/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:37:44,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:37:44,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:37:44,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:37:44,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:37:44,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:37:44,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:37:44,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:37:44,698 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:37:44,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:37:44,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:37:44,700 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:37:44,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:37:44,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:37:44,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:37:44,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:37:44,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:37:44,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:37:44,701 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:37:44,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:37:44,702 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:37:44,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:37:44,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:37:44,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:37:44,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:37:44,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:37:44,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:37:44,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:37:44,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:37:44,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:37:44,707 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:37:44,708 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:37:44,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:37:44,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:37:44,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:37:45,000 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:37:45,001 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:37:45,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-02-24 01:37:45,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/247f3152f/ad89339a770e4e0fbf55d9d049790504/FLAGb6e73f732 [2022-02-24 01:37:45,454 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:37:45,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-02-24 01:37:45,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/247f3152f/ad89339a770e4e0fbf55d9d049790504/FLAGb6e73f732 [2022-02-24 01:37:45,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/247f3152f/ad89339a770e4e0fbf55d9d049790504 [2022-02-24 01:37:45,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:37:45,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:37:45,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:37:45,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:37:45,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:37:45,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:37:45" (1/1) ... [2022-02-24 01:37:45,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@361940ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:45, skipping insertion in model container [2022-02-24 01:37:45,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:37:45" (1/1) ... [2022-02-24 01:37:45,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:37:45,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:37:46,046 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-02-24 01:37:46,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:37:46,062 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:37:46,074 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-02-24 01:37:46,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:37:46,108 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:37:46,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46 WrapperNode [2022-02-24 01:37:46,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:37:46,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:37:46,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:37:46,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:37:46,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46" (1/1) ... [2022-02-24 01:37:46,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46" (1/1) ... [2022-02-24 01:37:46,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46" (1/1) ... [2022-02-24 01:37:46,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46" (1/1) ... [2022-02-24 01:37:46,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46" (1/1) ... [2022-02-24 01:37:46,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46" (1/1) ... [2022-02-24 01:37:46,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46" (1/1) ... [2022-02-24 01:37:46,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:37:46,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:37:46,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:37:46,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:37:46,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46" (1/1) ... [2022-02-24 01:37:46,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:37:46,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:37:46,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 01:37:46,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 01:37:46,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:37:46,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:37:46,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:37:46,208 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 01:37:46,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:37:46,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:37:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:37:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:37:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:37:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:37:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:37:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 01:37:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:37:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:37:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:37:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:37:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:37:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:37:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:37:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:37:46,267 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:37:46,268 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:37:46,398 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:37:46,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:37:46,403 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 01:37:46,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:37:46 BoogieIcfgContainer [2022-02-24 01:37:46,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:37:46,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:37:46,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:37:46,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:37:46,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:37:45" (1/3) ... [2022-02-24 01:37:46,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7993aad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:37:46, skipping insertion in model container [2022-02-24 01:37:46,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:37:46" (2/3) ... [2022-02-24 01:37:46,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7993aad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:37:46, skipping insertion in model container [2022-02-24 01:37:46,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:37:46" (3/3) ... [2022-02-24 01:37:46,423 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2022-02-24 01:37:46,427 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:37:46,428 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:37:46,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:37:46,510 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 [2022-02-24 01:37:46,510 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:37:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:37:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 01:37:46,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:46,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:46,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash -380103047, now seen corresponding path program 1 times [2022-02-24 01:37:46,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:46,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090918744] [2022-02-24 01:37:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:46,632 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:37:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:46,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:46,851 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:46,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090918744] [2022-02-24 01:37:46,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1090918744] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:46,853 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:46,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:37:46,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74307707] [2022-02-24 01:37:46,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:46,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:37:46,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:37:46,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:37:46,880 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:46,986 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-02-24 01:37:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:37:46,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 01:37:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:46,993 INFO L225 Difference]: With dead ends: 36 [2022-02-24 01:37:46,993 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 01:37:46,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:37:47,002 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:47,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 01:37:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-02-24 01:37:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-02-24 01:37:47,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-02-24 01:37:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:47,051 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-02-24 01:37:47,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-02-24 01:37:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 01:37:47,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:47,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:47,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:37:47,054 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 437044508, now seen corresponding path program 1 times [2022-02-24 01:37:47,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:47,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240901453] [2022-02-24 01:37:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:47,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:47,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:37:47,316 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 01:37:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:47,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:47,834 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:47,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240901453] [2022-02-24 01:37:47,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [240901453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:47,835 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:47,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:37:47,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583296645] [2022-02-24 01:37:47,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:47,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:37:47,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:37:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:47,837 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:48,574 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-02-24 01:37:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:37:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 01:37:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:48,576 INFO L225 Difference]: With dead ends: 24 [2022-02-24 01:37:48,576 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 01:37:48,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:37:48,578 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:48,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:37:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 01:37:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-02-24 01:37:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-24 01:37:48,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2022-02-24 01:37:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:48,591 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-24 01:37:48,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-24 01:37:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 01:37:48,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:48,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:48,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:37:48,594 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:48,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2082915426, now seen corresponding path program 1 times [2022-02-24 01:37:48,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:48,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511554261] [2022-02-24 01:37:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:48,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:48,725 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:37:48,726 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 01:37:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:48,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:49,090 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:49,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511554261] [2022-02-24 01:37:49,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511554261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:49,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:49,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:37:49,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404980326] [2022-02-24 01:37:49,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:49,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:37:49,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:49,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:37:49,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:49,093 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:49,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:49,518 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-02-24 01:37:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:37:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 01:37:49,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:49,520 INFO L225 Difference]: With dead ends: 26 [2022-02-24 01:37:49,520 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 01:37:49,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:37:49,521 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:49,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 01:37:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 01:37:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-02-24 01:37:49,532 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2022-02-24 01:37:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:49,533 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-02-24 01:37:49,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-02-24 01:37:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 01:37:49,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:49,534 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:49,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:37:49,534 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1511837057, now seen corresponding path program 1 times [2022-02-24 01:37:49,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:49,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063313188] [2022-02-24 01:37:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:49,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:49,540 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:49,541 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:49,541 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:49,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:49,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:49,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063313188] [2022-02-24 01:37:49,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2063313188] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:49,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:49,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:37:49,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887806334] [2022-02-24 01:37:49,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:49,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:37:49,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:49,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:37:49,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:37:49,600 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:49,673 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-24 01:37:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:37:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 01:37:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:49,674 INFO L225 Difference]: With dead ends: 34 [2022-02-24 01:37:49,674 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 01:37:49,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:37:49,676 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:49,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 01:37:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2022-02-24 01:37:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-02-24 01:37:49,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2022-02-24 01:37:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:49,685 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-02-24 01:37:49,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-02-24 01:37:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 01:37:49,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:49,686 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:49,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:37:49,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash 416888065, now seen corresponding path program 2 times [2022-02-24 01:37:49,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:49,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305983861] [2022-02-24 01:37:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:49,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:49,690 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:49,690 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:49,690 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:49,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:49,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:49,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305983861] [2022-02-24 01:37:49,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305983861] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:49,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:49,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:37:49,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532128624] [2022-02-24 01:37:49,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:49,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:37:49,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:49,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:37:49,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:37:49,744 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:49,825 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-02-24 01:37:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:37:49,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 01:37:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:49,830 INFO L225 Difference]: With dead ends: 35 [2022-02-24 01:37:49,831 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 01:37:49,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:37:49,838 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:49,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 01:37:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-02-24 01:37:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-02-24 01:37:49,852 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2022-02-24 01:37:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:49,852 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-02-24 01:37:49,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-02-24 01:37:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 01:37:49,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:49,853 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:49,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:37:49,853 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1379700060, now seen corresponding path program 3 times [2022-02-24 01:37:49,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:49,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361691673] [2022-02-24 01:37:49,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:49,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:49,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:49,859 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:49,859 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:49,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:49,941 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:49,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361691673] [2022-02-24 01:37:49,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361691673] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:49,941 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:49,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:37:49,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213930339] [2022-02-24 01:37:49,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:49,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:37:49,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:49,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:37:49,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:37:49,944 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:50,051 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-02-24 01:37:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:37:50,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 01:37:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:50,052 INFO L225 Difference]: With dead ends: 40 [2022-02-24 01:37:50,052 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 01:37:50,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:50,053 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:50,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 17 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 01:37:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-02-24 01:37:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-02-24 01:37:50,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2022-02-24 01:37:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:50,064 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-02-24 01:37:50,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-02-24 01:37:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 01:37:50,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:50,065 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:50,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:37:50,065 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:50,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1820318244, now seen corresponding path program 4 times [2022-02-24 01:37:50,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:50,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098120327] [2022-02-24 01:37:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:50,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:50,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:50,069 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:50,069 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:50,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:50,122 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:50,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098120327] [2022-02-24 01:37:50,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2098120327] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:50,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:50,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:37:50,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969007958] [2022-02-24 01:37:50,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:50,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:37:50,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:37:50,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:37:50,124 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:50,222 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-02-24 01:37:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:37:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 01:37:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:50,223 INFO L225 Difference]: With dead ends: 44 [2022-02-24 01:37:50,223 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 01:37:50,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:50,224 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:50,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 19 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 01:37:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-02-24 01:37:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-02-24 01:37:50,237 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 18 [2022-02-24 01:37:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:50,238 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-02-24 01:37:50,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-02-24 01:37:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 01:37:50,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:50,239 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:50,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:37:50,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:50,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1841324452, now seen corresponding path program 5 times [2022-02-24 01:37:50,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:50,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503341692] [2022-02-24 01:37:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:50,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:50,248 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:50,248 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:50,248 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:50,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:50,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:50,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503341692] [2022-02-24 01:37:50,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503341692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:50,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:50,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:37:50,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928349973] [2022-02-24 01:37:50,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:50,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:37:50,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:37:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:37:50,341 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:50,454 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-02-24 01:37:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:37:50,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 01:37:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:50,457 INFO L225 Difference]: With dead ends: 44 [2022-02-24 01:37:50,457 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 01:37:50,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:50,460 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:50,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 19 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 01:37:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-02-24 01:37:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-02-24 01:37:50,476 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 18 [2022-02-24 01:37:50,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:50,479 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-02-24 01:37:50,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-02-24 01:37:50,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 01:37:50,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:50,481 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:50,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:37:50,481 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1303028985, now seen corresponding path program 6 times [2022-02-24 01:37:50,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:50,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334020102] [2022-02-24 01:37:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:50,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:50,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:50,486 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:50,487 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:50,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:50,567 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:50,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334020102] [2022-02-24 01:37:50,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [334020102] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:50,568 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:50,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:37:50,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863203761] [2022-02-24 01:37:50,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:50,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:37:50,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:37:50,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:37:50,569 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:50,700 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-02-24 01:37:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:37:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 01:37:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:50,701 INFO L225 Difference]: With dead ends: 46 [2022-02-24 01:37:50,701 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 01:37:50,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:37:50,702 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:50,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 01:37:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-02-24 01:37:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-24 01:37:50,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 20 [2022-02-24 01:37:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:50,714 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-24 01:37:50,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-24 01:37:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 01:37:50,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:50,715 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:50,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:37:50,715 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:50,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1896989319, now seen corresponding path program 7 times [2022-02-24 01:37:50,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:50,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937901146] [2022-02-24 01:37:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:50,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:50,719 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:50,719 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:50,719 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:50,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:50,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:50,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937901146] [2022-02-24 01:37:50,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [937901146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:50,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:50,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:37:50,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676333648] [2022-02-24 01:37:50,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:50,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:37:50,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:37:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:37:50,784 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:50,916 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-02-24 01:37:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:37:50,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 01:37:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:50,917 INFO L225 Difference]: With dead ends: 50 [2022-02-24 01:37:50,917 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 01:37:50,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:37:50,918 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:50,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 01:37:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-02-24 01:37:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-02-24 01:37:50,932 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 20 [2022-02-24 01:37:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:50,932 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-02-24 01:37:50,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-02-24 01:37:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 01:37:50,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:50,933 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:50,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:37:50,933 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:50,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1917995527, now seen corresponding path program 8 times [2022-02-24 01:37:50,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:50,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409052674] [2022-02-24 01:37:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:50,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:50,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:50,937 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:50,937 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:50,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:51,003 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:51,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409052674] [2022-02-24 01:37:51,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409052674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:51,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:51,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:37:51,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525796236] [2022-02-24 01:37:51,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:51,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:37:51,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:51,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:37:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:37:51,005 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:51,139 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-02-24 01:37:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:37:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 01:37:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:51,141 INFO L225 Difference]: With dead ends: 56 [2022-02-24 01:37:51,141 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 01:37:51,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:37:51,142 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:51,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 01:37:51,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-02-24 01:37:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-02-24 01:37:51,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 20 [2022-02-24 01:37:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:51,157 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-02-24 01:37:51,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-02-24 01:37:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 01:37:51,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:51,159 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:51,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:37:51,160 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash 630124935, now seen corresponding path program 9 times [2022-02-24 01:37:51,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:51,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225400760] [2022-02-24 01:37:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:51,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:51,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:51,164 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:51,164 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:51,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:51,222 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:51,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225400760] [2022-02-24 01:37:51,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225400760] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:51,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:51,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:37:51,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050383433] [2022-02-24 01:37:51,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:51,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:37:51,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:51,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:37:51,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:37:51,224 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:51,356 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-02-24 01:37:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:37:51,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 01:37:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:51,357 INFO L225 Difference]: With dead ends: 54 [2022-02-24 01:37:51,357 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 01:37:51,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:37:51,358 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:51,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 01:37:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2022-02-24 01:37:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-02-24 01:37:51,371 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 20 [2022-02-24 01:37:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:51,371 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-02-24 01:37:51,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-02-24 01:37:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:37:51,372 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:51,372 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:51,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:37:51,372 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash -636569942, now seen corresponding path program 10 times [2022-02-24 01:37:51,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:51,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74326024] [2022-02-24 01:37:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:51,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:51,376 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:51,376 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:51,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:51,441 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:51,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74326024] [2022-02-24 01:37:51,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [74326024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:51,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:51,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:37:51,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457774414] [2022-02-24 01:37:51,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:51,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:37:51,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:37:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:37:51,442 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:51,592 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-02-24 01:37:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:37:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 01:37:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:51,593 INFO L225 Difference]: With dead ends: 52 [2022-02-24 01:37:51,593 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 01:37:51,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:37:51,594 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:51,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 01:37:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-02-24 01:37:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-02-24 01:37:51,608 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 22 [2022-02-24 01:37:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:51,608 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-02-24 01:37:51,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-02-24 01:37:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:37:51,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:51,609 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:51,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:37:51,609 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:51,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1731518934, now seen corresponding path program 11 times [2022-02-24 01:37:51,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:51,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561538110] [2022-02-24 01:37:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:51,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:51,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:51,613 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:51,613 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:51,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:51,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561538110] [2022-02-24 01:37:51,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561538110] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:51,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:51,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:37:51,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471097900] [2022-02-24 01:37:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:51,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:37:51,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:37:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:37:51,677 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:51,814 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-02-24 01:37:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:37:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 01:37:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:51,815 INFO L225 Difference]: With dead ends: 56 [2022-02-24 01:37:51,815 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 01:37:51,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:37:51,816 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:51,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 01:37:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-02-24 01:37:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2022-02-24 01:37:51,830 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 22 [2022-02-24 01:37:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:51,831 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2022-02-24 01:37:51,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2022-02-24 01:37:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:37:51,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:51,831 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:51,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:37:51,832 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:51,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1710512726, now seen corresponding path program 12 times [2022-02-24 01:37:51,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:51,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46666071] [2022-02-24 01:37:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:51,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:51,835 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:51,835 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:51,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:51,896 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:51,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46666071] [2022-02-24 01:37:51,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [46666071] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:51,896 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:51,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:37:51,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131105354] [2022-02-24 01:37:51,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:51,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:37:51,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:37:51,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:37:51,898 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:52,054 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-02-24 01:37:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:37:52,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 01:37:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:52,057 INFO L225 Difference]: With dead ends: 62 [2022-02-24 01:37:52,057 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 01:37:52,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:37:52,059 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:52,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 01:37:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-02-24 01:37:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-24 01:37:52,074 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 22 [2022-02-24 01:37:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:52,074 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-24 01:37:52,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-24 01:37:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:37:52,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:52,075 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:52,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:37:52,075 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1296583978, now seen corresponding path program 13 times [2022-02-24 01:37:52,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:52,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773359811] [2022-02-24 01:37:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:52,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:52,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:52,081 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:52,081 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:52,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:52,163 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:52,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773359811] [2022-02-24 01:37:52,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [773359811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:52,163 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:52,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:37:52,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142715815] [2022-02-24 01:37:52,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:52,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:37:52,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:37:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:37:52,164 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:52,302 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-02-24 01:37:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:37:52,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 01:37:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:52,303 INFO L225 Difference]: With dead ends: 68 [2022-02-24 01:37:52,303 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 01:37:52,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:37:52,303 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:52,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:52,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 01:37:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2022-02-24 01:37:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-02-24 01:37:52,317 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 22 [2022-02-24 01:37:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:52,317 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-02-24 01:37:52,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-02-24 01:37:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:37:52,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:52,318 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:52,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:37:52,318 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:52,319 INFO L85 PathProgramCache]: Analyzing trace with hash 603526314, now seen corresponding path program 14 times [2022-02-24 01:37:52,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:52,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067268591] [2022-02-24 01:37:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:52,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:52,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:52,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:52,322 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:52,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:52,380 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:52,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067268591] [2022-02-24 01:37:52,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067268591] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:52,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:52,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:37:52,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132000809] [2022-02-24 01:37:52,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:52,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:37:52,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:52,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:37:52,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:37:52,381 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:52,526 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2022-02-24 01:37:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:37:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 01:37:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:52,527 INFO L225 Difference]: With dead ends: 64 [2022-02-24 01:37:52,527 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 01:37:52,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:37:52,528 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:52,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:52,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 01:37:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2022-02-24 01:37:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2022-02-24 01:37:52,540 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 22 [2022-02-24 01:37:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:52,540 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2022-02-24 01:37:52,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2022-02-24 01:37:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:37:52,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:52,541 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:52,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:37:52,541 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:52,541 INFO L85 PathProgramCache]: Analyzing trace with hash -119556723, now seen corresponding path program 15 times [2022-02-24 01:37:52,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:52,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197996128] [2022-02-24 01:37:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:52,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:52,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:52,544 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:52,544 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:52,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:52,634 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:52,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197996128] [2022-02-24 01:37:52,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197996128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:52,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:52,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:37:52,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008988431] [2022-02-24 01:37:52,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:52,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:37:52,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:52,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:37:52,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:37:52,635 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:52,781 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-02-24 01:37:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:37:52,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 01:37:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:52,781 INFO L225 Difference]: With dead ends: 58 [2022-02-24 01:37:52,782 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 01:37:52,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:37:52,785 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:52,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 01:37:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-02-24 01:37:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-24 01:37:52,800 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 24 [2022-02-24 01:37:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:52,800 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-24 01:37:52,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-24 01:37:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:37:52,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:52,801 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:52,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:37:52,801 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1214505715, now seen corresponding path program 16 times [2022-02-24 01:37:52,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:52,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742523230] [2022-02-24 01:37:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:52,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:52,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:52,805 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:52,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:52,887 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:52,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742523230] [2022-02-24 01:37:52,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [742523230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:52,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:52,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:37:52,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997158133] [2022-02-24 01:37:52,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:52,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:37:52,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:52,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:37:52,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:37:52,888 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:53,036 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-02-24 01:37:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:37:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 01:37:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:53,037 INFO L225 Difference]: With dead ends: 62 [2022-02-24 01:37:53,037 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 01:37:53,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:37:53,038 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:53,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:37:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 01:37:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-02-24 01:37:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-02-24 01:37:53,053 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 24 [2022-02-24 01:37:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:53,053 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-02-24 01:37:53,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-02-24 01:37:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:37:53,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:53,054 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:53,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:37:53,054 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:53,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1193499507, now seen corresponding path program 17 times [2022-02-24 01:37:53,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:53,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873404435] [2022-02-24 01:37:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:53,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:53,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:53,057 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:53,057 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:53,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:53,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:53,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873404435] [2022-02-24 01:37:53,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [873404435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:53,124 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:53,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:37:53,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248624906] [2022-02-24 01:37:53,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:53,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:37:53,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:37:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:37:53,126 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:53,286 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-02-24 01:37:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:37:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 01:37:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:53,287 INFO L225 Difference]: With dead ends: 68 [2022-02-24 01:37:53,287 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 01:37:53,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:37:53,288 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:53,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 01:37:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-02-24 01:37:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-02-24 01:37:53,304 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 24 [2022-02-24 01:37:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:53,304 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-02-24 01:37:53,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-02-24 01:37:53,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:37:53,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:53,305 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:53,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:37:53,305 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1813597197, now seen corresponding path program 18 times [2022-02-24 01:37:53,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:53,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354930499] [2022-02-24 01:37:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:53,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:53,308 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:53,308 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:53,308 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:53,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:53,381 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:53,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354930499] [2022-02-24 01:37:53,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354930499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:53,382 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:53,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:37:53,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971601117] [2022-02-24 01:37:53,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:53,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:37:53,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:37:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:37:53,383 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:53,573 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-02-24 01:37:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:37:53,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 01:37:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:53,574 INFO L225 Difference]: With dead ends: 74 [2022-02-24 01:37:53,574 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 01:37:53,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:37:53,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:53,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 23 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 01:37:53,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2022-02-24 01:37:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2022-02-24 01:37:53,595 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 24 [2022-02-24 01:37:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:53,595 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2022-02-24 01:37:53,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2022-02-24 01:37:53,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:37:53,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:53,596 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:53,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:37:53,596 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1120539533, now seen corresponding path program 19 times [2022-02-24 01:37:53,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:53,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072395326] [2022-02-24 01:37:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:53,600 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:53,600 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:53,600 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:53,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:53,679 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:53,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072395326] [2022-02-24 01:37:53,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072395326] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:53,679 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:53,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:37:53,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981045402] [2022-02-24 01:37:53,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:53,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:37:53,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:37:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:37:53,681 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:53,848 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-02-24 01:37:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:37:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 01:37:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:53,850 INFO L225 Difference]: With dead ends: 80 [2022-02-24 01:37:53,850 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 01:37:53,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:37:53,850 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:53,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 17 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:53,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 01:37:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2022-02-24 01:37:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-02-24 01:37:53,866 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 24 [2022-02-24 01:37:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:53,866 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-02-24 01:37:53,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-02-24 01:37:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:37:53,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:53,867 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:53,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:37:53,867 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:53,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:53,867 INFO L85 PathProgramCache]: Analyzing trace with hash 812055309, now seen corresponding path program 20 times [2022-02-24 01:37:53,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:53,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878718161] [2022-02-24 01:37:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:53,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:53,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:53,870 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:53,942 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:53,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878718161] [2022-02-24 01:37:53,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [878718161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:53,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:53,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:37:53,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592812086] [2022-02-24 01:37:53,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:53,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:37:53,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:53,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:37:53,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:37:53,943 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:54,100 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-02-24 01:37:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:37:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 01:37:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:54,101 INFO L225 Difference]: With dead ends: 74 [2022-02-24 01:37:54,101 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 01:37:54,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:37:54,102 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:54,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 01:37:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2022-02-24 01:37:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-02-24 01:37:54,116 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 24 [2022-02-24 01:37:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:54,116 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-02-24 01:37:54,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-02-24 01:37:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:37:54,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:54,117 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:54,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:37:54,117 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:54,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:54,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1486059600, now seen corresponding path program 21 times [2022-02-24 01:37:54,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:54,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372157447] [2022-02-24 01:37:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:54,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:54,120 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:54,120 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:54,120 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:54,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:54,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:54,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372157447] [2022-02-24 01:37:54,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1372157447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:54,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:54,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:37:54,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656631271] [2022-02-24 01:37:54,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:54,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:37:54,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:54,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:37:54,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:37:54,207 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:54,364 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2022-02-24 01:37:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:37:54,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 01:37:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:54,365 INFO L225 Difference]: With dead ends: 64 [2022-02-24 01:37:54,365 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 01:37:54,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:37:54,366 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:54,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 19 