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8788 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=681, Invalid=22575, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 01:48:38,630 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 6460 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 6607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 6460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:38,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 258 Invalid, 6607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 6460 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 01:48:38,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-02-15 01:48:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 827. [2022-02-15 01:48:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5164835164835164) internal successors, (1242), 821 states have internal predecessors, (1242), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:48:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1249 transitions. [2022-02-15 01:48:38,936 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1249 transitions. Word has length 95 [2022-02-15 01:48:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:38,936 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1249 transitions. [2022-02-15 01:48:38,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1249 transitions. [2022-02-15 01:48:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:48:38,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:38,937 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:38,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2022-02-15 01:48:38,937 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2068482594, now seen corresponding path program 218 times [2022-02-15 01:48:38,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:38,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36972061] [2022-02-15 01:48:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:38,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:39,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:39,027 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:39,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:39,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:39,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:39,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:39,028 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:39,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:40,864 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:40,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36972061] [2022-02-15 01:48:40,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [36972061] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:40,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:40,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 01:48:40,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628150920] [2022-02-15 01:48:40,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:40,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 01:48:40,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 01:48:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:48:40,866 INFO L87 Difference]: Start difference. First operand 827 states and 1249 transitions. Second operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:48:45,348 INFO L93 Difference]: Finished difference Result 854 states and 1275 transitions. [2022-02-15 01:48:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 01:48:45,348 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:48:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:48:45,349 INFO L225 Difference]: With dead ends: 854 [2022-02-15 01:48:45,349 INFO L226 Difference]: Without dead ends: 847 [2022-02-15 01:48:45,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9366 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=706, Invalid=24416, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 01:48:45,351 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 87 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 6969 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 7122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 6969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:48:45,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 265 Invalid, 7122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 6969 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 01:48:45,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-02-15 01:48:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 827. [2022-02-15 01:48:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.5152625152625152) internal successors, (1241), 821 states have internal predecessors, (1241), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:48:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1248 transitions. [2022-02-15 01:48:45,672 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1248 transitions. Word has length 95 [2022-02-15 01:48:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:48:45,672 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1248 transitions. [2022-02-15 01:48:45,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:48:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1248 transitions. [2022-02-15 01:48:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:48:45,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:48:45,673 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:48:45,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2022-02-15 01:48:45,673 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:48:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:48:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1792222362, now seen corresponding path program 219 times [2022-02-15 01:48:45,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:48:45,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094529050] [2022-02-15 01:48:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:48:45,699 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:45,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:48:45,768 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:45,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:45,768 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:45,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:48:45,768 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:48:45,768 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:48:45,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:48:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:45,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:48:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:48:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:48:47,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:48:47,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094529050] [2022-02-15 01:48:47,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094529050] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:48:47,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:48:47,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-15 01:48:47,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738002680] [2022-02-15 01:48:47,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:48:47,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-15 01:48:47,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:48:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-15 01:48:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=6725, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 01:48:47,694 INFO L87 Difference]: Start difference. First operand 827 states and 1248 transitions. Second operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)