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:54,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 01:37:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-02-24 01:37:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-02-24 01:37:54,382 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 26 [2022-02-24 01:37:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:54,382 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-02-24 01:37:54,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-02-24 01:37:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:37:54,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:54,382 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:54,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:37:54,383 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1713958704, now seen corresponding path program 22 times [2022-02-24 01:37:54,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:54,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249765816] [2022-02-24 01:37:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:54,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:54,387 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:54,388 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:54,388 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:54,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:54,462 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:54,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249765816] [2022-02-24 01:37:54,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [249765816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:54,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:54,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:37:54,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384851095] [2022-02-24 01:37:54,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:54,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:37:54,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:54,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:37:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:37:54,472 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:54,639 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-02-24 01:37:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:37:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 01:37:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:54,640 INFO L225 Difference]: With dead ends: 68 [2022-02-24 01:37:54,640 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 01:37:54,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:37:54,641 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:54,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 01:37:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-02-24 01:37:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-02-24 01:37:54,659 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 26 [2022-02-24 01:37:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:54,660 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-02-24 01:37:54,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-02-24 01:37:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:37:54,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:54,660 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:54,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:37:54,660 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:54,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1734964912, now seen corresponding path program 23 times [2022-02-24 01:37:54,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:54,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355040828] [2022-02-24 01:37:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:54,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:54,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:54,663 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:54,663 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:54,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:54,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:54,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355040828] [2022-02-24 01:37:54,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [355040828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:54,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:54,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:37:54,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794488109] [2022-02-24 01:37:54,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:54,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:37:54,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:54,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:37:54,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:37:54,744 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:54,925 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-02-24 01:37:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:37:54,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 01:37:54,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:54,926 INFO L225 Difference]: With dead ends: 74 [2022-02-24 01:37:54,926 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 01:37:54,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:37:54,927 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:54,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 01:37:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2022-02-24 01:37:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-02-24 01:37:54,946 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 26 [2022-02-24 01:37:54,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:54,946 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-02-24 01:37:54,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:54,946 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-02-24 01:37:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:37:54,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:54,946 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:54,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:37:54,947 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash 447094320, now seen corresponding path program 24 times [2022-02-24 01:37:54,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:54,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607232046] [2022-02-24 01:37:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:54,950 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:54,950 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:54,950 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:55,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:55,037 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:55,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607232046] [2022-02-24 01:37:55,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [607232046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:55,037 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:55,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:37:55,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563608403] [2022-02-24 01:37:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:55,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:37:55,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:37:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:37:55,039 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:55,218 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-02-24 01:37:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:37:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 01:37:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:55,219 INFO L225 Difference]: With dead ends: 80 [2022-02-24 01:37:55,219 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 01:37:55,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:37:55,220 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:55,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:55,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 01:37:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2022-02-24 01:37:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2022-02-24 01:37:55,240 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 26 [2022-02-24 01:37:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:55,240 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2022-02-24 01:37:55,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2022-02-24 01:37:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:37:55,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:55,241 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:55,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:37:55,241 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:55,241 INFO L85 PathProgramCache]: Analyzing trace with hash -245963344, now seen corresponding path program 25 times [2022-02-24 01:37:55,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:55,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009996001] [2022-02-24 01:37:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:55,244 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:55,244 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:55,244 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:55,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:55,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:55,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009996001] [2022-02-24 01:37:55,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2009996001] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:55,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:55,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:37:55,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752247445] [2022-02-24 01:37:55,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:55,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:37:55,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:55,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:37:55,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:37:55,324 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:55,511 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-02-24 01:37:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:37:55,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 01:37:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:55,512 INFO L225 Difference]: With dead ends: 86 [2022-02-24 01:37:55,512 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 01:37:55,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:37:55,513 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:55,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 01:37:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2022-02-24 01:37:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-02-24 01:37:55,535 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 26 [2022-02-24 01:37:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:55,535 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-02-24 01:37:55,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-02-24 01:37:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:37:55,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:55,535 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:55,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:37:55,536 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash -554447568, now seen corresponding path program 26 times [2022-02-24 01:37:55,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:55,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18668179] [2022-02-24 01:37:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:55,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:55,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:55,539 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:55,539 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:55,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:55,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18668179] [2022-02-24 01:37:55,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [18668179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:55,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:55,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:37:55,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332387489] [2022-02-24 01:37:55,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:55,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:37:55,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:55,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:37:55,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:37:55,624 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:55,807 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-24 01:37:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:37:55,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 01:37:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:55,808 INFO L225 Difference]: With dead ends: 92 [2022-02-24 01:37:55,808 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 01:37:55,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:37:55,809 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:55,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 01:37:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2022-02-24 01:37:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-02-24 01:37:55,828 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 26 [2022-02-24 01:37:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:55,828 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-02-24 01:37:55,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-02-24 01:37:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:37:55,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:55,829 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:55,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:37:55,829 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash -655043408, now seen corresponding path program 27 times [2022-02-24 01:37:55,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:55,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643416703] [2022-02-24 01:37:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:55,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:55,833 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:55,833 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:55,833 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:55,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:55,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:55,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643416703] [2022-02-24 01:37:55,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643416703] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:55,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:55,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:37:55,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262597167] [2022-02-24 01:37:55,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:55,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:37:55,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:55,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:37:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:37:55,912 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:56,096 INFO L93 Difference]: Finished difference Result 84 states and 116 transitions. [2022-02-24 01:37:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:37:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 01:37:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:56,097 INFO L225 Difference]: With dead ends: 84 [2022-02-24 01:37:56,097 INFO L226 Difference]: Without dead ends: 78 [2022-02-24 01:37:56,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:37:56,098 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:56,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 21 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-24 01:37:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2022-02-24 01:37:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2022-02-24 01:37:56,117 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 26 [2022-02-24 01:37:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:56,118 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2022-02-24 01:37:56,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2022-02-24 01:37:56,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:37:56,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:56,118 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:56,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:37:56,118 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:56,119 INFO L85 PathProgramCache]: Analyzing trace with hash -435331821, now seen corresponding path program 28 times [2022-02-24 01:37:56,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:56,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964601562] [2022-02-24 01:37:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:56,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:56,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:56,121 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:56,122 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:56,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:56,226 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:56,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964601562] [2022-02-24 01:37:56,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964601562] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:56,227 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:56,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:37:56,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068783705] [2022-02-24 01:37:56,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:56,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:37:56,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:56,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:37:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:56,228 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:56,442 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2022-02-24 01:37:56,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:37:56,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:37:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:56,443 INFO L225 Difference]: With dead ends: 70 [2022-02-24 01:37:56,443 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 01:37:56,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:37:56,444 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:56,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 01:37:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-02-24 01:37:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-02-24 01:37:56,474 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 28 [2022-02-24 01:37:56,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:56,474 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-02-24 01:37:56,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-02-24 01:37:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:37:56,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:56,475 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:56,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:37:56,475 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1530280813, now seen corresponding path program 29 times [2022-02-24 01:37:56,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:56,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034177509] [2022-02-24 01:37:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:56,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:56,479 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:56,479 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:56,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:56,584 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:56,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034177509] [2022-02-24 01:37:56,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034177509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:56,584 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:56,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:37:56,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117299504] [2022-02-24 01:37:56,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:56,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:37:56,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:56,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:37:56,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:56,585 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:56,793 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-02-24 01:37:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:37:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:37:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:56,794 INFO L225 Difference]: With dead ends: 74 [2022-02-24 01:37:56,794 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 01:37:56,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:37:56,795 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:56,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 15 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 01:37:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-02-24 01:37:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:56,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-02-24 01:37:56,814 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 28 [2022-02-24 01:37:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:56,815 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-02-24 01:37:56,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-02-24 01:37:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:37:56,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:56,815 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:56,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:37:56,815 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1509274605, now seen corresponding path program 30 times [2022-02-24 01:37:56,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:56,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197931472] [2022-02-24 01:37:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:56,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:56,818 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:56,818 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:56,818 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:56,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:56,907 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:56,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197931472] [2022-02-24 01:37:56,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197931472] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:56,907 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:56,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:37:56,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304964494] [2022-02-24 01:37:56,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:56,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:37:56,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:56,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:37:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:56,908 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:57,090 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-02-24 01:37:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:37:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:37:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:57,090 INFO L225 Difference]: With dead ends: 80 [2022-02-24 01:37:57,090 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 01:37:57,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:37:57,091 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:57,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 01:37:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2022-02-24 01:37:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-02-24 01:37:57,109 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 28 [2022-02-24 01:37:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:57,109 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-02-24 01:37:57,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-02-24 01:37:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:37:57,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:57,110 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:57,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:37:57,110 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1497822099, now seen corresponding path program 31 times [2022-02-24 01:37:57,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:57,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704213802] [2022-02-24 01:37:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:57,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:57,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:57,112 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:57,112 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:57,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:57,202 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:57,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704213802] [2022-02-24 01:37:57,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [704213802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:57,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:57,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:37:57,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243764844] [2022-02-24 01:37:57,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:57,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:37:57,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:37:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:57,204 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:57,398 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-02-24 01:37:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:37:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:37:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:57,399 INFO L225 Difference]: With dead ends: 86 [2022-02-24 01:37:57,399 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 01:37:57,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:37:57,400 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:57,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 01:37:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2022-02-24 01:37:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-02-24 01:37:57,426 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 28 [2022-02-24 01:37:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:57,426 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-02-24 01:37:57,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-02-24 01:37:57,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:37:57,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:57,426 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:57,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:37:57,427 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 804764435, now seen corresponding path program 32 times [2022-02-24 01:37:57,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:57,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609633955] [2022-02-24 01:37:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:57,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:57,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:57,430 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:57,430 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:57,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:57,519 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:57,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609633955] [2022-02-24 01:37:57,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1609633955] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:57,519 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:57,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:37:57,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609326380] [2022-02-24 01:37:57,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:57,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:37:57,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:37:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:57,520 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:57,691 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-24 01:37:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:37:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:37:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:57,692 INFO L225 Difference]: With dead ends: 92 [2022-02-24 01:37:57,692 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 01:37:57,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:37:57,693 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:57,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 01:37:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2022-02-24 01:37:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2022-02-24 01:37:57,712 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 28 [2022-02-24 01:37:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:57,713 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2022-02-24 01:37:57,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2022-02-24 01:37:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:37:57,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:57,713 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:57,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:37:57,713 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 496280211, now seen corresponding path program 33 times [2022-02-24 01:37:57,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:57,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919727947] [2022-02-24 01:37:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:57,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:57,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:57,716 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:57,716 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:57,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:57,805 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:57,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919727947] [2022-02-24 01:37:57,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1919727947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:57,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:57,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:37:57,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373250931] [2022-02-24 01:37:57,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:57,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:37:57,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:37:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:57,806 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:57,993 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-24 01:37:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:37:57,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:37:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:57,995 INFO L225 Difference]: With dead ends: 98 [2022-02-24 01:37:57,995 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 01:37:57,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:37:57,997 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:57,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 01:37:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2022-02-24 01:37:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-02-24 01:37:58,017 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 28 [2022-02-24 01:37:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:58,017 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-02-24 01:37:58,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-02-24 01:37:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:37:58,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:58,018 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:58,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:37:58,018 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:58,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:58,019 INFO L85 PathProgramCache]: Analyzing trace with hash 395684371, now seen corresponding path program 34 times [2022-02-24 01:37:58,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:58,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066383506] [2022-02-24 01:37:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:58,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:58,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:58,021 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:58,021 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:58,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:58,110 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:58,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066383506] [2022-02-24 01:37:58,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066383506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:58,110 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:58,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:37:58,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340905304] [2022-02-24 01:37:58,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:58,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:37:58,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:37:58,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:58,111 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:58,294 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-24 01:37:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:37:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:37:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:58,295 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:37:58,295 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 01:37:58,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:37:58,296 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:58,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 01:37:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2022-02-24 01:37:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-02-24 01:37:58,315 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 28 [2022-02-24 01:37:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:58,315 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-02-24 01:37:58,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-02-24 01:37:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:37:58,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:58,315 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:58,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:37:58,316 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:58,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:58,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1787637357, now seen corresponding path program 35 times [2022-02-24 01:37:58,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:58,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877226216] [2022-02-24 01:37:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:58,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:58,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:58,318 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:58,318 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:58,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:58,407 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:58,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877226216] [2022-02-24 01:37:58,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877226216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:58,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:58,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:37:58,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467575313] [2022-02-24 01:37:58,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:58,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:37:58,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:58,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:37:58,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:37:58,409 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:58,596 INFO L93 Difference]: Finished difference Result 94 states and 131 transitions. [2022-02-24 01:37:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:37:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:37:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:58,597 INFO L225 Difference]: With dead ends: 94 [2022-02-24 01:37:58,597 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 01:37:58,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:37:58,597 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:58,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 15 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 01:37:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2022-02-24 01:37:58,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2022-02-24 01:37:58,618 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 28 [2022-02-24 01:37:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:58,618 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2022-02-24 01:37:58,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2022-02-24 01:37:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:37:58,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:58,618 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:58,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:37:58,619 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:58,619 INFO L85 PathProgramCache]: Analyzing trace with hash -3250762, now seen corresponding path program 36 times [2022-02-24 01:37:58,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:58,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377061832] [2022-02-24 01:37:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:58,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:58,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:58,621 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:58,621 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:58,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:58,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:58,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377061832] [2022-02-24 01:37:58,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [377061832] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:58,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:58,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:37:58,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298544437] [2022-02-24 01:37:58,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:58,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:37:58,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:58,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:37:58,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:37:58,727 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:58,920 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2022-02-24 01:37:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:37:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:37:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:58,921 INFO L225 Difference]: With dead ends: 76 [2022-02-24 01:37:58,921 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 01:37:58,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:37:58,922 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:58,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 21 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 01:37:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-02-24 01:37:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-02-24 01:37:58,953 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 30 [2022-02-24 01:37:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:58,953 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-02-24 01:37:58,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-02-24 01:37:58,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:37:58,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:58,953 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:58,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:37:58,954 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1098199754, now seen corresponding path program 37 times [2022-02-24 01:37:58,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:58,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256738048] [2022-02-24 01:37:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:58,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:58,956 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:58,956 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:59,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:59,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:59,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256738048] [2022-02-24 01:37:59,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [256738048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:59,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:59,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:37:59,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450213486] [2022-02-24 01:37:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:59,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:37:59,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:37:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:37:59,056 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:59,289 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-02-24 01:37:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:37:59,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:37:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:59,290 INFO L225 Difference]: With dead ends: 80 [2022-02-24 01:37:59,290 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 01:37:59,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:37:59,291 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:59,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 01:37:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-02-24 01:37:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2022-02-24 01:37:59,313 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 30 [2022-02-24 01:37:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:59,313 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2022-02-24 01:37:59,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2022-02-24 01:37:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:37:59,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:59,314 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:59,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:37:59,314 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1077193546, now seen corresponding path program 38 times [2022-02-24 01:37:59,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:59,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321064099] [2022-02-24 01:37:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:59,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:59,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:59,317 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:59,317 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:59,411 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:59,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321064099] [2022-02-24 01:37:59,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1321064099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:59,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:59,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:37:59,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4335548] [2022-02-24 01:37:59,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:59,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:37:59,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:59,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:37:59,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:37:59,412 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:59,598 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-02-24 01:37:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:37:59,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:37:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:59,599 INFO L225 Difference]: With dead ends: 86 [2022-02-24 01:37:59,599 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 01:37:59,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:37:59,600 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:59,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 01:37:59,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2022-02-24 01:37:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-02-24 01:37:59,621 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 30 [2022-02-24 01:37:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:59,621 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-02-24 01:37:59,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-02-24 01:37:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:37:59,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:59,622 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:59,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:37:59,622 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1929903158, now seen corresponding path program 39 times [2022-02-24 01:37:59,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:59,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645321169] [2022-02-24 01:37:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:59,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:59,625 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:59,625 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:59,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:37:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:37:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:37:59,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:37:59,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645321169] [2022-02-24 01:37:59,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [645321169] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:37:59,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:37:59,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:37:59,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307508025] [2022-02-24 01:37:59,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:37:59,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:37:59,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:37:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:37:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:37:59,716 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:37:59,910 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-24 01:37:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:37:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:37:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:37:59,911 INFO L225 Difference]: With dead ends: 92 [2022-02-24 01:37:59,911 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 01:37:59,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:37:59,912 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:37:59,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:37:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 01:37:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2022-02-24 01:37:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-02-24 01:37:59,937 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 30 [2022-02-24 01:37:59,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:37:59,937 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-02-24 01:37:59,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:37:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-02-24 01:37:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:37:59,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:37:59,937 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:37:59,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:37:59,938 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:37:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:37:59,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1236845494, now seen corresponding path program 40 times [2022-02-24 01:37:59,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:37:59,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730161229] [2022-02-24 01:37:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:37:59,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:37:59,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:37:59,940 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:37:59,940 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:37:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:00,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:00,039 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:00,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730161229] [2022-02-24 01:38:00,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [730161229] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:00,040 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:00,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:38:00,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469561820] [2022-02-24 01:38:00,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:00,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:38:00,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:00,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:38:00,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:38:00,042 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:00,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:00,253 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-24 01:38:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:38:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:38:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:00,254 INFO L225 Difference]: With dead ends: 98 [2022-02-24 01:38:00,254 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 01:38:00,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:38:00,254 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:00,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 01:38:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2022-02-24 01:38:00,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2022-02-24 01:38:00,277 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 30 [2022-02-24 01:38:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:00,278 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2022-02-24 01:38:00,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2022-02-24 01:38:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:38:00,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:00,278 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:00,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:38:00,279 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:00,279 INFO L85 PathProgramCache]: Analyzing trace with hash 928361270, now seen corresponding path program 41 times [2022-02-24 01:38:00,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:00,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832293957] [2022-02-24 01:38:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:00,281 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:00,281 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:00,281 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:00,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:00,376 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:00,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832293957] [2022-02-24 01:38:00,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [832293957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:00,377 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:00,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:38:00,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846623629] [2022-02-24 01:38:00,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:00,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:38:00,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:38:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:38:00,378 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:00,595 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-24 01:38:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:38:00,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:38:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:00,596 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:38:00,596 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 01:38:00,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:38:00,597 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:00,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:00,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 01:38:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 77. [2022-02-24 01:38:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-02-24 01:38:00,622 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 30 [2022-02-24 01:38:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:00,623 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-02-24 01:38:00,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-02-24 01:38:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:38:00,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:00,623 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:00,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:38:00,624 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:00,624 INFO L85 PathProgramCache]: Analyzing trace with hash 827765430, now seen corresponding path program 42 times [2022-02-24 01:38:00,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:00,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591001035] [2022-02-24 01:38:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:00,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:00,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:00,626 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:00,626 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:00,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:00,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:00,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591001035] [2022-02-24 01:38:00,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [591001035] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:00,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:00,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:38:00,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621673109] [2022-02-24 01:38:00,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:00,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:38:00,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:00,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:38:00,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:38:00,734 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:00,947 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-24 01:38:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:38:00,947 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:38:00,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:00,948 INFO L225 Difference]: With dead ends: 110 [2022-02-24 01:38:00,948 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 01:38:00,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:38:00,948 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:00,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 01:38:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2022-02-24 01:38:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-02-24 01:38:00,971 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 30 [2022-02-24 01:38:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:00,971 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-02-24 01:38:00,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-02-24 01:38:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:38:00,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:00,972 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:00,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:38:00,972 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:00,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1355556298, now seen corresponding path program 43 times [2022-02-24 01:38:00,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:00,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626008069] [2022-02-24 01:38:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:00,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:00,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:00,974 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:00,974 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:01,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:01,074 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:01,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626008069] [2022-02-24 01:38:01,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1626008069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:01,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:01,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:38:01,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161840313] [2022-02-24 01:38:01,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:01,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:38:01,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:38:01,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:38:01,075 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:01,318 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-24 01:38:01,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:38:01,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:38:01,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:01,319 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:38:01,319 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 01:38:01,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:38:01,320 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:01,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 15 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 01:38:01,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2022-02-24 01:38:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-02-24 01:38:01,374 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 30 [2022-02-24 01:38:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:01,375 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-02-24 01:38:01,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-02-24 01:38:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:38:01,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:01,375 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:01,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:38:01,375 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash 711270838, now seen corresponding path program 44 times [2022-02-24 01:38:01,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:01,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515667654] [2022-02-24 01:38:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:01,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:01,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:01,378 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:01,378 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:01,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:01,474 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:01,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515667654] [2022-02-24 01:38:01,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [515667654] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:01,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:01,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:38:01,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721441125] [2022-02-24 01:38:01,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:01,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:38:01,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:01,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:38:01,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:38:01,475 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:01,682 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-24 01:38:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:38:01,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:38:01,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:01,683 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:38:01,683 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 01:38:01,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:38:01,684 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:01,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 21 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:01,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 01:38:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 67. [2022-02-24 01:38:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-02-24 01:38:01,709 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 30 [2022-02-24 01:38:01,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:01,709 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-02-24 01:38:01,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-02-24 01:38:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:01,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:01,709 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:01,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:38:01,710 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:01,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:01,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1385180775, now seen corresponding path program 45 times [2022-02-24 01:38:01,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:01,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450641681] [2022-02-24 01:38:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:01,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:01,712 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:01,712 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:01,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:01,818 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:01,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450641681] [2022-02-24 01:38:01,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450641681] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:01,818 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:01,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:01,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813971153] [2022-02-24 01:38:01,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:01,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:01,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:01,819 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:02,048 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2022-02-24 01:38:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:02,049 INFO L225 Difference]: With dead ends: 82 [2022-02-24 01:38:02,049 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 01:38:02,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:02,050 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:02,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 17 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 01:38:02,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-02-24 01:38:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-02-24 01:38:02,079 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 32 [2022-02-24 01:38:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:02,080 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-02-24 01:38:02,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-02-24 01:38:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:02,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:02,080 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:02,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:38:02,081 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1814837529, now seen corresponding path program 46 times [2022-02-24 01:38:02,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:02,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412837745] [2022-02-24 01:38:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:02,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:02,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:02,084 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:02,084 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:02,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:02,193 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:02,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412837745] [2022-02-24 01:38:02,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412837745] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:02,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:02,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:02,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888379896] [2022-02-24 01:38:02,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:02,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:02,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:02,195 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:02,458 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-02-24 01:38:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:02,458 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:02,458 INFO L225 Difference]: With dead ends: 86 [2022-02-24 01:38:02,459 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 01:38:02,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:02,459 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:02,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 01:38:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-02-24 01:38:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2022-02-24 01:38:02,483 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 32 [2022-02-24 01:38:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:02,483 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2022-02-24 01:38:02,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2022-02-24 01:38:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:02,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:02,484 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:02,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 01:38:02,484 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1835843737, now seen corresponding path program 47 times [2022-02-24 01:38:02,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:02,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942306263] [2022-02-24 01:38:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:02,487 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:02,487 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:02,487 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:02,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:02,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:02,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942306263] [2022-02-24 01:38:02,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942306263] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:02,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:02,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:02,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895238651] [2022-02-24 01:38:02,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:02,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:02,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:02,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:02,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:02,600 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:02,875 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-24 01:38:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:02,877 INFO L225 Difference]: With dead ends: 92 [2022-02-24 01:38:02,877 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 01:38:02,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:02,878 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:02,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 23 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 01:38:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2022-02-24 01:38:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-02-24 01:38:02,912 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 32 [2022-02-24 01:38:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:02,912 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-02-24 01:38:02,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-02-24 01:38:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:02,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:02,913 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:02,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 01:38:02,913 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:02,913 INFO L85 PathProgramCache]: Analyzing trace with hash 547973145, now seen corresponding path program 48 times [2022-02-24 01:38:02,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:02,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99239052] [2022-02-24 01:38:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:02,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:02,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:02,917 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:02,917 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:03,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:03,038 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:03,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99239052] [2022-02-24 01:38:03,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [99239052] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:03,038 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:03,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:03,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289748040] [2022-02-24 01:38:03,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:03,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:03,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:03,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:03,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:03,039 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:03,323 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-24 01:38:03,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:03,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:03,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:03,325 INFO L225 Difference]: With dead ends: 98 [2022-02-24 01:38:03,325 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 01:38:03,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:03,326 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:03,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 01:38:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2022-02-24 01:38:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-02-24 01:38:03,363 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 32 [2022-02-24 01:38:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:03,363 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-02-24 01:38:03,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-02-24 01:38:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:03,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:03,364 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:03,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 01:38:03,364 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash -145084519, now seen corresponding path program 49 times [2022-02-24 01:38:03,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:03,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255178706] [2022-02-24 01:38:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:03,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:03,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:03,367 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:03,367 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:03,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:03,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:03,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255178706] [2022-02-24 01:38:03,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [255178706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:03,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:03,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:03,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905567747] [2022-02-24 01:38:03,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:03,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:03,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:03,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:03,477 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:03,719 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-24 01:38:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:03,720 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:38:03,720 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 01:38:03,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:03,721 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:03,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 21 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 01:38:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-02-24 01:38:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-02-24 01:38:03,751 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 32 [2022-02-24 01:38:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:03,751 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-02-24 01:38:03,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-02-24 01:38:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:03,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:03,751 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:03,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 01:38:03,752 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash -453568743, now seen corresponding path program 50 times [2022-02-24 01:38:03,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:03,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143602552] [2022-02-24 01:38:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:03,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:03,755 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:03,758 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:03,759 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:03,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:03,874 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:03,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143602552] [2022-02-24 01:38:03,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [143602552] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:03,874 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:03,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:03,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965361379] [2022-02-24 01:38:03,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:03,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:03,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:03,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:03,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:03,875 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:04,105 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-24 01:38:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:04,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:04,106 INFO L225 Difference]: With dead ends: 110 [2022-02-24 01:38:04,106 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 01:38:04,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:04,107 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:04,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 01:38:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2022-02-24 01:38:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-02-24 01:38:04,137 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 32 [2022-02-24 01:38:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:04,137 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-02-24 01:38:04,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-02-24 01:38:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:04,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:04,137 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:04,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 01:38:04,138 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:04,138 INFO L85 PathProgramCache]: Analyzing trace with hash -554164583, now seen corresponding path program 51 times [2022-02-24 01:38:04,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:04,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108085684] [2022-02-24 01:38:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:04,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:04,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:04,141 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:04,141 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:04,249 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:04,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108085684] [2022-02-24 01:38:04,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [108085684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:04,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:04,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:04,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384089169] [2022-02-24 01:38:04,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:04,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:04,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:04,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:04,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:04,251 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:04,472 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-24 01:38:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:04,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:04,473 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:38:04,473 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 01:38:04,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:04,474 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:04,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 01:38:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2022-02-24 01:38:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-02-24 01:38:04,511 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 32 [2022-02-24 01:38:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:04,511 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-02-24 01:38:04,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-02-24 01:38:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:04,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:04,512 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:04,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 01:38:04,512 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1557480985, now seen corresponding path program 52 times [2022-02-24 01:38:04,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:04,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240307925] [2022-02-24 01:38:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:04,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:04,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:04,515 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:04,515 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:04,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:04,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:04,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240307925] [2022-02-24 01:38:04,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240307925] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:04,625 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:04,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:04,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437212877] [2022-02-24 01:38:04,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:04,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:04,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:04,626 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:04,848 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-24 01:38:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:04,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:04,849 INFO L225 Difference]: With dead ends: 122 [2022-02-24 01:38:04,849 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 01:38:04,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:04,849 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:04,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 01:38:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2022-02-24 01:38:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-02-24 01:38:04,877 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 32 [2022-02-24 01:38:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:04,877 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-02-24 01:38:04,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-02-24 01:38:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:04,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:04,877 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:04,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 01:38:04,878 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash -670659175, now seen corresponding path program 53 times [2022-02-24 01:38:04,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:04,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138080434] [2022-02-24 01:38:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:04,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:04,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:04,880 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:04,880 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:04,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:04,986 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:04,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138080434] [2022-02-24 01:38:04,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2138080434] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:04,986 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:04,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:04,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946461699] [2022-02-24 01:38:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:04,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:04,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:04,987 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:05,210 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-24 01:38:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:05,211 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:38:05,211 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:38:05,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:05,211 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:05,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:38:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2022-02-24 01:38:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-02-24 01:38:05,242 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 32 [2022-02-24 01:38:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:05,242 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-02-24 01:38:05,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-02-24 01:38:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:38:05,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:05,243 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:05,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 01:38:05,243 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:05,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1275327769, now seen corresponding path program 54 times [2022-02-24 01:38:05,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:05,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295011568] [2022-02-24 01:38:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:05,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:05,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:05,245 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:05,245 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:05,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:05,362 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:05,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295011568] [2022-02-24 01:38:05,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1295011568] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:05,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:05,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:38:05,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912590259] [2022-02-24 01:38:05,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:05,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:38:05,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:05,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:38:05,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:38:05,363 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:05,624 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2022-02-24 01:38:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:38:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:38:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:05,625 INFO L225 Difference]: With dead ends: 114 [2022-02-24 01:38:05,625 INFO L226 Difference]: Without dead ends: 108 [2022-02-24 01:38:05,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:38:05,626 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:05,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-24 01:38:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2022-02-24 01:38:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-02-24 01:38:05,652 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 32 [2022-02-24 01:38:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:05,652 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-02-24 01:38:05,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-02-24 01:38:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:05,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:05,653 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:05,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 01:38:05,653 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2019938492, now seen corresponding path program 55 times [2022-02-24 01:38:05,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:05,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802409931] [2022-02-24 01:38:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:05,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:05,655 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:05,656 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:05,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:05,781 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:05,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802409931] [2022-02-24 01:38:05,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1802409931] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:05,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:05,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:05,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960098210] [2022-02-24 01:38:05,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:05,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:05,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:05,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:05,783 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:06,087 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2022-02-24 01:38:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:06,088 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:06,088 INFO L225 Difference]: With dead ends: 88 [2022-02-24 01:38:06,089 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 01:38:06,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:06,089 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:06,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 21 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 01:38:06,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-02-24 01:38:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-02-24 01:38:06,124 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 34 [2022-02-24 01:38:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:06,125 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-02-24 01:38:06,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-02-24 01:38:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:06,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:06,125 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:06,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 01:38:06,126 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash 924989500, now seen corresponding path program 56 times [2022-02-24 01:38:06,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:06,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37062364] [2022-02-24 01:38:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:06,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:06,129 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:06,129 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:06,129 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:06,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:06,254 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:06,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37062364] [2022-02-24 01:38:06,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [37062364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:06,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:06,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:06,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123211163] [2022-02-24 01:38:06,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:06,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:06,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:06,256 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:06,514 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-24 01:38:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:06,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:06,515 INFO L225 Difference]: With dead ends: 92 [2022-02-24 01:38:06,515 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 01:38:06,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:06,515 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:06,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 23 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 01:38:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-02-24 01:38:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-02-24 01:38:06,542 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 34 [2022-02-24 01:38:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:06,542 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-02-24 01:38:06,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-02-24 01:38:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:06,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:06,543 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:06,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 01:38:06,543 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:06,543 INFO L85 PathProgramCache]: Analyzing trace with hash 945995708, now seen corresponding path program 57 times [2022-02-24 01:38:06,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:06,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655398490] [2022-02-24 01:38:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:06,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:06,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:06,546 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:06,546 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:06,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:06,655 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:06,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655398490] [2022-02-24 01:38:06,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655398490] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:06,655 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:06,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:06,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731099827] [2022-02-24 01:38:06,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:06,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:06,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:06,656 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:06,906 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-24 01:38:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:06,906 INFO L225 Difference]: With dead ends: 98 [2022-02-24 01:38:06,906 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 01:38:06,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:06,907 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:06,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 23 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 01:38:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2022-02-24 01:38:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-02-24 01:38:06,934 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 34 [2022-02-24 01:38:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:06,934 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-02-24 01:38:06,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-02-24 01:38:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:06,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:06,935 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:06,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 01:38:06,935 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash -341874884, now seen corresponding path program 58 times [2022-02-24 01:38:06,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:06,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655994985] [2022-02-24 01:38:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:06,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:06,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:06,937 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:06,937 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:07,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:07,074 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:07,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655994985] [2022-02-24 01:38:07,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [655994985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:07,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:07,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:07,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74416350] [2022-02-24 01:38:07,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:07,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:07,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:07,075 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:07,353 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-24 01:38:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:07,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:07,354 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:38:07,354 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 01:38:07,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:07,355 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:07,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 21 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 01:38:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2022-02-24 01:38:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-02-24 01:38:07,399 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 34 [2022-02-24 01:38:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:07,399 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-02-24 01:38:07,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-02-24 01:38:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:07,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:07,400 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:07,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 01:38:07,400 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1034932548, now seen corresponding path program 59 times [2022-02-24 01:38:07,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:07,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320811282] [2022-02-24 01:38:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:07,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:07,403 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:07,403 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:07,403 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:07,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:07,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:07,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320811282] [2022-02-24 01:38:07,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [320811282] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:07,513 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:07,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:07,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715344719] [2022-02-24 01:38:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:07,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:07,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:07,514 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:07,753 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-24 01:38:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:07,754 INFO L225 Difference]: With dead ends: 110 [2022-02-24 01:38:07,754 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 01:38:07,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:07,755 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:07,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 01:38:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2022-02-24 01:38:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-02-24 01:38:07,786 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 34 [2022-02-24 01:38:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:07,786 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-02-24 01:38:07,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-02-24 01:38:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:07,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:07,787 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:07,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 01:38:07,787 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:07,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:07,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1343416772, now seen corresponding path program 60 times [2022-02-24 01:38:07,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:07,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032038404] [2022-02-24 01:38:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:07,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:07,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:07,790 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:07,790 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:07,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:07,900 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:07,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032038404] [2022-02-24 01:38:07,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032038404] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:07,900 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:07,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:07,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373454845] [2022-02-24 01:38:07,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:07,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:07,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:07,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:07,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:07,901 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:08,166 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-24 01:38:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:08,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:08,167 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:38:08,167 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 01:38:08,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:08,168 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:08,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 01:38:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2022-02-24 01:38:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-02-24 01:38:08,215 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 34 [2022-02-24 01:38:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:08,215 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-02-24 01:38:08,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-02-24 01:38:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:08,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:08,216 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:08,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 01:38:08,216 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:08,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1444012612, now seen corresponding path program 61 times [2022-02-24 01:38:08,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:08,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425112290] [2022-02-24 01:38:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:08,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:08,219 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:08,219 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:08,219 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:08,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:08,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:08,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425112290] [2022-02-24 01:38:08,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425112290] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:08,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:08,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:08,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482257507] [2022-02-24 01:38:08,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:08,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:08,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:08,347 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:08,658 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-24 01:38:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:08,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:08,659 INFO L225 Difference]: With dead ends: 122 [2022-02-24 01:38:08,659 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 01:38:08,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:08,659 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:08,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 01:38:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2022-02-24 01:38:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-02-24 01:38:08,693 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 34 [2022-02-24 01:38:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:08,693 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-02-24 01:38:08,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-02-24 01:38:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:08,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:08,694 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:08,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 01:38:08,694 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 667632956, now seen corresponding path program 62 times [2022-02-24 01:38:08,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:08,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145425279] [2022-02-24 01:38:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:08,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:08,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:08,697 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:08,697 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:08,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:08,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:08,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145425279] [2022-02-24 01:38:08,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145425279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:08,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:08,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:08,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818010052] [2022-02-24 01:38:08,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:08,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:08,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:08,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:08,818 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:09,132 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-24 01:38:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:09,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:09,133 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:38:09,133 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:38:09,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:09,134 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:09,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 15 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:38:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2022-02-24 01:38:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-02-24 01:38:09,183 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 34 [2022-02-24 01:38:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:09,183 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-02-24 01:38:09,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-02-24 01:38:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:09,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:09,184 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:09,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 01:38:09,184 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1560507204, now seen corresponding path program 63 times [2022-02-24 01:38:09,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:09,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105249519] [2022-02-24 01:38:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:09,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:09,186 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:09,186 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:09,186 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:09,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:09,313 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:09,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105249519] [2022-02-24 01:38:09,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [105249519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:09,313 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:09,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:09,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176735476] [2022-02-24 01:38:09,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:09,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:09,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:09,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:09,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:09,314 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:09,632 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-24 01:38:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:09,633 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:38:09,633 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:38:09,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:09,633 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:09,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 21 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:38:09,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2022-02-24 01:38:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-02-24 01:38:09,675 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 34 [2022-02-24 01:38:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:09,675 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-02-24 01:38:09,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-02-24 01:38:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:09,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:09,675 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:09,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 01:38:09,675 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash 385479740, now seen corresponding path program 64 times [2022-02-24 01:38:09,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:09,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311778024] [2022-02-24 01:38:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:09,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:09,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:09,678 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:09,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:09,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:09,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311778024] [2022-02-24 01:38:09,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1311778024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:09,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:09,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:09,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934443940] [2022-02-24 01:38:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:09,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:09,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:09,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:09,792 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:10,090 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-24 01:38:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:10,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:10,091 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:38:10,091 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:38:10,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:10,094 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:10,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:38:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 97. [2022-02-24 01:38:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-02-24 01:38:10,148 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 34 [2022-02-24 01:38:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:10,148 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-02-24 01:38:10,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-02-24 01:38:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:38:10,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:10,148 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:10,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 01:38:10,149 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:10,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2126808132, now seen corresponding path program 65 times [2022-02-24 01:38:10,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:10,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989574449] [2022-02-24 01:38:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:10,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:10,151 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:10,151 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:10,152 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:10,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:10,268 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:10,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989574449] [2022-02-24 01:38:10,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [989574449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:10,268 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:10,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:38:10,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719840761] [2022-02-24 01:38:10,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:10,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:38:10,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:38:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:38:10,269 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:10,566 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2022-02-24 01:38:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:38:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:38:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:10,567 INFO L225 Difference]: With dead ends: 124 [2022-02-24 01:38:10,567 INFO L226 Difference]: Without dead ends: 118 [2022-02-24 01:38:10,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:38:10,568 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:10,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-24 01:38:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2022-02-24 01:38:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-02-24 01:38:10,605 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 34 [2022-02-24 01:38:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:10,605 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-02-24 01:38:10,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-02-24 01:38:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:10,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:10,606 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:10,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 01:38:10,606 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1574474527, now seen corresponding path program 66 times [2022-02-24 01:38:10,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:10,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971673829] [2022-02-24 01:38:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:10,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:10,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:10,608 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:10,608 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:10,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:10,735 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:10,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971673829] [2022-02-24 01:38:10,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [971673829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:10,735 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:10,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:10,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142339808] [2022-02-24 01:38:10,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:10,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:10,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:10,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:10,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:10,736 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:11,037 INFO L93 Difference]: Finished difference Result 94 states and 132 transitions. [2022-02-24 01:38:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:11,038 INFO L225 Difference]: With dead ends: 94 [2022-02-24 01:38:11,038 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 01:38:11,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:11,038 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:11,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 21 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 01:38:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-02-24 01:38:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-02-24 01:38:11,082 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 36 [2022-02-24 01:38:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:11,082 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-02-24 01:38:11,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-02-24 01:38:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:11,082 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:11,082 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:11,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 01:38:11,083 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash 479525535, now seen corresponding path program 67 times [2022-02-24 01:38:11,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:11,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174840553] [2022-02-24 01:38:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:11,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:11,085 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:11,085 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:11,086 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:11,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:11,214 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:11,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174840553] [2022-02-24 01:38:11,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [174840553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:11,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:11,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:11,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482276227] [2022-02-24 01:38:11,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:11,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:11,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:11,214 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:11,480 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-24 01:38:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:11,481 INFO L225 Difference]: With dead ends: 98 [2022-02-24 01:38:11,481 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 01:38:11,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:11,482 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:11,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 01:38:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-02-24 01:38:11,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:11,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-02-24 01:38:11,529 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 36 [2022-02-24 01:38:11,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:11,529 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-02-24 01:38:11,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-02-24 01:38:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:11,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:11,530 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:11,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 01:38:11,530 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash 500531743, now seen corresponding path program 68 times [2022-02-24 01:38:11,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:11,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20675676] [2022-02-24 01:38:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:11,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:11,533 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:11,533 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:11,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:11,681 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:11,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20675676] [2022-02-24 01:38:11,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [20675676] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:11,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:11,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:11,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281055079] [2022-02-24 01:38:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:11,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:11,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:11,682 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:12,025 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-24 01:38:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:12,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:12,026 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:38:12,026 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 01:38:12,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:12,027 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:12,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 19 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 01:38:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-02-24 01:38:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-02-24 01:38:12,077 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 36 [2022-02-24 01:38:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:12,078 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-02-24 01:38:12,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-02-24 01:38:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:12,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:12,078 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:12,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 01:38:12,078 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash -787338849, now seen corresponding path program 69 times [2022-02-24 01:38:12,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:12,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406501508] [2022-02-24 01:38:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:12,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:12,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:12,081 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:12,081 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:12,212 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:12,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406501508] [2022-02-24 01:38:12,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406501508] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:12,212 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:12,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:12,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715133169] [2022-02-24 01:38:12,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:12,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:12,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:12,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:12,213 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:12,553 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-24 01:38:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:12,554 INFO L225 Difference]: With dead ends: 110 [2022-02-24 01:38:12,554 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 01:38:12,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:12,555 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:12,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 23 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:12,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 01:38:12,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2022-02-24 01:38:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-02-24 01:38:12,605 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 36 [2022-02-24 01:38:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:12,605 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-02-24 01:38:12,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-02-24 01:38:12,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:12,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:12,606 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:12,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 01:38:12,607 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1480396513, now seen corresponding path program 70 times [2022-02-24 01:38:12,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:12,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810932102] [2022-02-24 01:38:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:12,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:12,609 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:12,609 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:12,609 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:12,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:12,738 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:12,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810932102] [2022-02-24 01:38:12,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [810932102] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:12,738 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:12,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:12,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578814526] [2022-02-24 01:38:12,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:12,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:12,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:12,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:12,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:12,739 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:13,077 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-24 01:38:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:13,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:13,078 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:38:13,078 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 01:38:13,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:13,078 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:13,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 01:38:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-02-24 01:38:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-02-24 01:38:13,119 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 36 [2022-02-24 01:38:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:13,119 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-02-24 01:38:13,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-02-24 01:38:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:13,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:13,119 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:13,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 01:38:13,120 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1788880737, now seen corresponding path program 71 times [2022-02-24 01:38:13,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:13,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723102247] [2022-02-24 01:38:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:13,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:13,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:13,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:13,122 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:13,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:13,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:13,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723102247] [2022-02-24 01:38:13,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [723102247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:13,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:13,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:13,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160776153] [2022-02-24 01:38:13,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:13,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:13,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:13,243 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:13,519 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-24 01:38:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:13,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:13,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:13,520 INFO L225 Difference]: With dead ends: 122 [2022-02-24 01:38:13,520 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 01:38:13,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:13,520 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:13,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 01:38:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2022-02-24 01:38:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-02-24 01:38:13,574 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 36 [2022-02-24 01:38:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:13,574 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-02-24 01:38:13,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-02-24 01:38:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:13,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:13,575 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:13,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 01:38:13,575 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1889476577, now seen corresponding path program 72 times [2022-02-24 01:38:13,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:13,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830127787] [2022-02-24 01:38:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:13,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:13,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:13,578 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:13,578 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:13,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:13,719 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:13,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830127787] [2022-02-24 01:38:13,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830127787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:13,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:13,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:13,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310718024] [2022-02-24 01:38:13,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:13,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:13,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:13,720 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:14,023 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-24 01:38:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:14,023 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:14,024 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:38:14,024 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:38:14,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:14,024 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:14,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 23 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:38:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2022-02-24 01:38:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-02-24 01:38:14,082 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 36 [2022-02-24 01:38:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:14,082 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-02-24 01:38:14,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-02-24 01:38:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:14,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:14,083 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:14,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 01:38:14,083 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash 222168991, now seen corresponding path program 73 times [2022-02-24 01:38:14,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:14,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341016713] [2022-02-24 01:38:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:14,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:14,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:14,086 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:14,086 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:14,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:14,211 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:14,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341016713] [2022-02-24 01:38:14,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [341016713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:14,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:14,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:14,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314052101] [2022-02-24 01:38:14,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:14,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:14,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:14,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:14,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:14,212 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:14,533 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-24 01:38:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:14,533 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:14,534 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:38:14,534 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:38:14,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:14,534 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:14,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:38:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2022-02-24 01:38:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-02-24 01:38:14,591 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 36 [2022-02-24 01:38:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:14,591 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-02-24 01:38:14,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-02-24 01:38:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:14,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:14,592 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:14,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 01:38:14,592 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2005971169, now seen corresponding path program 74 times [2022-02-24 01:38:14,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:14,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818761450] [2022-02-24 01:38:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:14,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:14,594 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:14,594 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:14,594 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:14,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:14,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:14,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818761450] [2022-02-24 01:38:14,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1818761450] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:14,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:14,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:14,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688488482] [2022-02-24 01:38:14,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:14,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:14,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:14,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:14,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:14,712 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:14,992 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-24 01:38:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:14,993 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:38:14,993 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:38:14,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:14,994 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:14,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:38:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2022-02-24 01:38:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-02-24 01:38:15,058 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 36 [2022-02-24 01:38:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:15,058 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-02-24 01:38:15,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-02-24 01:38:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:15,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:15,059 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:15,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 01:38:15,059 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash -59984225, now seen corresponding path program 75 times [2022-02-24 01:38:15,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:15,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073241035] [2022-02-24 01:38:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:15,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:15,062 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:15,062 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:15,062 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:15,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:15,195 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:15,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073241035] [2022-02-24 01:38:15,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2073241035] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:15,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:15,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:15,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983338795] [2022-02-24 01:38:15,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:15,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:15,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:15,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:15,197 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:15,558 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-24 01:38:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:15,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:15,560 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:38:15,560 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:38:15,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:15,560 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:15,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 25 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:38:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2022-02-24 01:38:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-02-24 01:38:15,619 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 36 [2022-02-24 01:38:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:15,619 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-02-24 01:38:15,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-02-24 01:38:15,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:15,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:15,620 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:15,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 01:38:15,620 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1722695199, now seen corresponding path program 76 times [2022-02-24 01:38:15,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:15,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766146904] [2022-02-24 01:38:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:15,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:15,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:15,623 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:15,623 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:15,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:15,757 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:15,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766146904] [2022-02-24 01:38:15,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [766146904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:15,757 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:15,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:15,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900931252] [2022-02-24 01:38:15,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:15,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:15,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:15,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:15,758 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:16,083 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:38:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:16,083 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:16,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:16,086 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:38:16,086 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:38:16,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:16,086 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:16,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:38:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2022-02-24 01:38:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-02-24 01:38:16,146 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 36 [2022-02-24 01:38:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:16,146 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-02-24 01:38:16,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-02-24 01:38:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:38:16,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:16,147 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:16,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 01:38:16,147 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1185670559, now seen corresponding path program 77 times [2022-02-24 01:38:16,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:16,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012177966] [2022-02-24 01:38:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:16,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:16,150 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:16,150 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:16,150 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:16,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:16,277 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:16,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012177966] [2022-02-24 01:38:16,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1012177966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:16,277 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:16,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:38:16,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238660892] [2022-02-24 01:38:16,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:16,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:38:16,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:16,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:38:16,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:38:16,278 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:16,551 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-24 01:38:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:38:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:38:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:16,552 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:38:16,552 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:38:16,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:38:16,553 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:16,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 19 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:38:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2022-02-24 01:38:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-02-24 01:38:16,596 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 36 [2022-02-24 01:38:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:16,596 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-02-24 01:38:16,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-02-24 01:38:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:16,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:16,597 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:16,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 01:38:16,597 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1314633534, now seen corresponding path program 78 times [2022-02-24 01:38:16,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:16,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824735152] [2022-02-24 01:38:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:16,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:16,600 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:16,600 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:16,600 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:16,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:16,731 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:16,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824735152] [2022-02-24 01:38:16,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [824735152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:16,731 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:16,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:16,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228409077] [2022-02-24 01:38:16,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:16,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:16,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:16,732 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:17,036 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2022-02-24 01:38:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:17,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:17,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:17,037 INFO L225 Difference]: With dead ends: 100 [2022-02-24 01:38:17,037 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 01:38:17,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:17,039 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:17,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 23 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 01:38:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-02-24 01:38:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-02-24 01:38:17,079 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 38 [2022-02-24 01:38:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:17,079 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-02-24 01:38:17,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-02-24 01:38:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:17,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:17,079 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:17,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 01:38:17,080 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:17,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1885384770, now seen corresponding path program 79 times [2022-02-24 01:38:17,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:17,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465189282] [2022-02-24 01:38:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:17,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:17,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:17,082 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:17,082 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:17,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:17,228 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:17,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465189282] [2022-02-24 01:38:17,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465189282] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:17,228 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:17,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:17,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251396212] [2022-02-24 01:38:17,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:17,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:17,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:17,229 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:17,539 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-24 01:38:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:17,540 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:38:17,540 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 01:38:17,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:17,540 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:17,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 21 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 01:38:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-02-24 01:38:17,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-02-24 01:38:17,585 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 38 [2022-02-24 01:38:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:17,585 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-02-24 01:38:17,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-02-24 01:38:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:17,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:17,586 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:17,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 01:38:17,586 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1906390978, now seen corresponding path program 80 times [2022-02-24 01:38:17,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:17,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727169167] [2022-02-24 01:38:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:17,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:17,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:17,589 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:17,589 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:17,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:17,731 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:17,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727169167] [2022-02-24 01:38:17,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [727169167] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:17,731 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:17,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:17,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111676590] [2022-02-24 01:38:17,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:17,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:17,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:17,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:17,732 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:18,025 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-24 01:38:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:18,026 INFO L225 Difference]: With dead ends: 110 [2022-02-24 01:38:18,026 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 01:38:18,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:18,027 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:18,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 01:38:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2022-02-24 01:38:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-02-24 01:38:18,068 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 38 [2022-02-24 01:38:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:18,068 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-02-24 01:38:18,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-02-24 01:38:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:18,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:18,069 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:18,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 01:38:18,069 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:18,070 INFO L85 PathProgramCache]: Analyzing trace with hash 618520386, now seen corresponding path program 81 times [2022-02-24 01:38:18,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:18,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025681973] [2022-02-24 01:38:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:18,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:18,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:18,072 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:18,072 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:18,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:18,219 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:18,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025681973] [2022-02-24 01:38:18,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025681973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:18,220 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:18,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:18,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8490171] [2022-02-24 01:38:18,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:18,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:18,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:18,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:18,221 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:18,612 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-24 01:38:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:18,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:18,613 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:38:18,613 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 01:38:18,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:18,614 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:18,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 23 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 01:38:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2022-02-24 01:38:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-02-24 01:38:18,660 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 38 [2022-02-24 01:38:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:18,660 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-02-24 01:38:18,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-02-24 01:38:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:18,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:18,661 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:18,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 01:38:18,661 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash -74537278, now seen corresponding path program 82 times [2022-02-24 01:38:18,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:18,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909058899] [2022-02-24 01:38:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:18,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:18,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:18,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:18,664 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:18,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:18,813 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:18,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909058899] [2022-02-24 01:38:18,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [909058899] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:18,814 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:18,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:18,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194965208] [2022-02-24 01:38:18,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:18,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:18,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:18,814 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:19,133 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-24 01:38:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:19,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:19,134 INFO L225 Difference]: With dead ends: 122 [2022-02-24 01:38:19,134 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 01:38:19,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:19,134 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:19,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 19 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 01:38:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2022-02-24 01:38:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-02-24 01:38:19,183 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 38 [2022-02-24 01:38:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:19,183 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-02-24 01:38:19,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-02-24 01:38:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:19,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:19,184 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:19,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 01:38:19,184 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash -383021502, now seen corresponding path program 83 times [2022-02-24 01:38:19,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:19,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256021926] [2022-02-24 01:38:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:19,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:19,187 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:19,187 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:19,187 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:19,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:19,324 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:19,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256021926] [2022-02-24 01:38:19,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [256021926] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:19,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:19,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:19,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606968159] [2022-02-24 01:38:19,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:19,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:19,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:19,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:19,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:19,326 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:19,664 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-24 01:38:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:19,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:19,668 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:38:19,668 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:38:19,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:19,674 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:19,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 19 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:38:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2022-02-24 01:38:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-02-24 01:38:19,743 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 38 [2022-02-24 01:38:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:19,744 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-02-24 01:38:19,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-02-24 01:38:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:19,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:19,744 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:19,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 01:38:19,744 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash -483617342, now seen corresponding path program 84 times [2022-02-24 01:38:19,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:19,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128756936] [2022-02-24 01:38:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:19,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:19,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:19,747 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:19,747 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:19,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:19,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:19,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128756936] [2022-02-24 01:38:19,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128756936] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:19,892 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:19,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:19,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538613876] [2022-02-24 01:38:19,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:19,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:19,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:19,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:19,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:19,893 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:20,213 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-24 01:38:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:20,214 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:38:20,214 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:38:20,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:20,215 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:20,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:38:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2022-02-24 01:38:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-02-24 01:38:20,268 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 38 [2022-02-24 01:38:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:20,268 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-02-24 01:38:20,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-02-24 01:38:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:20,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:20,268 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:20,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 01:38:20,268 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:20,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1628028226, now seen corresponding path program 85 times [2022-02-24 01:38:20,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:20,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007898981] [2022-02-24 01:38:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:20,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:20,270 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:20,270 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:20,271 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:20,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:20,414 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:20,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007898981] [2022-02-24 01:38:20,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2007898981] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:20,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:20,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:20,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863282654] [2022-02-24 01:38:20,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:20,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:20,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:20,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:20,415 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:20,782 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-24 01:38:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:20,783 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:38:20,783 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:38:20,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:20,784 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:20,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:38:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 105. [2022-02-24 01:38:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-02-24 01:38:20,844 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 38 [2022-02-24 01:38:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:20,844 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-02-24 01:38:20,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-02-24 01:38:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:20,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:20,844 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:20,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 01:38:20,845 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:20,845 INFO L85 PathProgramCache]: Analyzing trace with hash -600111934, now seen corresponding path program 86 times [2022-02-24 01:38:20,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:20,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306847330] [2022-02-24 01:38:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:20,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:20,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:20,847 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:20,847 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:20,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:20,972 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:20,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306847330] [2022-02-24 01:38:20,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306847330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:20,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:20,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:20,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383598786] [2022-02-24 01:38:20,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:20,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:20,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:20,973 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:21,288 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-24 01:38:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:21,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:21,289 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:38:21,289 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:38:21,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:21,290 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:21,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:38:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2022-02-24 01:38:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-02-24 01:38:21,343 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 38 [2022-02-24 01:38:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:21,344 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-02-24 01:38:21,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-02-24 01:38:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:21,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:21,344 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:21,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 01:38:21,344 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:21,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1345875010, now seen corresponding path program 87 times [2022-02-24 01:38:21,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:21,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178312173] [2022-02-24 01:38:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:21,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:21,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:21,347 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:21,347 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:21,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:21,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:21,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178312173] [2022-02-24 01:38:21,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [178312173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:21,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:21,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:21,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623015202] [2022-02-24 01:38:21,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:21,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:21,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:21,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:21,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:21,493 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:21,822 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:38:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:21,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:21,823 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:38:21,823 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:38:21,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:21,823 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:21,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:38:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 109. [2022-02-24 01:38:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-02-24 01:38:21,881 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 38 [2022-02-24 01:38:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:21,881 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-02-24 01:38:21,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-02-24 01:38:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:21,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:21,881 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:21,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 01:38:21,882 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:21,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1166412862, now seen corresponding path program 88 times [2022-02-24 01:38:21,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:21,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397411364] [2022-02-24 01:38:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:21,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:21,884 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:21,884 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:21,884 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:22,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:22,018 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:22,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397411364] [2022-02-24 01:38:22,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397411364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:22,018 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:22,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:22,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534143357] [2022-02-24 01:38:22,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:22,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:22,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:22,018 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:22,351 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:38:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:22,352 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:38:22,352 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:38:22,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:22,352 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:22,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 27 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:38:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2022-02-24 01:38:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-02-24 01:38:22,409 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 38 [2022-02-24 01:38:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:22,409 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-02-24 01:38:22,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-02-24 01:38:22,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:22,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:22,409 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:22,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 01:38:22,410 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1703437502, now seen corresponding path program 89 times [2022-02-24 01:38:22,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:22,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750236100] [2022-02-24 01:38:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:22,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:22,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:22,412 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:22,412 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:22,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:22,571 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:22,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750236100] [2022-02-24 01:38:22,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1750236100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:22,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:22,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:22,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553817634] [2022-02-24 01:38:22,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:22,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:22,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:22,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:22,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:22,572 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:22,900 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:38:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:22,901 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:38:22,901 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:38:22,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:22,901 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:22,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:38:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2022-02-24 01:38:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-24 01:38:22,984 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 38 [2022-02-24 01:38:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:22,984 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-24 01:38:22,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-24 01:38:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:38:22,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:22,985 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:22,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-24 01:38:22,985 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:22,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1906926274, now seen corresponding path program 90 times [2022-02-24 01:38:22,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:22,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543833630] [2022-02-24 01:38:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:22,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:22,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:22,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:22,990 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:23,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:23,135 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:23,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543833630] [2022-02-24 01:38:23,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543833630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:23,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:23,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:38:23,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664972959] [2022-02-24 01:38:23,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:23,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:38:23,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:38:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:38:23,136 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:23,442 INFO L93 Difference]: Finished difference Result 144 states and 206 transitions. [2022-02-24 01:38:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:38:23,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:38:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:23,443 INFO L225 Difference]: With dead ends: 144 [2022-02-24 01:38:23,443 INFO L226 Difference]: Without dead ends: 138 [2022-02-24 01:38:23,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:38:23,443 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:23,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-24 01:38:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2022-02-24 01:38:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-02-24 01:38:23,489 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 38 [2022-02-24 01:38:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:23,489 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-02-24 01:38:23,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-02-24 01:38:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:23,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:23,490 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:23,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-24 01:38:23,490 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1096360357, now seen corresponding path program 91 times [2022-02-24 01:38:23,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:23,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76755062] [2022-02-24 01:38:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:23,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:23,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:23,492 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:23,492 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:23,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:23,642 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:23,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76755062] [2022-02-24 01:38:23,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [76755062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:23,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:23,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:23,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725964888] [2022-02-24 01:38:23,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:23,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:23,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:23,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:23,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:23,643 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:23,961 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2022-02-24 01:38:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:23,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:23,962 INFO L225 Difference]: With dead ends: 106 [2022-02-24 01:38:23,962 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 01:38:23,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:23,962 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:23,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 21 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 01:38:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-02-24 01:38:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-02-24 01:38:24,005 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 40 [2022-02-24 01:38:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:24,005 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-02-24 01:38:24,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-02-24 01:38:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:24,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:24,005 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:24,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-24 01:38:24,006 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:24,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:24,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1411365, now seen corresponding path program 92 times [2022-02-24 01:38:24,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:24,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873572594] [2022-02-24 01:38:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:24,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:24,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:24,008 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:24,008 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:24,170 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:24,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873572594] [2022-02-24 01:38:24,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1873572594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:24,171 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:24,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:24,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929988892] [2022-02-24 01:38:24,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:24,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:24,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:24,172 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:24,485 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-24 01:38:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:24,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:24,486 INFO L225 Difference]: With dead ends: 110 [2022-02-24 01:38:24,486 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 01:38:24,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:24,486 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:24,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 01:38:24,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-02-24 01:38:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-02-24 01:38:24,532 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 40 [2022-02-24 01:38:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:24,532 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-02-24 01:38:24,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:24,532 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-02-24 01:38:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:24,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:24,533 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:24,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-24 01:38:24,533 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:24,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:24,533 INFO L85 PathProgramCache]: Analyzing trace with hash 22417573, now seen corresponding path program 93 times [2022-02-24 01:38:24,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:24,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739548827] [2022-02-24 01:38:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:24,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:24,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:24,535 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:24,535 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:24,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:24,672 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:24,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739548827] [2022-02-24 01:38:24,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739548827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:24,673 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:24,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:24,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736958146] [2022-02-24 01:38:24,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:24,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:24,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:24,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:24,674 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:24,992 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-24 01:38:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:24,993 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:38:24,993 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 01:38:24,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:24,993 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:24,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 01:38:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2022-02-24 01:38:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-02-24 01:38:25,041 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 40 [2022-02-24 01:38:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:25,041 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-02-24 01:38:25,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-02-24 01:38:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:25,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:25,041 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-24 01:38:25,042 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1265453019, now seen corresponding path program 94 times [2022-02-24 01:38:25,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:25,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475390729] [2022-02-24 01:38:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:25,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:25,044 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:25,044 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:25,044 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:25,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:25,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:25,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475390729] [2022-02-24 01:38:25,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1475390729] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:25,192 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:25,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:25,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112322801] [2022-02-24 01:38:25,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:25,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:25,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:25,193 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:25,515 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-24 01:38:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:25,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:25,516 INFO L225 Difference]: With dead ends: 122 [2022-02-24 01:38:25,516 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 01:38:25,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:25,517 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:25,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 01:38:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2022-02-24 01:38:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-02-24 01:38:25,565 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 40 [2022-02-24 01:38:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:25,565 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-02-24 01:38:25,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-02-24 01:38:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:25,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:25,566 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:25,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-24 01:38:25,566 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1958510683, now seen corresponding path program 95 times [2022-02-24 01:38:25,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:25,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019714241] [2022-02-24 01:38:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:25,568 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:25,568 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:25,568 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:25,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:25,708 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:25,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019714241] [2022-02-24 01:38:25,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019714241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:25,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:25,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:25,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203276608] [2022-02-24 01:38:25,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:25,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:25,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:25,709 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:26,037 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-24 01:38:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:26,038 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:38:26,038 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:38:26,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:26,039 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:26,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:38:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2022-02-24 01:38:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-02-24 01:38:26,102 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 40 [2022-02-24 01:38:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:26,102 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-02-24 01:38:26,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-02-24 01:38:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:26,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:26,102 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:26,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-24 01:38:26,103 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:26,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2027972389, now seen corresponding path program 96 times [2022-02-24 01:38:26,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:26,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320095316] [2022-02-24 01:38:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:26,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:26,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:26,105 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:26,105 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:26,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:26,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:26,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320095316] [2022-02-24 01:38:26,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320095316] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:26,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:26,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:26,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560935400] [2022-02-24 01:38:26,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:26,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:26,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:26,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:26,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:26,260 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:26,590 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-24 01:38:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:26,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:26,591 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:38:26,591 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:38:26,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:26,591 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:26,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:26,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:38:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 107. [2022-02-24 01:38:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-02-24 01:38:26,653 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 40 [2022-02-24 01:38:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:26,653 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-02-24 01:38:26,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-02-24 01:38:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:26,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:26,653 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:26,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-24 01:38:26,654 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1927376549, now seen corresponding path program 97 times [2022-02-24 01:38:26,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:26,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055086512] [2022-02-24 01:38:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:26,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:26,656 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:26,656 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:26,656 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:26,816 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:26,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055086512] [2022-02-24 01:38:26,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2055086512] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:26,816 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:26,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:26,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993747096] [2022-02-24 01:38:26,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:26,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:26,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:26,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:26,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:26,817 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:27,242 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-24 01:38:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:27,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:27,243 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:38:27,243 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:38:27,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:27,244 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:27,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:38:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2022-02-24 01:38:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-02-24 01:38:27,302 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 40 [2022-02-24 01:38:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:27,302 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-02-24 01:38:27,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-02-24 01:38:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:27,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:27,303 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:27,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-24 01:38:27,303 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:27,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:27,303 INFO L85 PathProgramCache]: Analyzing trace with hash -255945179, now seen corresponding path program 98 times [2022-02-24 01:38:27,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:27,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191196838] [2022-02-24 01:38:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:27,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:27,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:27,306 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:27,306 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:27,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:27,470 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:27,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191196838] [2022-02-24 01:38:27,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191196838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:27,470 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:27,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:27,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270389378] [2022-02-24 01:38:27,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:27,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:27,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:27,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:27,471 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:27,820 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-24 01:38:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:27,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:27,821 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:38:27,821 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:38:27,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:27,821 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:27,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:38:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 111. [2022-02-24 01:38:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-02-24 01:38:27,882 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 40 [2022-02-24 01:38:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:27,882 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-02-24 01:38:27,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-02-24 01:38:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:27,883 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:27,883 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:27,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-24 01:38:27,883 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:27,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1810881957, now seen corresponding path program 99 times [2022-02-24 01:38:27,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:27,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039977335] [2022-02-24 01:38:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:27,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:27,886 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:27,886 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:27,886 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:28,041 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:28,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039977335] [2022-02-24 01:38:28,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2039977335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:28,041 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:28,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:28,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10603864] [2022-02-24 01:38:28,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:28,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:28,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:28,042 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:28,386 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:38:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:28,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:28,388 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:38:28,388 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:38:28,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:28,388 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:28,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:38:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2022-02-24 01:38:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-24 01:38:28,448 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 40 [2022-02-24 01:38:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:28,448 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-24 01:38:28,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-24 01:38:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:28,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:28,449 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:28,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-24 01:38:28,449 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash -538098395, now seen corresponding path program 100 times [2022-02-24 01:38:28,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:28,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033108743] [2022-02-24 01:38:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:28,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:28,451 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:28,451 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:28,451 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:28,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:28,609 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:28,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033108743] [2022-02-24 01:38:28,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2033108743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:28,609 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:28,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:28,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76435568] [2022-02-24 01:38:28,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:28,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:28,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:28,610 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:28,980 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:38:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:28,981 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:38:28,981 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:38:28,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:28,982 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:28,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:38:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2022-02-24 01:38:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-02-24 01:38:29,065 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 40 [2022-02-24 01:38:29,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:29,065 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-02-24 01:38:29,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-02-24 01:38:29,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:29,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:29,065 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:29,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-24 01:38:29,066 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1244581029, now seen corresponding path program 101 times [2022-02-24 01:38:29,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:29,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564660108] [2022-02-24 01:38:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:29,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:29,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:29,068 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:29,068 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:29,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:29,203 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:29,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564660108] [2022-02-24 01:38:29,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1564660108] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:29,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:29,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:29,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751472945] [2022-02-24 01:38:29,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:29,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:29,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:29,204 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:29,550 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:38:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:29,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:29,551 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:38:29,551 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:38:29,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:29,551 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:29,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:38:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2022-02-24 01:38:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-02-24 01:38:29,644 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 40 [2022-02-24 01:38:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:29,644 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-02-24 01:38:29,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-02-24 01:38:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:29,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:29,645 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:29,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-24 01:38:29,645 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash 707556389, now seen corresponding path program 102 times [2022-02-24 01:38:29,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:29,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790079319] [2022-02-24 01:38:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:29,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:29,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:29,647 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:29,647 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:29,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:29,788 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:29,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790079319] [2022-02-24 01:38:29,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [790079319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:29,788 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:29,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:29,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612663668] [2022-02-24 01:38:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:29,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:29,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:29,788 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:30,133 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:38:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:30,134 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:38:30,134 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:38:30,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:30,135 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:30,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 15 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:38:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 119. [2022-02-24 01:38:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-24 01:38:30,200 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 40 [2022-02-24 01:38:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:30,200 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-24 01:38:30,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-24 01:38:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:30,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:30,201 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:30,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-24 01:38:30,201 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:30,201 INFO L85 PathProgramCache]: Analyzing trace with hash 22952869, now seen corresponding path program 103 times [2022-02-24 01:38:30,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:30,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122353595] [2022-02-24 01:38:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:30,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:30,203 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:30,203 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:30,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:30,341 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:30,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122353595] [2022-02-24 01:38:30,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [122353595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:30,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:30,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:30,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162794923] [2022-02-24 01:38:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:30,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:30,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:30,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:30,342 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:30,703 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:38:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:30,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:30,704 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:38:30,704 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:38:30,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:30,705 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:30,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 25 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:38:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2022-02-24 01:38:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-24 01:38:30,765 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 40 [2022-02-24 01:38:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:30,765 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-24 01:38:30,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:30,765 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-24 01:38:30,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:38:30,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:30,766 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:30,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-24 01:38:30,766 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash -751033563, now seen corresponding path program 104 times [2022-02-24 01:38:30,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:30,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637062300] [2022-02-24 01:38:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:30,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:30,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:30,770 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:30,771 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:30,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:30,908 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:30,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637062300] [2022-02-24 01:38:30,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1637062300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:30,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:30,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:38:30,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277004607] [2022-02-24 01:38:30,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:30,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:38:30,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:38:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:38:30,909 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:31,247 INFO L93 Difference]: Finished difference Result 154 states and 221 transitions. [2022-02-24 01:38:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:38:31,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:38:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:31,248 INFO L225 Difference]: With dead ends: 154 [2022-02-24 01:38:31,248 INFO L226 Difference]: Without dead ends: 148 [2022-02-24 01:38:31,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:38:31,248 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:31,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-24 01:38:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2022-02-24 01:38:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-02-24 01:38:31,301 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 40 [2022-02-24 01:38:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:31,301 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-02-24 01:38:31,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-02-24 01:38:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:31,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:31,302 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:31,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-24 01:38:31,302 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:31,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:31,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1220850232, now seen corresponding path program 105 times [2022-02-24 01:38:31,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:31,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638110994] [2022-02-24 01:38:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:31,304 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:31,304 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:31,304 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:31,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:31,465 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:31,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638110994] [2022-02-24 01:38:31,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [638110994] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:31,465 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:31,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:31,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088519866] [2022-02-24 01:38:31,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:31,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:31,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:31,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:31,466 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:31,815 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2022-02-24 01:38:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:31,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:31,816 INFO L225 Difference]: With dead ends: 112 [2022-02-24 01:38:31,816 INFO L226 Difference]: Without dead ends: 106 [2022-02-24 01:38:31,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:31,816 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:31,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-24 01:38:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-02-24 01:38:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-02-24 01:38:31,865 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 42 [2022-02-24 01:38:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:31,866 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-02-24 01:38:31,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-02-24 01:38:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:31,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:31,866 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:31,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-24 01:38:31,866 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:31,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1979168072, now seen corresponding path program 106 times [2022-02-24 01:38:31,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:31,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288793092] [2022-02-24 01:38:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:31,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:31,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:31,871 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:31,871 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:32,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:32,027 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:32,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288793092] [2022-02-24 01:38:32,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [288793092] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:32,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:32,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:32,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616469247] [2022-02-24 01:38:32,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:32,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:32,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:32,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:32,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:32,028 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:32,375 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-24 01:38:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:32,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:32,376 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:38:32,376 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 01:38:32,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:32,376 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:32,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 17 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 01:38:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2022-02-24 01:38:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-02-24 01:38:32,429 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 42 [2022-02-24 01:38:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:32,429 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-02-24 01:38:32,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-02-24 01:38:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:32,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:32,429 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:32,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-24 01:38:32,429 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:32,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2000174280, now seen corresponding path program 107 times [2022-02-24 01:38:32,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:32,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200367406] [2022-02-24 01:38:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:32,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:32,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:32,433 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:32,433 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:32,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:32,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:32,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200367406] [2022-02-24 01:38:32,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200367406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:32,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:32,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:32,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617579900] [2022-02-24 01:38:32,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:32,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:32,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:32,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:32,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:32,587 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:32,933 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-24 01:38:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:32,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:32,933 INFO L225 Difference]: With dead ends: 122 [2022-02-24 01:38:32,934 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 01:38:32,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:32,934 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:32,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 01:38:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2022-02-24 01:38:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-02-24 01:38:32,988 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 42 [2022-02-24 01:38:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:32,988 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-02-24 01:38:32,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-02-24 01:38:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:32,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:32,989 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:32,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-24 01:38:32,989 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash 712303688, now seen corresponding path program 108 times [2022-02-24 01:38:32,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:32,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448231771] [2022-02-24 01:38:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:32,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:32,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:32,992 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:33,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:33,168 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:33,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448231771] [2022-02-24 01:38:33,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [448231771] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:33,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:33,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:33,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024636738] [2022-02-24 01:38:33,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:33,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:33,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:33,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:33,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:33,169 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:33,574 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-24 01:38:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:33,574 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:33,575 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:38:33,575 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:38:33,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:33,575 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:33,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:38:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2022-02-24 01:38:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-02-24 01:38:33,632 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 42 [2022-02-24 01:38:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:33,632 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-02-24 01:38:33,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-02-24 01:38:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:33,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:33,632 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:33,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-24 01:38:33,632 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash 19246024, now seen corresponding path program 109 times [2022-02-24 01:38:33,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:33,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000905150] [2022-02-24 01:38:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:33,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:33,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:33,634 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:33,634 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:33,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:33,789 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:33,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000905150] [2022-02-24 01:38:33,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000905150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:33,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:33,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:33,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234078749] [2022-02-24 01:38:33,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:33,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:33,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:33,790 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:34,153 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-24 01:38:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:34,153 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:38:34,154 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:38:34,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:34,154 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:34,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:38:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2022-02-24 01:38:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-02-24 01:38:34,229 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 42 [2022-02-24 01:38:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:34,229 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-02-24 01:38:34,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-02-24 01:38:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:34,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:34,229 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:34,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-24 01:38:34,230 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash -289238200, now seen corresponding path program 110 times [2022-02-24 01:38:34,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:34,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788893175] [2022-02-24 01:38:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:34,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:34,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:34,232 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:34,232 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:34,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:34,382 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:34,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788893175] [2022-02-24 01:38:34,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [788893175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:34,383 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:34,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:34,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137388253] [2022-02-24 01:38:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:34,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:34,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:34,383 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:34,751 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-24 01:38:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:34,751 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:34,752 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:38:34,752 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:38:34,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:34,753 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:34,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:38:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 113. [2022-02-24 01:38:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-24 01:38:34,825 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 42 [2022-02-24 01:38:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:34,825 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-24 01:38:34,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-24 01:38:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:34,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:34,825 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:34,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-24 01:38:34,825 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:34,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:34,826 INFO L85 PathProgramCache]: Analyzing trace with hash -389834040, now seen corresponding path program 111 times [2022-02-24 01:38:34,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:34,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358573926] [2022-02-24 01:38:34,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:34,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:34,828 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:34,828 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:34,828 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:34,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:34,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:34,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358573926] [2022-02-24 01:38:34,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358573926] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:34,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:34,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:34,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550521218] [2022-02-24 01:38:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:34,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:34,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:34,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:34,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:34,980 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:35,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:35,356 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-24 01:38:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:35,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:35,357 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:38:35,357 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:38:35,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:35,357 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:35,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 27 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:38:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 115. [2022-02-24 01:38:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-02-24 01:38:35,420 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 42 [2022-02-24 01:38:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:35,420 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-02-24 01:38:35,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-02-24 01:38:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:35,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:35,421 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:35,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-24 01:38:35,421 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:35,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1721811528, now seen corresponding path program 112 times [2022-02-24 01:38:35,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:35,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970150708] [2022-02-24 01:38:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:35,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:35,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:35,425 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:35,425 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:35,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:35,573 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:35,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970150708] [2022-02-24 01:38:35,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [970150708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:35,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:35,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:35,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753994922] [2022-02-24 01:38:35,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:35,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:35,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:35,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:35,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:35,574 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:35,978 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:38:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:35,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:35,979 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:38:35,979 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:38:35,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:35,979 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:35,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:38:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 117. [2022-02-24 01:38:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-02-24 01:38:36,047 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 42 [2022-02-24 01:38:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:36,047 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-02-24 01:38:36,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-02-24 01:38:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:36,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:36,047 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:36,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-24 01:38:36,047 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:36,047 INFO L85 PathProgramCache]: Analyzing trace with hash -506328632, now seen corresponding path program 113 times [2022-02-24 01:38:36,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:36,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757642721] [2022-02-24 01:38:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:36,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:36,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:36,049 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:36,049 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:36,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:36,202 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:36,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757642721] [2022-02-24 01:38:36,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [757642721] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:36,202 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:36,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:36,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076690625] [2022-02-24 01:38:36,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:36,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:36,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:36,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:36,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:36,203 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:36,587 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:38:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:36,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:36,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:36,588 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:38:36,588 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:38:36,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:36,588 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:36,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:38:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2022-02-24 01:38:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-24 01:38:36,667 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 42 [2022-02-24 01:38:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:36,667 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-24 01:38:36,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-24 01:38:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:36,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:36,667 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:36,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-24 01:38:36,667 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1439658312, now seen corresponding path program 114 times [2022-02-24 01:38:36,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:36,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700431182] [2022-02-24 01:38:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:36,670 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:36,670 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:36,670 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:36,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:36,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:36,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700431182] [2022-02-24 01:38:36,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [700431182] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:36,818 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:36,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:36,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522828521] [2022-02-24 01:38:36,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:36,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:36,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:36,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:36,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:36,818 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:37,203 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:38:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:37,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:37,203 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:38:37,203 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:38:37,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:37,204 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:37,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:38:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 121. [2022-02-24 01:38:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-24 01:38:37,274 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 42 [2022-02-24 01:38:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:37,274 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-24 01:38:37,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-24 01:38:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:37,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:37,275 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:37,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-24 01:38:37,275 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:37,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1072629560, now seen corresponding path program 115 times [2022-02-24 01:38:37,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:37,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902107775] [2022-02-24 01:38:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:37,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:37,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:37,277 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:37,277 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:37,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:37,424 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:37,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902107775] [2022-02-24 01:38:37,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [902107775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:37,424 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:37,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:37,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677097767] [2022-02-24 01:38:37,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:37,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:37,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:37,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:37,425 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:37,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:37,810 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:38:37,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:37,810 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:37,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:37,811 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:38:37,811 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:38:37,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:37,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:37,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 17 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:37,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:38:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2022-02-24 01:38:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-02-24 01:38:37,885 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 42 [2022-02-24 01:38:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:37,886 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-02-24 01:38:37,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-02-24 01:38:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:37,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:37,886 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:37,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-24 01:38:37,886 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:37,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1609654200, now seen corresponding path program 116 times [2022-02-24 01:38:37,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:37,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671841508] [2022-02-24 01:38:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:37,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:37,888 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:37,888 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:37,888 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:38,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:38,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:38,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671841508] [2022-02-24 01:38:38,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671841508] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:38,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:38,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:38,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111979994] [2022-02-24 01:38:38,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:38,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:38,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:38,069 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:38,464 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:38:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:38,464 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:38:38,464 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:38:38,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:38,465 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:38,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:38:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 125. [2022-02-24 01:38:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-24 01:38:38,538 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 42 [2022-02-24 01:38:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:38,538 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-24 01:38:38,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-24 01:38:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:38,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:38,539 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:38,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-24 01:38:38,539 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2000709576, now seen corresponding path program 117 times [2022-02-24 01:38:38,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:38,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556593853] [2022-02-24 01:38:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:38,541 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:38,541 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:38,541 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:38,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:38,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:38,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556593853] [2022-02-24 01:38:38,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [556593853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:38,699 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:38,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:38,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476346606] [2022-02-24 01:38:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:38,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:38,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:38,700 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:39,095 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:38:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:39,095 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:39,096 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:38:39,096 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:38:39,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:39,096 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:39,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:38:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2022-02-24 01:38:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-24 01:38:39,174 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 42 [2022-02-24 01:38:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:39,175 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-24 01:38:39,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-24 01:38:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:39,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:39,175 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:39,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-24 01:38:39,175 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1226723144, now seen corresponding path program 118 times [2022-02-24 01:38:39,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:39,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258251987] [2022-02-24 01:38:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:39,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:39,178 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:39,178 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:39,178 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:39,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:39,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:39,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258251987] [2022-02-24 01:38:39,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258251987] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:39,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:39,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:39,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609789094] [2022-02-24 01:38:39,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:39,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:39,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:39,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:39,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:39,331 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:39,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:39,728 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:38:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:39,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:39,729 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:38:39,729 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:38:39,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:39,729 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:39,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:38:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 129. [2022-02-24 01:38:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-24 01:38:39,803 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 42 [2022-02-24 01:38:39,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:39,804 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-24 01:38:39,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-24 01:38:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:38:39,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:39,804 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:39,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-24 01:38:39,804 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash 455104200, now seen corresponding path program 119 times [2022-02-24 01:38:39,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:39,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491192100] [2022-02-24 01:38:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:39,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:39,807 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:39,807 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:39,807 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:39,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:39,965 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:39,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491192100] [2022-02-24 01:38:39,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [491192100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:39,965 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:39,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:38:39,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894845398] [2022-02-24 01:38:39,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:39,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:38:39,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:38:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:38:39,966 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:40,369 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:38:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:38:40,369 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:38:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:40,370 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:38:40,370 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:38:40,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:38:40,370 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:40,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:38:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 103. [2022-02-24 01:38:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-02-24 01:38:40,441 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 42 [2022-02-24 01:38:40,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:40,441 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-02-24 01:38:40,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-02-24 01:38:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:40,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:40,442 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:40,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-24 01:38:40,442 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1027800363, now seen corresponding path program 120 times [2022-02-24 01:38:40,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:40,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605984340] [2022-02-24 01:38:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:40,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:40,444 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:40,444 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:40,444 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:40,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:40,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:40,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605984340] [2022-02-24 01:38:40,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1605984340] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:40,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:40,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:40,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089366204] [2022-02-24 01:38:40,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:40,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:40,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:40,601 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:40,975 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2022-02-24 01:38:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:40,975 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:40,976 INFO L225 Difference]: With dead ends: 118 [2022-02-24 01:38:40,976 INFO L226 Difference]: Without dead ends: 112 [2022-02-24 01:38:40,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:40,976 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:40,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-24 01:38:41,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-02-24 01:38:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-02-24 01:38:41,034 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 44 [2022-02-24 01:38:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:41,034 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-02-24 01:38:41,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-02-24 01:38:41,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:41,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:41,034 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:41,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-24 01:38:41,034 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:41,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:41,034 INFO L85 PathProgramCache]: Analyzing trace with hash -67148629, now seen corresponding path program 121 times [2022-02-24 01:38:41,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:41,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769221200] [2022-02-24 01:38:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:41,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:41,036 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:41,036 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:41,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:41,224 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:41,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769221200] [2022-02-24 01:38:41,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [769221200] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:41,224 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:41,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:41,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104430757] [2022-02-24 01:38:41,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:41,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:41,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:41,225 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:41,611 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-24 01:38:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:41,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:41,611 INFO L225 Difference]: With dead ends: 122 [2022-02-24 01:38:41,611 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 01:38:41,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:41,612 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:41,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 01:38:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2022-02-24 01:38:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-02-24 01:38:41,675 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 44 [2022-02-24 01:38:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:41,675 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-02-24 01:38:41,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-02-24 01:38:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:41,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:41,675 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:41,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-24 01:38:41,675 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:41,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:41,676 INFO L85 PathProgramCache]: Analyzing trace with hash -46142421, now seen corresponding path program 122 times [2022-02-24 01:38:41,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:41,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988260133] [2022-02-24 01:38:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:41,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:41,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:41,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:41,678 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:41,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:41,869 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:41,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988260133] [2022-02-24 01:38:41,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [988260133] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:41,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:41,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:41,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997052211] [2022-02-24 01:38:41,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:41,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:41,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:41,873 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:42,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:42,260 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-24 01:38:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:42,261 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:42,261 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:38:42,261 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:38:42,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:42,261 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:42,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:38:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-02-24 01:38:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-24 01:38:42,329 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 44 [2022-02-24 01:38:42,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:42,330 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-24 01:38:42,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:42,330 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-24 01:38:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:42,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:42,330 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:42,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-24 01:38:42,330 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1334013013, now seen corresponding path program 123 times [2022-02-24 01:38:42,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:42,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146516323] [2022-02-24 01:38:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:42,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:42,333 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:42,333 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:42,333 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:42,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:42,503 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:42,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146516323] [2022-02-24 01:38:42,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [146516323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:42,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:42,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:42,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749484038] [2022-02-24 01:38:42,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:42,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:42,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:42,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:42,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:42,504 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:42,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:42,896 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-24 01:38:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:42,897 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:38:42,897 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:38:42,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:42,898 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:42,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:38:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2022-02-24 01:38:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-02-24 01:38:42,969 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 44 [2022-02-24 01:38:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:42,969 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-02-24 01:38:42,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-02-24 01:38:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:42,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:42,969 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:42,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-24 01:38:42,970 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2027070677, now seen corresponding path program 124 times [2022-02-24 01:38:42,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:42,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052852983] [2022-02-24 01:38:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:42,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:42,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:42,972 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:42,972 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:43,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:43,164 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:43,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052852983] [2022-02-24 01:38:43,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052852983] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:43,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:43,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:43,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924888526] [2022-02-24 01:38:43,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:43,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:43,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:43,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:43,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:43,165 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:43,564 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-24 01:38:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:43,565 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:38:43,565 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:38:43,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:43,565 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:43,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:38:43,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2022-02-24 01:38:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-02-24 01:38:43,635 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 44 [2022-02-24 01:38:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:43,635 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-02-24 01:38:43,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-02-24 01:38:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:43,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:43,636 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:43,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-24 01:38:43,636 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1959412395, now seen corresponding path program 125 times [2022-02-24 01:38:43,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:43,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909827837] [2022-02-24 01:38:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:43,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:43,639 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:43,639 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:43,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:43,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:43,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909827837] [2022-02-24 01:38:43,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [909827837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:43,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:43,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:43,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741712991] [2022-02-24 01:38:43,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:43,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:43,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:43,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:43,812 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:44,214 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-24 01:38:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:44,216 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:38:44,216 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:38:44,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:44,216 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:44,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 15 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:38:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 119. [2022-02-24 01:38:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-24 01:38:44,291 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 44 [2022-02-24 01:38:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:44,292 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-24 01:38:44,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-24 01:38:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:44,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:44,292 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:44,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-24 01:38:44,292 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:44,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1858816555, now seen corresponding path program 126 times [2022-02-24 01:38:44,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:44,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722444772] [2022-02-24 01:38:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:44,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:44,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:44,295 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:44,295 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:44,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:44,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:44,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722444772] [2022-02-24 01:38:44,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [722444772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:44,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:44,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:44,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842000698] [2022-02-24 01:38:44,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:44,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:44,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:44,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:44,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:44,493 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:44,901 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:38:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:44,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:44,902 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:38:44,902 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:38:44,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:44,902 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:44,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 19 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:38:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2022-02-24 01:38:44,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-24 01:38:44,979 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 44 [2022-02-24 01:38:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:44,979 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-24 01:38:44,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-24 01:38:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:44,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:44,979 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:44,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-24 01:38:44,980 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash -324505173, now seen corresponding path program 127 times [2022-02-24 01:38:44,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:44,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510188049] [2022-02-24 01:38:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:44,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:44,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:44,982 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:44,982 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:45,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:45,141 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:45,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510188049] [2022-02-24 01:38:45,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [510188049] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:45,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:45,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:45,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425931162] [2022-02-24 01:38:45,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:45,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:45,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:45,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:45,142 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:45,560 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:38:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:45,560 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:38:45,560 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:38:45,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:45,561 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:45,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:38:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 123. [2022-02-24 01:38:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-02-24 01:38:45,637 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 44 [2022-02-24 01:38:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:45,638 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-02-24 01:38:45,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-02-24 01:38:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:45,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:45,638 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:45,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-24 01:38:45,639 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:45,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:45,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1742321963, now seen corresponding path program 128 times [2022-02-24 01:38:45,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:45,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080593126] [2022-02-24 01:38:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:45,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:45,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:45,641 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:45,641 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:45,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:45,804 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:45,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080593126] [2022-02-24 01:38:45,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1080593126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:45,804 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:45,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:45,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470640505] [2022-02-24 01:38:45,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:45,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:45,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:45,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:45,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:45,805 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:46,233 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:38:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:46,234 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:38:46,234 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:38:46,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:46,234 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:46,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 25 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:38:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 125. [2022-02-24 01:38:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-24 01:38:46,314 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 44 [2022-02-24 01:38:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:46,314 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-24 01:38:46,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-24 01:38:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:46,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:46,315 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:46,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-24 01:38:46,315 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:46,315 INFO L85 PathProgramCache]: Analyzing trace with hash -606658389, now seen corresponding path program 129 times [2022-02-24 01:38:46,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:46,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516278087] [2022-02-24 01:38:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:46,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:46,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:46,316 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:46,316 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:46,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:46,479 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:46,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516278087] [2022-02-24 01:38:46,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516278087] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:46,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:46,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:46,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864533806] [2022-02-24 01:38:46,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:46,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:46,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:46,480 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:46,910 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:38:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:46,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:46,911 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:38:46,911 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:38:46,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:46,911 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:46,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:38:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 127. [2022-02-24 01:38:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-24 01:38:46,992 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 44 [2022-02-24 01:38:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:46,993 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-24 01:38:46,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-24 01:38:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:46,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:46,993 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:46,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-24 01:38:46,993 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:46,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1176021035, now seen corresponding path program 130 times [2022-02-24 01:38:46,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:46,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462249548] [2022-02-24 01:38:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:46,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:46,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:46,995 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:46,995 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:47,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:47,156 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:47,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462249548] [2022-02-24 01:38:47,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462249548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:47,157 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:47,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:47,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673285813] [2022-02-24 01:38:47,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:47,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:47,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:47,158 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:47,585 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:38:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:47,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:47,586 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:38:47,586 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:38:47,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:47,586 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:47,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:38:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 129. [2022-02-24 01:38:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-24 01:38:47,670 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 44 [2022-02-24 01:38:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:47,670 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-24 01:38:47,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-24 01:38:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:47,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:47,670 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:47,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-24 01:38:47,670 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:47,671 INFO L85 PathProgramCache]: Analyzing trace with hash 638996395, now seen corresponding path program 131 times [2022-02-24 01:38:47,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:47,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30607599] [2022-02-24 01:38:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:47,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:47,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:47,672 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:47,672 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:47,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:47,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:47,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30607599] [2022-02-24 01:38:47,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [30607599] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:47,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:47,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:47,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804844079] [2022-02-24 01:38:47,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:47,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:47,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:47,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:47,830 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:48,368 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:38:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:48,368 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:48,369 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:38:48,369 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:38:48,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:48,369 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:48,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:38:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2022-02-24 01:38:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-24 01:38:48,483 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 44 [2022-02-24 01:38:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:48,484 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-24 01:38:48,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-24 01:38:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:48,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:48,484 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:48,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-24 01:38:48,484 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash -45607125, now seen corresponding path program 132 times [2022-02-24 01:38:48,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:48,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272308333] [2022-02-24 01:38:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:48,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:48,494 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:48,494 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:48,494 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:48,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:48,679 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:48,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272308333] [2022-02-24 01:38:48,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1272308333] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:48,679 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:48,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:48,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9232360] [2022-02-24 01:38:48,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:48,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:48,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:48,680 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:49,245 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:38:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:49,245 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:49,246 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:38:49,246 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:38:49,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:49,246 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:49,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:38:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 133. [2022-02-24 01:38:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-24 01:38:49,360 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 44 [2022-02-24 01:38:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:49,360 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-24 01:38:49,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-24 01:38:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:49,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:49,361 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:49,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-24 01:38:49,361 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash -819593557, now seen corresponding path program 133 times [2022-02-24 01:38:49,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:49,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501687123] [2022-02-24 01:38:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:49,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:49,363 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:49,363 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:49,363 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:49,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:49,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:49,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501687123] [2022-02-24 01:38:49,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [501687123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:49,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:49,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:49,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660289060] [2022-02-24 01:38:49,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:49,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:49,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:49,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:49,521 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:49,961 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:38:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:49,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:49,962 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:38:49,962 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:38:49,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:49,962 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:49,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:38:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 135. [2022-02-24 01:38:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-24 01:38:50,051 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 44 [2022-02-24 01:38:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:50,051 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-24 01:38:50,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-24 01:38:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:50,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:50,051 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:50,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-24 01:38:50,052 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1591212501, now seen corresponding path program 134 times [2022-02-24 01:38:50,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:50,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446391237] [2022-02-24 01:38:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:50,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:50,053 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:50,053 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:50,053 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:50,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:50,211 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:50,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446391237] [2022-02-24 01:38:50,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [446391237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:50,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:50,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:50,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179603578] [2022-02-24 01:38:50,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:50,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:50,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:50,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:50,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:50,212 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:50,660 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:38:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:50,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:50,661 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:38:50,661 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:38:50,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:50,661 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:50,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:38:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 137. [2022-02-24 01:38:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-24 01:38:50,749 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 44 [2022-02-24 01:38:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:50,749 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-24 01:38:50,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-24 01:38:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:38:50,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:50,750 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:50,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-24 01:38:50,750 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:50,750 INFO L85 PathProgramCache]: Analyzing trace with hash -87675477, now seen corresponding path program 135 times [2022-02-24 01:38:50,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:50,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351339538] [2022-02-24 01:38:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:50,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:50,752 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:50,752 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:50,752 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:50,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:50,927 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:50,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351339538] [2022-02-24 01:38:50,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [351339538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:50,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:50,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:38:50,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529674190] [2022-02-24 01:38:50,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:50,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:38:50,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:50,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:38:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:38:50,928 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:51,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:51,350 INFO L93 Difference]: Finished difference Result 174 states and 251 transitions. [2022-02-24 01:38:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:38:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:38:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:51,351 INFO L225 Difference]: With dead ends: 174 [2022-02-24 01:38:51,351 INFO L226 Difference]: Without dead ends: 168 [2022-02-24 01:38:51,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:38:51,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:51,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-24 01:38:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 109. [2022-02-24 01:38:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-02-24 01:38:51,419 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 44 [2022-02-24 01:38:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:51,419 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-02-24 01:38:51,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-02-24 01:38:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:51,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:51,419 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:51,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-24 01:38:51,419 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1612472270, now seen corresponding path program 136 times [2022-02-24 01:38:51,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:51,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506159231] [2022-02-24 01:38:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:51,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:51,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:51,421 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:51,421 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:51,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:51,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:51,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506159231] [2022-02-24 01:38:51,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [506159231] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:51,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:51,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:51,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523233356] [2022-02-24 01:38:51,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:51,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:51,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:51,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:51,599 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:52,021 INFO L93 Difference]: Finished difference Result 124 states and 177 transitions. [2022-02-24 01:38:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:52,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:52,021 INFO L225 Difference]: With dead ends: 124 [2022-02-24 01:38:52,021 INFO L226 Difference]: Without dead ends: 118 [2022-02-24 01:38:52,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:52,022 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:52,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 25 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-24 01:38:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2022-02-24 01:38:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-24 01:38:52,093 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 46 [2022-02-24 01:38:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:52,094 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-24 01:38:52,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-24 01:38:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:52,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:52,094 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:52,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-24 01:38:52,094 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash 517523278, now seen corresponding path program 137 times [2022-02-24 01:38:52,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:52,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838887576] [2022-02-24 01:38:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:52,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:52,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:52,096 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:52,096 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:52,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:52,279 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:52,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838887576] [2022-02-24 01:38:52,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838887576] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:52,279 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:52,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:52,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976882348] [2022-02-24 01:38:52,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:52,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:52,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:52,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:52,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:52,279 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:52,705 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-24 01:38:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:52,705 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:52,706 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:38:52,706 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:38:52,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:52,706 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:52,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:38:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2022-02-24 01:38:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-02-24 01:38:52,781 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 46 [2022-02-24 01:38:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:52,781 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-02-24 01:38:52,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-02-24 01:38:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:52,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:52,781 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:52,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-02-24 01:38:52,782 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:52,782 INFO L85 PathProgramCache]: Analyzing trace with hash 538529486, now seen corresponding path program 138 times [2022-02-24 01:38:52,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:52,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554810227] [2022-02-24 01:38:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:52,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:52,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:52,783 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:52,783 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:52,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:52,957 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:52,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554810227] [2022-02-24 01:38:52,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [554810227] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:52,957 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:52,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:52,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608830293] [2022-02-24 01:38:52,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:52,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:52,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:52,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:52,958 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:53,381 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-24 01:38:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:53,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:53,381 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:38:53,381 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:38:53,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:53,382 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:53,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:38:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2022-02-24 01:38:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-24 01:38:53,457 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 46 [2022-02-24 01:38:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:53,458 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-24 01:38:53,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-24 01:38:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:53,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:53,458 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:53,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-02-24 01:38:53,458 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:53,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash -749341106, now seen corresponding path program 139 times [2022-02-24 01:38:53,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:53,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314970160] [2022-02-24 01:38:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:53,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:53,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:53,460 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:53,460 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:53,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:53,641 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:53,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314970160] [2022-02-24 01:38:53,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [314970160] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:53,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:53,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:53,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514650575] [2022-02-24 01:38:53,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:53,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:53,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:53,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:53,642 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:54,063 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-24 01:38:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:54,063 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:54,063 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:38:54,063 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:38:54,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:54,064 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:54,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 15 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:38:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2022-02-24 01:38:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-24 01:38:54,144 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 46 [2022-02-24 01:38:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:54,144 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-24 01:38:54,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-24 01:38:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:54,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:54,144 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:54,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-02-24 01:38:54,144 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1442398770, now seen corresponding path program 140 times [2022-02-24 01:38:54,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:54,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086862599] [2022-02-24 01:38:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:54,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:54,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:54,146 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:54,146 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:54,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:54,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:54,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086862599] [2022-02-24 01:38:54,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086862599] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:54,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:54,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:54,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351394342] [2022-02-24 01:38:54,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:54,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:54,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:54,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:54,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:54,331 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:54,807 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-24 01:38:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:54,808 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:54,808 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:38:54,808 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:38:54,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:54,809 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:54,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:38:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2022-02-24 01:38:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-02-24 01:38:54,888 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 46 [2022-02-24 01:38:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:54,889 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-02-24 01:38:54,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-02-24 01:38:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:54,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:54,889 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:54,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-02-24 01:38:54,889 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1750882994, now seen corresponding path program 141 times [2022-02-24 01:38:54,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:54,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928103818] [2022-02-24 01:38:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:54,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:54,891 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:54,891 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:55,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:55,078 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:55,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928103818] [2022-02-24 01:38:55,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928103818] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:55,078 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:55,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:55,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210953161] [2022-02-24 01:38:55,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:55,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:55,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:55,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:55,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:55,079 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:55,531 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:38:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:55,532 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:38:55,532 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:38:55,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:55,532 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:55,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:38:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 125. [2022-02-24 01:38:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-24 01:38:55,616 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 46 [2022-02-24 01:38:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:55,617 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-24 01:38:55,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-24 01:38:55,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:55,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:55,617 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:55,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-02-24 01:38:55,617 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1851478834, now seen corresponding path program 142 times [2022-02-24 01:38:55,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:55,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867377343] [2022-02-24 01:38:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:55,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:55,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:55,619 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:55,619 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:55,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:55,795 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:55,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867377343] [2022-02-24 01:38:55,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867377343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:55,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:55,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:55,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133036855] [2022-02-24 01:38:55,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:55,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:55,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:55,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:55,796 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:56,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:56,244 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:38:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:56,244 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:56,244 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:38:56,244 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:38:56,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:56,245 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:56,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:38:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2022-02-24 01:38:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-24 01:38:56,328 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 46 [2022-02-24 01:38:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:56,329 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-24 01:38:56,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:56,329 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-24 01:38:56,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:56,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:56,329 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:56,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-02-24 01:38:56,329 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash 260166734, now seen corresponding path program 143 times [2022-02-24 01:38:56,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:56,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094513824] [2022-02-24 01:38:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:56,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:56,331 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:56,331 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:56,331 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:56,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:56,501 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:56,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094513824] [2022-02-24 01:38:56,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094513824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:56,501 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:56,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:56,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144869190] [2022-02-24 01:38:56,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:56,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:56,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:56,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:56,502 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:56,959 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:38:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:56,960 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:38:56,960 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:38:56,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:56,960 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:56,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 22 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:38:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2022-02-24 01:38:57,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-24 01:38:57,052 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 46 [2022-02-24 01:38:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:57,052 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-24 01:38:57,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-24 01:38:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:57,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:57,052 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:57,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-02-24 01:38:57,052 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1967973426, now seen corresponding path program 144 times [2022-02-24 01:38:57,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:57,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011915609] [2022-02-24 01:38:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:57,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:57,054 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:57,054 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:57,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:57,249 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:57,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011915609] [2022-02-24 01:38:57,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2011915609] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:57,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:57,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:57,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366411397] [2022-02-24 01:38:57,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:57,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:57,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:57,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:57,250 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:57,711 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:38:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:57,711 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:57,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:57,712 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:38:57,712 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:38:57,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:57,712 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:57,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:38:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 131. [2022-02-24 01:38:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-24 01:38:57,805 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 46 [2022-02-24 01:38:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:57,805 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-24 01:38:57,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-24 01:38:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:57,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:57,805 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:57,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-02-24 01:38:57,805 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash -21986482, now seen corresponding path program 145 times [2022-02-24 01:38:57,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:57,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211202527] [2022-02-24 01:38:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:57,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:57,807 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:57,807 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:57,807 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:57,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:57,987 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:57,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211202527] [2022-02-24 01:38:57,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211202527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:57,987 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:57,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:57,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510497261] [2022-02-24 01:38:57,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:57,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:57,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:57,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:57,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:57,988 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:58,455 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:38:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:58,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:58,456 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:38:58,456 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:38:58,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:58,457 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:58,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:38:58,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 133. [2022-02-24 01:38:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-24 01:38:58,548 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 46 [2022-02-24 01:38:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:58,548 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-24 01:38:58,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-24 01:38:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:58,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:58,549 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:58,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-02-24 01:38:58,549 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:58,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1760692942, now seen corresponding path program 146 times [2022-02-24 01:38:58,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:58,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984362601] [2022-02-24 01:38:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:58,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:58,551 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:58,551 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:58,551 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:58,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:58,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:58,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984362601] [2022-02-24 01:38:58,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1984362601] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:58,725 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:58,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:58,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179020877] [2022-02-24 01:38:58,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:58,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:58,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:58,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:58,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:58,725 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:59,198 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:38:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:59,199 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:38:59,199 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:38:59,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:59,200 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:59,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:38:59,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 135. [2022-02-24 01:38:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-24 01:38:59,315 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 46 [2022-02-24 01:38:59,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:38:59,315 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-24 01:38:59,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:59,315 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-24 01:38:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:38:59,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:38:59,315 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:38:59,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-02-24 01:38:59,315 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:38:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:38:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1223668302, now seen corresponding path program 147 times [2022-02-24 01:38:59,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:38:59,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908722519] [2022-02-24 01:38:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:38:59,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:38:59,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:38:59,317 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:38:59,317 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:38:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:59,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:38:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:38:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:38:59,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:38:59,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908722519] [2022-02-24 01:38:59,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1908722519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:38:59,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:38:59,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:38:59,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831166205] [2022-02-24 01:38:59,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:38:59,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:38:59,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:38:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:38:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:38:59,493 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:38:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:38:59,987 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:38:59,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:38:59,988 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:38:59,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:38:59,988 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:38:59,988 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:38:59,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:38:59,989 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:38:59,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:38:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:39:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 137. [2022-02-24 01:39:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-24 01:39:00,091 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 46 [2022-02-24 01:39:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:00,091 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-24 01:39:00,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-24 01:39:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:39:00,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:00,092 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:00,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-02-24 01:39:00,092 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash 539064782, now seen corresponding path program 148 times [2022-02-24 01:39:00,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:00,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623736240] [2022-02-24 01:39:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:00,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:00,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:00,095 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:00,095 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:00,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:00,306 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:00,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623736240] [2022-02-24 01:39:00,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [623736240] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:00,306 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:00,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:39:00,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969921245] [2022-02-24 01:39:00,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:00,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:39:00,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:39:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:39:00,307 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:00,939 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:39:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:39:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:39:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:00,940 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:39:00,940 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:39:00,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:39:00,940 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:00,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:39:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2022-02-24 01:39:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-24 01:39:01,092 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 46 [2022-02-24 01:39:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:01,092 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-24 01:39:01,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-24 01:39:01,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:39:01,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:01,093 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:01,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-02-24 01:39:01,093 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash -234921650, now seen corresponding path program 149 times [2022-02-24 01:39:01,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:01,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568224424] [2022-02-24 01:39:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:01,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:01,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:01,096 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:01,096 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:01,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:01,291 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:01,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568224424] [2022-02-24 01:39:01,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568224424] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:01,291 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:01,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:39:01,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322999262] [2022-02-24 01:39:01,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:01,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:39:01,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:39:01,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:39:01,292 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:01,835 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:39:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:39:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:39:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:01,836 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:39:01,836 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:39:01,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:39:01,836 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:01,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:39:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 141. [2022-02-24 01:39:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-24 01:39:01,942 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 46 [2022-02-24 01:39:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:01,943 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-24 01:39:01,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-24 01:39:01,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:39:01,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:01,943 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:01,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-02-24 01:39:01,943 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1006540594, now seen corresponding path program 150 times [2022-02-24 01:39:01,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:01,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662831073] [2022-02-24 01:39:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:01,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:01,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:01,947 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:01,947 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:02,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:02,126 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:02,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662831073] [2022-02-24 01:39:02,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [662831073] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:02,126 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:02,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:39:02,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980900755] [2022-02-24 01:39:02,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:02,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:39:02,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:02,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:39:02,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:39:02,127 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:02,637 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:39:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:39:02,638 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:39:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:02,638 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:39:02,638 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:39:02,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:39:02,639 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:02,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:39:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2022-02-24 01:39:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-24 01:39:02,747 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 46 [2022-02-24 01:39:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:02,747 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-24 01:39:02,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-24 01:39:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:39:02,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:02,747 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:02,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-02-24 01:39:02,747 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash 496996430, now seen corresponding path program 151 times [2022-02-24 01:39:02,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:02,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379107310] [2022-02-24 01:39:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:02,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:02,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:02,750 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:02,750 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:02,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:02,933 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:02,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379107310] [2022-02-24 01:39:02,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379107310] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:02,934 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:02,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:39:02,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386928171] [2022-02-24 01:39:02,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:02,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:39:02,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:39:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:39:02,934 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:03,448 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:39:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:39:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:39:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:03,449 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:39:03,449 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:39:03,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:39:03,450 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:03,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:39:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 145. [2022-02-24 01:39:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-24 01:39:03,558 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 46 [2022-02-24 01:39:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:03,558 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-24 01:39:03,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-24 01:39:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:39:03,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:03,558 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:03,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-02-24 01:39:03,559 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2007902258, now seen corresponding path program 152 times [2022-02-24 01:39:03,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:03,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394327924] [2022-02-24 01:39:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:03,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:03,561 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:03,561 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:03,561 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:03,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:03,736 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:03,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394327924] [2022-02-24 01:39:03,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394327924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:03,737 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:03,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:39:03,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454814702] [2022-02-24 01:39:03,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:03,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:39:03,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:03,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:39:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:39:03,737 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:04,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:04,228 INFO L93 Difference]: Finished difference Result 184 states and 266 transitions. [2022-02-24 01:39:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:39:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:39:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:04,228 INFO L225 Difference]: With dead ends: 184 [2022-02-24 01:39:04,228 INFO L226 Difference]: Without dead ends: 178 [2022-02-24 01:39:04,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:39:04,229 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:04,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-24 01:39:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 115. [2022-02-24 01:39:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-02-24 01:39:04,305 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 46 [2022-02-24 01:39:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:04,305 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-02-24 01:39:04,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-02-24 01:39:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:04,306 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:04,306 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:04,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-02-24 01:39:04,306 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash 841459121, now seen corresponding path program 153 times [2022-02-24 01:39:04,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:04,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380765905] [2022-02-24 01:39:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:04,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:04,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:04,308 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:04,308 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:04,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:04,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:04,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380765905] [2022-02-24 01:39:04,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [380765905] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:04,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:04,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:04,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983001048] [2022-02-24 01:39:04,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:04,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:04,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:04,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:04,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:04,516 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:04,992 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2022-02-24 01:39:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:04,992 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:04,993 INFO L225 Difference]: With dead ends: 130 [2022-02-24 01:39:04,993 INFO L226 Difference]: Without dead ends: 124 [2022-02-24 01:39:04,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:04,993 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:04,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 21 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-24 01:39:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-02-24 01:39:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-24 01:39:05,114 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 48 [2022-02-24 01:39:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:05,115 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-24 01:39:05,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-24 01:39:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:05,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:05,115 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:05,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-02-24 01:39:05,115 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash -253489871, now seen corresponding path program 154 times [2022-02-24 01:39:05,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:05,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876542635] [2022-02-24 01:39:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:05,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:05,118 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:05,118 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:05,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:05,321 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:05,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876542635] [2022-02-24 01:39:05,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [876542635] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:05,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:05,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:05,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675116130] [2022-02-24 01:39:05,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:05,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:05,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:05,322 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:05,800 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-24 01:39:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:05,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:05,801 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:39:05,801 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:39:05,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:05,801 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:05,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:39:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-02-24 01:39:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-02-24 01:39:05,891 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 48 [2022-02-24 01:39:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:05,891 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-02-24 01:39:05,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-02-24 01:39:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:05,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:05,892 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:05,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-02-24 01:39:05,892 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash -232483663, now seen corresponding path program 155 times [2022-02-24 01:39:05,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:05,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399532984] [2022-02-24 01:39:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:05,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:05,894 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:05,894 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:05,894 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:06,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:06,083 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:06,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399532984] [2022-02-24 01:39:06,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399532984] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:06,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:06,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:06,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936690746] [2022-02-24 01:39:06,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:06,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:06,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:06,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:06,084 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:06,579 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-24 01:39:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:06,580 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:39:06,580 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:39:06,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:06,581 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:06,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:39:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2022-02-24 01:39:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-24 01:39:06,671 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 48 [2022-02-24 01:39:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:06,671 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-24 01:39:06,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-24 01:39:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:06,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:06,672 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:06,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-02-24 01:39:06,672 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1520354255, now seen corresponding path program 156 times [2022-02-24 01:39:06,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:06,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190053974] [2022-02-24 01:39:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:06,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:06,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:06,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:06,674 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:06,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:06,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:06,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190053974] [2022-02-24 01:39:06,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [190053974] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:06,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:06,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:06,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720630445] [2022-02-24 01:39:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:06,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:06,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:06,864 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:07,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:07,365 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-24 01:39:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:07,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:07,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:07,365 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:39:07,366 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:39:07,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:07,366 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:07,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:39:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2022-02-24 01:39:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-24 01:39:07,460 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 48 [2022-02-24 01:39:07,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:07,460 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-24 01:39:07,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-24 01:39:07,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:07,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:07,461 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:07,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-02-24 01:39:07,461 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2081555377, now seen corresponding path program 157 times [2022-02-24 01:39:07,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:07,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931477010] [2022-02-24 01:39:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:07,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:07,463 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:07,463 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:07,463 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:07,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:07,652 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:07,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931477010] [2022-02-24 01:39:07,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [931477010] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:07,653 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:07,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:07,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145846782] [2022-02-24 01:39:07,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:07,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:07,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:07,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:07,653 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:08,136 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:39:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:08,136 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:08,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:08,137 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:39:08,137 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:39:08,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:08,137 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:08,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:39:08,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2022-02-24 01:39:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-24 01:39:08,231 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 48 [2022-02-24 01:39:08,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:08,232 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-24 01:39:08,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-24 01:39:08,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:08,232 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:08,232 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:08,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-02-24 01:39:08,232 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1773071153, now seen corresponding path program 158 times [2022-02-24 01:39:08,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:08,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490627741] [2022-02-24 01:39:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:08,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:08,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:08,234 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:08,234 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:08,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:08,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:08,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490627741] [2022-02-24 01:39:08,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [490627741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:08,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:08,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:08,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296403033] [2022-02-24 01:39:08,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:08,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:08,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:08,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:08,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:08,420 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:08,907 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:39:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:08,907 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:39:08,907 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:39:08,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:08,908 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:08,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:08,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:39:09,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 131. [2022-02-24 01:39:09,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-24 01:39:09,003 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 48 [2022-02-24 01:39:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:09,003 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-24 01:39:09,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:09,003 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-24 01:39:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:09,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:09,003 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:09,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-02-24 01:39:09,004 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:09,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1672475313, now seen corresponding path program 159 times [2022-02-24 01:39:09,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:09,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258734355] [2022-02-24 01:39:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:09,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:09,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:09,005 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:09,005 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:09,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:09,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:09,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258734355] [2022-02-24 01:39:09,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [258734355] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:09,192 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:09,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:09,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152802730] [2022-02-24 01:39:09,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:09,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:09,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:09,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:09,192 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:09,679 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:39:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:09,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:09,680 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:39:09,680 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:39:09,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:09,681 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:09,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:39:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-02-24 01:39:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-24 01:39:09,780 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 48 [2022-02-24 01:39:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:09,780 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-24 01:39:09,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-24 01:39:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:09,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:09,780 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:09,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-02-24 01:39:09,781 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash -510846415, now seen corresponding path program 160 times [2022-02-24 01:39:09,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:09,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606484284] [2022-02-24 01:39:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:09,782 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:09,782 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:09,782 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:09,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:09,970 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:09,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606484284] [2022-02-24 01:39:09,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [606484284] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:09,970 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:09,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:09,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650495977] [2022-02-24 01:39:09,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:09,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:09,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:09,971 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:10,467 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:39:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:10,468 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:39:10,468 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:39:10,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:10,468 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:10,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:39:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 135. [2022-02-24 01:39:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-24 01:39:10,570 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 48 [2022-02-24 01:39:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:10,570 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-24 01:39:10,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-24 01:39:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:10,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:10,570 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:10,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-02-24 01:39:10,570 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:10,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1555980721, now seen corresponding path program 161 times [2022-02-24 01:39:10,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:10,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826618955] [2022-02-24 01:39:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:10,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:10,572 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:10,572 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:10,572 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:10,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:10,776 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:10,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826618955] [2022-02-24 01:39:10,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826618955] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:10,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:10,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:10,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850190116] [2022-02-24 01:39:10,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:10,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:10,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:10,778 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:11,286 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:39:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:11,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:11,287 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:39:11,287 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:39:11,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:11,288 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:11,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:39:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-02-24 01:39:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-24 01:39:11,396 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 48 [2022-02-24 01:39:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:11,396 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-24 01:39:11,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-24 01:39:11,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:11,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:11,397 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:11,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-02-24 01:39:11,397 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:11,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash -792999631, now seen corresponding path program 162 times [2022-02-24 01:39:11,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:11,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922404495] [2022-02-24 01:39:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:11,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:11,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:11,399 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:11,399 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:11,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:11,628 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:11,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922404495] [2022-02-24 01:39:11,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [922404495] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:11,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:11,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:11,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481313385] [2022-02-24 01:39:11,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:11,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:11,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:11,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:11,629 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:12,147 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:39:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:12,148 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:12,148 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:39:12,148 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:39:12,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:12,149 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:12,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:39:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 139. [2022-02-24 01:39:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-24 01:39:12,258 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 48 [2022-02-24 01:39:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:12,259 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-24 01:39:12,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-24 01:39:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:12,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:12,259 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:12,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-02-24 01:39:12,259 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash 989679793, now seen corresponding path program 163 times [2022-02-24 01:39:12,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:12,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159919438] [2022-02-24 01:39:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:12,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:12,261 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:12,261 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:12,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:12,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:12,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159919438] [2022-02-24 01:39:12,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [159919438] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:12,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:12,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:12,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301439823] [2022-02-24 01:39:12,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:12,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:12,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:12,451 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:12,971 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:39:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:12,971 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:39:12,971 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:39:12,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:12,972 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:12,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:39:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2022-02-24 01:39:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-24 01:39:13,083 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 48 [2022-02-24 01:39:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:13,083 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-24 01:39:13,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-24 01:39:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:13,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:13,084 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:13,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-02-24 01:39:13,084 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:13,084 INFO L85 PathProgramCache]: Analyzing trace with hash 452655153, now seen corresponding path program 164 times [2022-02-24 01:39:13,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:13,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690228093] [2022-02-24 01:39:13,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:13,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:13,092 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:13,092 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:13,092 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:13,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:13,317 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:13,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690228093] [2022-02-24 01:39:13,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [690228093] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:13,317 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:13,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:13,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331701694] [2022-02-24 01:39:13,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:13,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:13,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:13,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:13,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:13,318 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:13,941 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:39:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:13,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:13,942 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:39:13,942 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:39:13,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:13,942 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:13,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:39:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 143. [2022-02-24 01:39:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-24 01:39:14,055 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 48 [2022-02-24 01:39:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:14,056 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-24 01:39:14,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-24 01:39:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:14,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:14,056 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:14,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-02-24 01:39:14,056 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash -231948367, now seen corresponding path program 165 times [2022-02-24 01:39:14,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:14,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495020388] [2022-02-24 01:39:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:14,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:14,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:14,058 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:14,058 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:14,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:14,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:14,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495020388] [2022-02-24 01:39:14,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1495020388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:14,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:14,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:14,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939241604] [2022-02-24 01:39:14,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:14,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:14,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:14,246 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:14,779 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:39:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:14,779 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:14,780 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:39:14,780 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:39:14,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:14,781 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:14,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:14,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:39:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2022-02-24 01:39:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-24 01:39:14,908 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 48 [2022-02-24 01:39:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:14,909 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-24 01:39:14,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-24 01:39:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:14,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:14,909 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:14,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-02-24 01:39:14,909 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1005934799, now seen corresponding path program 166 times [2022-02-24 01:39:14,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:14,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588743613] [2022-02-24 01:39:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:14,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:14,911 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:14,911 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:14,911 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:15,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:15,099 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:15,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588743613] [2022-02-24 01:39:15,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [588743613] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:15,099 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:15,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:15,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629523365] [2022-02-24 01:39:15,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:15,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:15,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:15,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:15,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:15,100 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:15,636 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:39:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:15,637 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:39:15,637 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:39:15,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:15,638 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:15,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 17 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:39:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2022-02-24 01:39:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-24 01:39:15,757 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 48 [2022-02-24 01:39:15,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:15,757 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-24 01:39:15,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:15,757 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-24 01:39:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:15,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:15,758 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:15,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-02-24 01:39:15,758 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:15,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1777553743, now seen corresponding path program 167 times [2022-02-24 01:39:15,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:15,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268271677] [2022-02-24 01:39:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:15,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:15,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:15,762 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:15,762 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:15,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:15,984 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:15,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268271677] [2022-02-24 01:39:15,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268271677] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:15,985 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:15,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:15,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872403085] [2022-02-24 01:39:15,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:15,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:15,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:15,985 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:16,531 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:39:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:16,531 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:39:16,531 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:39:16,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:16,532 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:16,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 25 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:39:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 149. [2022-02-24 01:39:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-24 01:39:16,648 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 48 [2022-02-24 01:39:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:16,648 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-24 01:39:16,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-24 01:39:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:16,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:16,649 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:16,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-02-24 01:39:16,649 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:16,649 INFO L85 PathProgramCache]: Analyzing trace with hash -274016719, now seen corresponding path program 168 times [2022-02-24 01:39:16,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:16,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90583790] [2022-02-24 01:39:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:16,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:16,651 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:16,651 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:16,651 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:16,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:16,882 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:16,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90583790] [2022-02-24 01:39:16,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [90583790] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:16,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:16,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:16,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722075425] [2022-02-24 01:39:16,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:16,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:16,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:16,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:16,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:16,883 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:17,438 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:39:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:17,438 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:17,438 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:39:17,438 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:39:17,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:17,439 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:17,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:39:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 151. [2022-02-24 01:39:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-24 01:39:17,560 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 48 [2022-02-24 01:39:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:17,561 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-24 01:39:17,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-24 01:39:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:17,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:17,561 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:17,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-02-24 01:39:17,561 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1516051889, now seen corresponding path program 169 times [2022-02-24 01:39:17,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:17,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74020758] [2022-02-24 01:39:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:17,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:17,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:17,563 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:17,563 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:17,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:17,796 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:17,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74020758] [2022-02-24 01:39:17,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [74020758] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:17,796 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:17,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:17,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100736758] [2022-02-24 01:39:17,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:17,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:17,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:17,797 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:18,364 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:39:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:18,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:18,365 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:39:18,365 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:39:18,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:18,365 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:18,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:39:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 153. [2022-02-24 01:39:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-24 01:39:18,487 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 48 [2022-02-24 01:39:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:18,488 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-24 01:39:18,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-24 01:39:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:39:18,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:18,488 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:18,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-02-24 01:39:18,488 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -509901519, now seen corresponding path program 170 times [2022-02-24 01:39:18,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:18,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254542253] [2022-02-24 01:39:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:18,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:18,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:18,490 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:18,490 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:18,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:18,688 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:18,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254542253] [2022-02-24 01:39:18,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254542253] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:18,688 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:18,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:39:18,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810575413] [2022-02-24 01:39:18,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:18,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:39:18,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:18,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:39:18,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:39:18,689 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:19,198 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:39:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:39:19,199 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:39:19,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:19,199 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:39:19,199 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:39:19,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:39:19,199 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:19,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 17 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:39:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 121. [2022-02-24 01:39:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-24 01:39:19,288 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 48 [2022-02-24 01:39:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:19,288 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-24 01:39:19,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-24 01:39:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:19,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:19,289 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:19,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2022-02-24 01:39:19,289 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:19,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1367802156, now seen corresponding path program 171 times [2022-02-24 01:39:19,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:19,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119895124] [2022-02-24 01:39:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:19,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:19,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:19,291 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:19,291 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:19,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:19,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:19,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119895124] [2022-02-24 01:39:19,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119895124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:19,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:19,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:19,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061499369] [2022-02-24 01:39:19,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:19,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:19,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:19,494 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:20,001 INFO L93 Difference]: Finished difference Result 136 states and 195 transitions. [2022-02-24 01:39:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:20,002 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:20,002 INFO L225 Difference]: With dead ends: 136 [2022-02-24 01:39:20,002 INFO L226 Difference]: Without dead ends: 130 [2022-02-24 01:39:20,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:20,002 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:20,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 21 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-24 01:39:20,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-02-24 01:39:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-24 01:39:20,092 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 50 [2022-02-24 01:39:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:20,092 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-24 01:39:20,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-24 01:39:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:20,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:20,092 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:20,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-02-24 01:39:20,093 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1832216148, now seen corresponding path program 172 times [2022-02-24 01:39:20,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:20,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720500768] [2022-02-24 01:39:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:20,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:20,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:20,094 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:20,094 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:20,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:20,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:20,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720500768] [2022-02-24 01:39:20,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720500768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:20,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:20,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:20,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758626432] [2022-02-24 01:39:20,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:20,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:20,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:20,324 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:20,815 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-24 01:39:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:20,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:20,816 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:39:20,816 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:39:20,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:20,817 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:20,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:20,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:39:20,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-02-24 01:39:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-24 01:39:20,963 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 50 [2022-02-24 01:39:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:20,964 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-24 01:39:20,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-24 01:39:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:20,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:20,964 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:20,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-02-24 01:39:20,964 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1853222356, now seen corresponding path program 173 times [2022-02-24 01:39:20,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:20,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031505418] [2022-02-24 01:39:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:20,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:20,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:20,967 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:20,967 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:21,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:21,199 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:21,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031505418] [2022-02-24 01:39:21,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031505418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:21,199 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:21,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:21,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982084395] [2022-02-24 01:39:21,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:21,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:21,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:21,199 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:21,705 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-24 01:39:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:21,705 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:21,705 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:39:21,705 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:39:21,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:21,706 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:21,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:21,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:39:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 131. [2022-02-24 01:39:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-24 01:39:21,807 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 50 [2022-02-24 01:39:21,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:21,807 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-24 01:39:21,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-24 01:39:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:21,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:21,808 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:21,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2022-02-24 01:39:21,808 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:21,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:21,808 INFO L85 PathProgramCache]: Analyzing trace with hash 565351764, now seen corresponding path program 174 times [2022-02-24 01:39:21,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:21,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361548599] [2022-02-24 01:39:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:21,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:21,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:21,810 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:21,810 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:22,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:22,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:22,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361548599] [2022-02-24 01:39:22,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361548599] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:22,015 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:22,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:22,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115400838] [2022-02-24 01:39:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:22,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:22,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:22,016 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:22,529 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:39:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:22,529 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:22,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:22,530 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:39:22,530 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:39:22,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:22,530 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:22,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:39:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2022-02-24 01:39:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-24 01:39:22,631 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 50 [2022-02-24 01:39:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:22,632 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-24 01:39:22,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-24 01:39:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:22,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:22,632 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:22,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2022-02-24 01:39:22,632 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash -127705900, now seen corresponding path program 175 times [2022-02-24 01:39:22,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:22,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960457181] [2022-02-24 01:39:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:22,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:22,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:22,637 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:22,637 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:22,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:22,837 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:22,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960457181] [2022-02-24 01:39:22,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1960457181] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:22,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:22,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:22,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916950681] [2022-02-24 01:39:22,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:22,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:22,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:22,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:22,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:22,838 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:23,350 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:39:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:23,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:23,351 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:39:23,351 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:39:23,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:23,352 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:23,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:39:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2022-02-24 01:39:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-24 01:39:23,459 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 50 [2022-02-24 01:39:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:23,459 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-24 01:39:23,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-24 01:39:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:23,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:23,460 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:23,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-02-24 01:39:23,460 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash -436190124, now seen corresponding path program 176 times [2022-02-24 01:39:23,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:23,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547845885] [2022-02-24 01:39:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:23,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:23,462 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:23,462 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:23,462 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:23,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:23,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:23,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547845885] [2022-02-24 01:39:23,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547845885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:23,665 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:23,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:23,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670221977] [2022-02-24 01:39:23,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:23,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:23,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:23,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:23,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:23,665 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:24,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:24,189 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:39:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:24,189 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:39:24,189 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:39:24,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:24,190 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:24,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 23 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:39:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2022-02-24 01:39:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-24 01:39:24,301 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 50 [2022-02-24 01:39:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:24,302 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-24 01:39:24,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-24 01:39:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:24,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:24,302 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:24,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-02-24 01:39:24,302 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash -536785964, now seen corresponding path program 177 times [2022-02-24 01:39:24,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:24,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048933316] [2022-02-24 01:39:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:24,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:24,304 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:24,304 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:24,304 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:24,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:24,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048933316] [2022-02-24 01:39:24,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2048933316] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:24,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:24,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:24,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857815791] [2022-02-24 01:39:24,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:24,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:24,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:24,522 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:25,053 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:39:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:25,053 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:25,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:25,053 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:39:25,053 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:39:25,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:25,054 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:25,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:39:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 139. [2022-02-24 01:39:25,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-24 01:39:25,167 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 50 [2022-02-24 01:39:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:25,167 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-24 01:39:25,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-24 01:39:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:25,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:25,167 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:25,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2022-02-24 01:39:25,168 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1574859604, now seen corresponding path program 178 times [2022-02-24 01:39:25,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:25,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608920848] [2022-02-24 01:39:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:25,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:25,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:25,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:25,170 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:25,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:25,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:25,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608920848] [2022-02-24 01:39:25,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608920848] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:25,421 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:25,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:25,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818673897] [2022-02-24 01:39:25,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:25,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:25,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:25,422 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:25,980 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:39:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:25,980 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:25,981 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:39:25,981 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:39:25,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:25,983 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:25,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:39:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2022-02-24 01:39:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-24 01:39:26,102 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 50 [2022-02-24 01:39:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:26,102 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-24 01:39:26,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-24 01:39:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:26,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:26,102 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:26,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-02-24 01:39:26,102 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:26,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:26,103 INFO L85 PathProgramCache]: Analyzing trace with hash -653280556, now seen corresponding path program 179 times [2022-02-24 01:39:26,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:26,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094909798] [2022-02-24 01:39:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:26,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:26,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:26,104 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:26,104 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:26,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:26,321 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:26,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094909798] [2022-02-24 01:39:26,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2094909798] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:26,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:26,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:26,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741713586] [2022-02-24 01:39:26,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:26,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:26,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:26,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:26,322 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:26,870 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:39:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:26,870 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:26,871 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:39:26,871 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:39:26,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:26,871 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:26,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:39:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2022-02-24 01:39:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-24 01:39:26,991 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 50 [2022-02-24 01:39:26,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:26,992 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-24 01:39:26,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-24 01:39:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:26,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:26,992 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:26,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-02-24 01:39:26,992 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1292706388, now seen corresponding path program 180 times [2022-02-24 01:39:26,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:26,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5492546] [2022-02-24 01:39:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:26,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:26,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:26,994 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:26,994 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:27,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:27,232 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:27,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5492546] [2022-02-24 01:39:27,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [5492546] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:27,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:27,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:27,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623789908] [2022-02-24 01:39:27,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:27,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:27,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:27,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:27,233 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:27,810 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:39:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:27,811 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:27,811 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:39:27,811 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:39:27,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:27,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:27,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 23 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:39:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2022-02-24 01:39:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-24 01:39:27,937 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 50 [2022-02-24 01:39:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:27,937 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-24 01:39:27,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-24 01:39:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:27,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:27,938 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:27,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2022-02-24 01:39:27,938 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:27,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1219581484, now seen corresponding path program 181 times [2022-02-24 01:39:27,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:27,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885379002] [2022-02-24 01:39:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:27,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:27,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:27,940 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:27,940 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:28,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:28,152 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:28,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885379002] [2022-02-24 01:39:28,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885379002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:28,152 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:28,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:28,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693850306] [2022-02-24 01:39:28,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:28,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:28,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:28,153 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:28,729 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:39:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:28,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:28,729 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:39:28,729 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:39:28,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:28,731 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:28,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:39:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2022-02-24 01:39:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-24 01:39:28,858 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 50 [2022-02-24 01:39:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:28,858 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-24 01:39:28,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-24 01:39:28,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:28,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:28,859 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:28,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2022-02-24 01:39:28,859 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:28,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1756606124, now seen corresponding path program 182 times [2022-02-24 01:39:28,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:28,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953166663] [2022-02-24 01:39:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:28,861 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:28,861 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:28,861 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:29,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:29,062 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:29,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953166663] [2022-02-24 01:39:29,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [953166663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:29,062 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:29,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:29,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416326445] [2022-02-24 01:39:29,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:29,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:29,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:29,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:29,063 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:29,638 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:39:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:29,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:29,639 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:39:29,639 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:39:29,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:29,639 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:29,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 15 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:39:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 149. [2022-02-24 01:39:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-24 01:39:29,769 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 50 [2022-02-24 01:39:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:29,769 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-24 01:39:29,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-24 01:39:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:29,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:29,769 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:29,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-02-24 01:39:29,769 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:29,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1853757652, now seen corresponding path program 183 times [2022-02-24 01:39:29,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:29,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876732364] [2022-02-24 01:39:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:29,772 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:29,772 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:29,772 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:29,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:29,977 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:29,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876732364] [2022-02-24 01:39:29,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876732364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:29,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:29,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:29,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417045757] [2022-02-24 01:39:29,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:29,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:29,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:29,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:29,978 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:30,566 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:39:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:30,566 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:39:30,566 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:39:30,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:30,567 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:30,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:39:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 151. [2022-02-24 01:39:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-24 01:39:30,698 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 50 [2022-02-24 01:39:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:30,699 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-24 01:39:30,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-24 01:39:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:30,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:30,699 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:30,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-02-24 01:39:30,699 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1079771220, now seen corresponding path program 184 times [2022-02-24 01:39:30,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:30,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730316082] [2022-02-24 01:39:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:30,701 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:30,701 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:30,701 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:30,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:30,922 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:30,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730316082] [2022-02-24 01:39:30,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [730316082] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:30,922 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:30,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:30,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096660527] [2022-02-24 01:39:30,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:30,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:30,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:30,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:30,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:30,923 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:31,518 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:39:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:31,519 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:31,519 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:39:31,519 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:39:31,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:31,520 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:31,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:39:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 153. [2022-02-24 01:39:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-24 01:39:31,654 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 50 [2022-02-24 01:39:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:31,654 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-24 01:39:31,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-24 01:39:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:31,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:31,654 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:31,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2022-02-24 01:39:31,654 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 308152276, now seen corresponding path program 185 times [2022-02-24 01:39:31,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:31,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226914042] [2022-02-24 01:39:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:31,656 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:31,656 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:31,656 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:31,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:31,858 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:31,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226914042] [2022-02-24 01:39:31,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226914042] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:31,858 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:31,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:31,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267004852] [2022-02-24 01:39:31,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:31,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:31,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:31,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:31,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:31,859 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:32,457 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:39:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:32,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:32,458 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:39:32,458 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:39:32,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:32,458 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:32,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:39:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 155. [2022-02-24 01:39:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-24 01:39:32,594 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 50 [2022-02-24 01:39:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:32,594 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-24 01:39:32,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-24 01:39:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:32,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:32,595 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:32,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2022-02-24 01:39:32,595 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:32,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1811689300, now seen corresponding path program 186 times [2022-02-24 01:39:32,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:32,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803718740] [2022-02-24 01:39:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:32,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:32,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:32,597 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:32,597 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:32,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:32,806 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:32,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803718740] [2022-02-24 01:39:32,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803718740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:32,806 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:32,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:32,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618227443] [2022-02-24 01:39:32,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:32,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:32,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:32,806 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:33,415 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:39:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:33,416 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:33,416 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:39:33,416 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:39:33,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:33,417 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:33,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:39:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 157. [2022-02-24 01:39:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-24 01:39:33,557 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 50 [2022-02-24 01:39:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:33,557 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-24 01:39:33,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-24 01:39:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:33,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:33,558 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:33,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2022-02-24 01:39:33,558 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:33,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash -693209388, now seen corresponding path program 187 times [2022-02-24 01:39:33,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:33,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850143288] [2022-02-24 01:39:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:33,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:33,560 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:33,560 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:33,560 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:33,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:33,760 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:33,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850143288] [2022-02-24 01:39:33,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [850143288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:33,760 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:33,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:33,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917170187] [2022-02-24 01:39:33,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:33,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:33,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:33,761 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:34,369 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:39:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:34,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:34,370 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:39:34,370 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:39:34,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:34,370 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:34,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:39:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 159. [2022-02-24 01:39:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-24 01:39:34,524 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 50 [2022-02-24 01:39:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:34,524 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-24 01:39:34,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-24 01:39:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:34,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:34,525 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:34,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2022-02-24 01:39:34,525 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:34,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:34,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1575804500, now seen corresponding path program 188 times [2022-02-24 01:39:34,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:34,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110655366] [2022-02-24 01:39:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:34,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:34,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:34,527 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:34,527 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:34,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:34,734 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:34,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110655366] [2022-02-24 01:39:34,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110655366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:34,735 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:34,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:34,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671075375] [2022-02-24 01:39:34,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:34,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:34,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:34,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:34,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:34,736 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:35,341 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:39:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:35,342 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:39:35,342 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:39:35,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:35,342 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:35,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:39:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 161. [2022-02-24 01:39:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-24 01:39:35,493 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 50 [2022-02-24 01:39:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:35,493 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-24 01:39:35,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-24 01:39:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:39:35,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:35,494 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:35,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-02-24 01:39:35,494 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:35,494 INFO L85 PathProgramCache]: Analyzing trace with hash 254764500, now seen corresponding path program 189 times [2022-02-24 01:39:35,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:35,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320237017] [2022-02-24 01:39:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:35,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:35,496 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:35,496 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:35,496 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:35,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:35,705 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:35,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320237017] [2022-02-24 01:39:35,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320237017] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:35,705 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:35,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:39:35,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822267687] [2022-02-24 01:39:35,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:35,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:39:35,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:39:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:39:35,706 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:36,289 INFO L93 Difference]: Finished difference Result 204 states and 296 transitions. [2022-02-24 01:39:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:39:36,290 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:39:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:36,290 INFO L225 Difference]: With dead ends: 204 [2022-02-24 01:39:36,290 INFO L226 Difference]: Without dead ends: 198 [2022-02-24 01:39:36,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:39:36,291 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:36,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-24 01:39:36,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 127. [2022-02-24 01:39:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-24 01:39:36,396 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 50 [2022-02-24 01:39:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:36,397 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-24 01:39:36,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-24 01:39:36,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:36,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:36,397 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:36,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-02-24 01:39:36,398 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:36,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1540922167, now seen corresponding path program 190 times [2022-02-24 01:39:36,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:36,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351333180] [2022-02-24 01:39:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:36,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:36,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:36,400 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:36,400 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:36,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:36,621 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:36,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351333180] [2022-02-24 01:39:36,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1351333180] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:36,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:36,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:36,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456554978] [2022-02-24 01:39:36,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:36,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:36,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:36,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:36,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:36,622 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:37,182 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2022-02-24 01:39:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:37,182 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:37,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:37,183 INFO L225 Difference]: With dead ends: 142 [2022-02-24 01:39:37,183 INFO L226 Difference]: Without dead ends: 136 [2022-02-24 01:39:37,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:37,183 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:37,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 21 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-24 01:39:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2022-02-24 01:39:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-24 01:39:37,293 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 52 [2022-02-24 01:39:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:37,294 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-24 01:39:37,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-24 01:39:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:37,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:37,294 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:37,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-02-24 01:39:37,294 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:37,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash 445973175, now seen corresponding path program 191 times [2022-02-24 01:39:37,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:37,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562692375] [2022-02-24 01:39:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:37,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:37,296 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:37,296 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:37,296 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:37,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:37,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:37,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562692375] [2022-02-24 01:39:37,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1562692375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:37,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:37,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:37,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392121868] [2022-02-24 01:39:37,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:37,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:37,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:37,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:37,517 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:38,080 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-24 01:39:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:38,080 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:38,081 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:39:38,081 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:39:38,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:38,081 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:38,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:39:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-02-24 01:39:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-24 01:39:38,198 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 52 [2022-02-24 01:39:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:38,199 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-24 01:39:38,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-24 01:39:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:38,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:38,199 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:38,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2022-02-24 01:39:38,199 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 466979383, now seen corresponding path program 192 times [2022-02-24 01:39:38,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:38,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032816906] [2022-02-24 01:39:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:38,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:38,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:38,201 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:38,201 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:38,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:38,454 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:38,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032816906] [2022-02-24 01:39:38,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032816906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:38,454 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:38,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:38,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458044856] [2022-02-24 01:39:38,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:38,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:38,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:38,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:38,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:38,455 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:39,031 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:39:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:39,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:39,032 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:39:39,032 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:39:39,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:39,033 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:39,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:39:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2022-02-24 01:39:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-24 01:39:39,150 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 52 [2022-02-24 01:39:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:39,150 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-24 01:39:39,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-24 01:39:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:39,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:39,151 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:39,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2022-02-24 01:39:39,151 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:39,151 INFO L85 PathProgramCache]: Analyzing trace with hash -820891209, now seen corresponding path program 193 times [2022-02-24 01:39:39,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:39,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741070534] [2022-02-24 01:39:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:39,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:39,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:39,155 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:39,155 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:39,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:39,375 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:39,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741070534] [2022-02-24 01:39:39,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741070534] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:39,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:39,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:39,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245694752] [2022-02-24 01:39:39,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:39,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:39,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:39,376 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:39,954 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:39:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:39,955 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:39:39,955 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:39:39,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:39,955 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:39,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 17 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:39:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2022-02-24 01:39:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-24 01:39:40,075 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 52 [2022-02-24 01:39:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:40,076 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-24 01:39:40,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:40,076 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-24 01:39:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:40,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:40,076 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:40,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2022-02-24 01:39:40,076 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1513948873, now seen corresponding path program 194 times [2022-02-24 01:39:40,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:40,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596698278] [2022-02-24 01:39:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:40,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:40,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:40,078 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:40,078 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:40,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:40,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:40,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596698278] [2022-02-24 01:39:40,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [596698278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:40,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:40,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:40,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884659779] [2022-02-24 01:39:40,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:40,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:40,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:40,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:40,302 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:40,887 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:39:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:40,887 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:40,887 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:39:40,887 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:39:40,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:40,888 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:40,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:39:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 141. [2022-02-24 01:39:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-24 01:39:41,011 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 52 [2022-02-24 01:39:41,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:41,011 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-24 01:39:41,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-24 01:39:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:41,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:41,012 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:41,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2022-02-24 01:39:41,012 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1822433097, now seen corresponding path program 195 times [2022-02-24 01:39:41,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:41,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011781817] [2022-02-24 01:39:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:41,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:41,014 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:41,014 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:41,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:41,236 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:41,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011781817] [2022-02-24 01:39:41,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011781817] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:41,236 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:41,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:41,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970431245] [2022-02-24 01:39:41,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:41,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:41,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:41,237 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:41,833 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:39:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:41,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:41,833 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:39:41,833 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:39:41,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:41,834 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:41,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:39:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 143. [2022-02-24 01:39:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-24 01:39:41,963 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 52 [2022-02-24 01:39:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:41,964 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-24 01:39:41,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-24 01:39:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:41,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:41,964 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:41,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2022-02-24 01:39:41,964 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1923028937, now seen corresponding path program 196 times [2022-02-24 01:39:41,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:41,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829898760] [2022-02-24 01:39:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:41,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:41,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:41,966 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:41,966 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:42,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:42,202 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:42,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829898760] [2022-02-24 01:39:42,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829898760] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:42,202 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:42,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:42,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871750197] [2022-02-24 01:39:42,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:42,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:42,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:42,203 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:42,809 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:39:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:42,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:42,810 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:39:42,810 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:39:42,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:42,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:42,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:39:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 145. [2022-02-24 01:39:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-24 01:39:42,945 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 52 [2022-02-24 01:39:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:42,945 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-24 01:39:42,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-24 01:39:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:42,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:42,945 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:42,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-02-24 01:39:42,945 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:42,946 INFO L85 PathProgramCache]: Analyzing trace with hash 188616631, now seen corresponding path program 197 times [2022-02-24 01:39:42,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:42,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210489566] [2022-02-24 01:39:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:42,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:42,947 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:42,947 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:43,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:43,171 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:43,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210489566] [2022-02-24 01:39:43,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210489566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:43,171 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:43,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:43,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425077910] [2022-02-24 01:39:43,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:43,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:43,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:43,172 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:43,788 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:39:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:43,788 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:43,789 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:39:43,789 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:39:43,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:43,789 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:43,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:39:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2022-02-24 01:39:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-24 01:39:43,927 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 52 [2022-02-24 01:39:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:43,927 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-24 01:39:43,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-24 01:39:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:43,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:43,927 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:43,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-02-24 01:39:43,927 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2039523529, now seen corresponding path program 198 times [2022-02-24 01:39:43,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:43,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877650931] [2022-02-24 01:39:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:43,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:43,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:43,930 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:43,930 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:44,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:44,153 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:44,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877650931] [2022-02-24 01:39:44,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877650931] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:44,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:44,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:44,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879504326] [2022-02-24 01:39:44,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:44,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:44,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:44,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:44,154 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:44,782 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:39:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:44,782 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:44,783 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:39:44,783 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:39:44,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:44,783 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:44,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:39:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2022-02-24 01:39:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-24 01:39:44,922 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 52 [2022-02-24 01:39:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:44,922 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-24 01:39:44,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-24 01:39:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:44,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:44,922 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:44,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-02-24 01:39:44,923 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:44,923 INFO L85 PathProgramCache]: Analyzing trace with hash -93536585, now seen corresponding path program 199 times [2022-02-24 01:39:44,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:44,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899563741] [2022-02-24 01:39:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:44,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:44,925 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:44,925 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:45,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:45,149 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:45,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899563741] [2022-02-24 01:39:45,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1899563741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:45,149 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:45,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:45,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982505787] [2022-02-24 01:39:45,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:45,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:45,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:45,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:45,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:45,150 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:45,786 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:39:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:45,786 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:45,787 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:39:45,787 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:39:45,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:45,787 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:45,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:39:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 151. [2022-02-24 01:39:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-24 01:39:45,933 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 52 [2022-02-24 01:39:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:45,934 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-24 01:39:45,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-24 01:39:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:45,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:45,934 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:45,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2022-02-24 01:39:45,934 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:45,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1689142839, now seen corresponding path program 200 times [2022-02-24 01:39:45,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:45,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217763276] [2022-02-24 01:39:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:45,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:45,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:45,936 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:45,936 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:46,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:46,161 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:46,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217763276] [2022-02-24 01:39:46,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1217763276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:46,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:46,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:46,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963367872] [2022-02-24 01:39:46,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:46,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:46,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:46,163 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:46,803 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:39:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:46,804 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:39:46,804 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:39:46,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:46,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:46,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 15 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:39:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 153. [2022-02-24 01:39:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-24 01:39:47,021 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 52 [2022-02-24 01:39:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:47,021 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-24 01:39:47,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-24 01:39:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:47,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:47,021 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:47,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2022-02-24 01:39:47,021 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:47,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1152118199, now seen corresponding path program 201 times [2022-02-24 01:39:47,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:47,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403592482] [2022-02-24 01:39:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:47,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:47,023 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:47,023 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:47,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:47,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:47,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403592482] [2022-02-24 01:39:47,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403592482] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:47,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:47,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:47,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030091334] [2022-02-24 01:39:47,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:47,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:47,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:47,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:47,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:47,247 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:47,902 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:39:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:47,903 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:39:47,903 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:39:47,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:47,904 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:47,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:39:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2022-02-24 01:39:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-24 01:39:48,057 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 52 [2022-02-24 01:39:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:48,057 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-24 01:39:48,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-24 01:39:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:48,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:48,058 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:48,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2022-02-24 01:39:48,058 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:48,058 INFO L85 PathProgramCache]: Analyzing trace with hash 467514679, now seen corresponding path program 202 times [2022-02-24 01:39:48,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:48,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594438214] [2022-02-24 01:39:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:48,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:48,060 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:48,060 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:48,060 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:48,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:48,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:48,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594438214] [2022-02-24 01:39:48,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1594438214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:48,281 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:48,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:48,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640904363] [2022-02-24 01:39:48,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:48,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:48,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:48,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:48,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:48,281 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:48,942 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:39:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:48,943 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:39:48,943 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:39:48,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:48,944 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:48,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:39:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 157. [2022-02-24 01:39:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-24 01:39:49,099 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 52 [2022-02-24 01:39:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:49,099 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-24 01:39:49,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-24 01:39:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:49,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:49,099 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:49,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2022-02-24 01:39:49,100 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash -306471753, now seen corresponding path program 203 times [2022-02-24 01:39:49,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:49,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980656157] [2022-02-24 01:39:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:49,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:49,101 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:49,101 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:49,101 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:49,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:49,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:49,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980656157] [2022-02-24 01:39:49,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1980656157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:49,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:49,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:49,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096517878] [2022-02-24 01:39:49,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:49,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:49,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:49,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:49,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:49,330 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:50,006 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:39:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:50,006 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:50,007 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:39:50,007 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:39:50,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:50,007 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:50,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 25 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:39:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 159. [2022-02-24 01:39:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-24 01:39:50,166 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 52 [2022-02-24 01:39:50,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:50,166 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-24 01:39:50,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-24 01:39:50,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:50,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:50,167 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:50,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2022-02-24 01:39:50,167 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:50,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1078090697, now seen corresponding path program 204 times [2022-02-24 01:39:50,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:50,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27962986] [2022-02-24 01:39:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:50,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:50,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:50,169 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:50,169 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:50,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:50,391 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:50,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27962986] [2022-02-24 01:39:50,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [27962986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:50,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:50,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:50,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183693685] [2022-02-24 01:39:50,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:50,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:50,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:50,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:50,393 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:51,077 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:39:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:51,078 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:39:51,078 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:39:51,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:51,078 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:51,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:39:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 161. [2022-02-24 01:39:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-24 01:39:51,240 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 52 [2022-02-24 01:39:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:51,240 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-24 01:39:51,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-24 01:39:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:51,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:51,240 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:51,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-02-24 01:39:51,241 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash 425446327, now seen corresponding path program 205 times [2022-02-24 01:39:51,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:51,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561407123] [2022-02-24 01:39:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:51,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:51,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:51,242 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:51,242 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:51,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:51,463 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:51,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561407123] [2022-02-24 01:39:51,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [561407123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:51,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:51,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:51,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388261395] [2022-02-24 01:39:51,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:51,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:51,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:51,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:51,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:51,464 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:52,159 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:39:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:52,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:52,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:52,160 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:39:52,160 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:39:52,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:52,160 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:52,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:39:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 163. [2022-02-24 01:39:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-24 01:39:52,324 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 52 [2022-02-24 01:39:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:52,324 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-24 01:39:52,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-24 01:39:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:52,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:52,325 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:52,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-02-24 01:39:52,325 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2079452361, now seen corresponding path program 206 times [2022-02-24 01:39:52,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:52,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092071613] [2022-02-24 01:39:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:52,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:52,327 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:52,327 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:52,327 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:52,551 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:52,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092071613] [2022-02-24 01:39:52,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092071613] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:52,551 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:52,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:52,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901536176] [2022-02-24 01:39:52,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:52,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:52,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:52,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:52,552 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:53,248 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:39:53,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:53,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:53,249 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:39:53,249 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:39:53,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:53,250 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:53,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:39:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 165. [2022-02-24 01:39:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-24 01:39:53,415 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 52 [2022-02-24 01:39:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:53,415 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-24 01:39:53,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:53,415 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-24 01:39:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:53,415 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:53,415 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:53,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-02-24 01:39:53,415 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash 189561527, now seen corresponding path program 207 times [2022-02-24 01:39:53,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:53,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773945409] [2022-02-24 01:39:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:53,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:53,417 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:53,417 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:53,417 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:53,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:53,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:53,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773945409] [2022-02-24 01:39:53,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773945409] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:53,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:53,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:53,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025770380] [2022-02-24 01:39:53,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:53,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:53,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:53,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:53,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:53,646 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:54,346 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:39:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:54,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:54,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:54,347 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:39:54,347 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:39:54,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:54,347 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:54,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:39:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 167. [2022-02-24 01:39:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-24 01:39:54,515 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 52 [2022-02-24 01:39:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:54,516 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-24 01:39:54,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-24 01:39:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:54,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:54,516 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:54,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2022-02-24 01:39:54,516 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:54,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1131478473, now seen corresponding path program 208 times [2022-02-24 01:39:54,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:54,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814851328] [2022-02-24 01:39:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:54,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:54,518 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:54,518 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:54,518 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:54,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:54,737 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:54,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814851328] [2022-02-24 01:39:54,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [814851328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:54,737 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:54,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:54,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601874192] [2022-02-24 01:39:54,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:54,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:54,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:54,738 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:55,433 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:39:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:55,434 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:39:55,434 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:39:55,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:55,434 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:55,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:39:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 169. [2022-02-24 01:39:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-24 01:39:55,600 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 52 [2022-02-24 01:39:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:55,601 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-24 01:39:55,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-24 01:39:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:39:55,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:55,601 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:55,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2022-02-24 01:39:55,601 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash 659401143, now seen corresponding path program 209 times [2022-02-24 01:39:55,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:55,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350781860] [2022-02-24 01:39:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:55,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:55,603 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:55,603 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:55,603 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:55,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:55,824 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:55,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350781860] [2022-02-24 01:39:55,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [350781860] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:55,824 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:55,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:39:55,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152112565] [2022-02-24 01:39:55,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:55,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:39:55,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:55,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:39:55,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:39:55,825 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:56,467 INFO L93 Difference]: Finished difference Result 214 states and 311 transitions. [2022-02-24 01:39:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:39:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:39:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:56,468 INFO L225 Difference]: With dead ends: 214 [2022-02-24 01:39:56,468 INFO L226 Difference]: Without dead ends: 208 [2022-02-24 01:39:56,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:39:56,469 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:56,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-24 01:39:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 133. [2022-02-24 01:39:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-24 01:39:56,585 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 52 [2022-02-24 01:39:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:56,585 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-24 01:39:56,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-24 01:39:56,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:39:56,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:56,585 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:56,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2022-02-24 01:39:56,586 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:56,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:56,586 INFO L85 PathProgramCache]: Analyzing trace with hash 801286874, now seen corresponding path program 210 times [2022-02-24 01:39:56,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:56,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409504524] [2022-02-24 01:39:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:56,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:56,587 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:56,587 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:56,587 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:56,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:56,822 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:56,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409504524] [2022-02-24 01:39:56,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409504524] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:56,822 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:56,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:39:56,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514599314] [2022-02-24 01:39:56,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:56,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:39:56,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:56,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:39:56,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:39:56,823 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:57,433 INFO L93 Difference]: Finished difference Result 148 states and 213 transitions. [2022-02-24 01:39:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:39:57,433 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:39:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:57,434 INFO L225 Difference]: With dead ends: 148 [2022-02-24 01:39:57,434 INFO L226 Difference]: Without dead ends: 142 [2022-02-24 01:39:57,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:39:57,434 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:57,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 23 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:57,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-24 01:39:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 137. [2022-02-24 01:39:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-24 01:39:57,553 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 54 [2022-02-24 01:39:57,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:57,553 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-24 01:39:57,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-24 01:39:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:39:57,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:57,553 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:57,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2022-02-24 01:39:57,554 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash -293662118, now seen corresponding path program 211 times [2022-02-24 01:39:57,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:57,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047584420] [2022-02-24 01:39:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:57,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:57,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:57,556 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:57,556 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:57,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:57,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:57,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047584420] [2022-02-24 01:39:57,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2047584420] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:57,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:57,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:39:57,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111399540] [2022-02-24 01:39:57,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:57,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:39:57,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:57,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:39:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:39:57,793 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:58,401 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-24 01:39:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:39:58,401 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:39:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:58,401 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:39:58,401 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:39:58,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:39:58,402 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:58,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 19 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:39:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2022-02-24 01:39:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-24 01:39:58,531 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 54 [2022-02-24 01:39:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:58,531 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-24 01:39:58,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-24 01:39:58,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:39:58,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:58,531 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:58,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2022-02-24 01:39:58,531 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash -272655910, now seen corresponding path program 212 times [2022-02-24 01:39:58,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:58,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694809603] [2022-02-24 01:39:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:58,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:58,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:58,533 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:58,533 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:58,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:58,770 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:58,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694809603] [2022-02-24 01:39:58,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694809603] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:58,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:58,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:39:58,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008306460] [2022-02-24 01:39:58,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:58,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:39:58,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:39:58,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:39:58,771 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:39:59,377 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:39:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:39:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:39:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:39:59,378 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:39:59,378 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:39:59,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:39:59,378 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:39:59,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:39:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:39:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2022-02-24 01:39:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-24 01:39:59,510 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 54 [2022-02-24 01:39:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:39:59,510 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-24 01:39:59,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:39:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-24 01:39:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:39:59,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:39:59,511 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:39:59,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2022-02-24 01:39:59,511 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:39:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:39:59,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1560526502, now seen corresponding path program 213 times [2022-02-24 01:39:59,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:39:59,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566256711] [2022-02-24 01:39:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:39:59,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:39:59,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:39:59,513 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:39:59,513 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:39:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:59,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:39:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:39:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:39:59,765 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:39:59,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566256711] [2022-02-24 01:39:59,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [566256711] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:39:59,765 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:39:59,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:39:59,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417102436] [2022-02-24 01:39:59,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:39:59,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:39:59,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:39:59,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:39:59,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:39:59,766 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:00,389 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:40:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:00,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:00,389 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:40:00,389 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:40:00,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:00,390 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:00,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:40:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2022-02-24 01:40:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-24 01:40:00,528 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 54 [2022-02-24 01:40:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:00,528 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-24 01:40:00,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-24 01:40:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:00,528 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:00,528 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:00,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2022-02-24 01:40:00,528 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:00,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2041383130, now seen corresponding path program 214 times [2022-02-24 01:40:00,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:00,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666653804] [2022-02-24 01:40:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:00,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:00,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:00,530 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:00,530 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:00,765 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:00,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666653804] [2022-02-24 01:40:00,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [666653804] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:00,765 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:00,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:00,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474797593] [2022-02-24 01:40:00,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:00,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:00,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:00,765 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:01,380 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:40:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:01,381 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:40:01,381 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:40:01,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:01,382 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:01,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:40:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2022-02-24 01:40:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-24 01:40:01,522 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 54 [2022-02-24 01:40:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:01,522 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-24 01:40:01,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-24 01:40:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:01,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:01,523 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:01,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2022-02-24 01:40:01,523 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898906, now seen corresponding path program 215 times [2022-02-24 01:40:01,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:01,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595526832] [2022-02-24 01:40:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:01,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:01,524 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:01,524 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:01,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:01,759 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:01,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595526832] [2022-02-24 01:40:01,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [595526832] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:01,759 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:01,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:01,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381475086] [2022-02-24 01:40:01,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:01,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:01,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:01,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:01,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:01,760 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:02,373 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:40:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:02,373 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:02,373 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:40:02,374 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:40:02,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:02,374 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:02,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:40:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 149. [2022-02-24 01:40:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-24 01:40:02,515 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 54 [2022-02-24 01:40:02,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:02,516 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-24 01:40:02,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-24 01:40:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:02,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:02,516 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:02,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2022-02-24 01:40:02,516 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1632303066, now seen corresponding path program 216 times [2022-02-24 01:40:02,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:02,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051826314] [2022-02-24 01:40:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:02,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:02,518 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:02,518 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:02,518 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:02,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:02,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:02,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051826314] [2022-02-24 01:40:02,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1051826314] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:02,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:02,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:02,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062309496] [2022-02-24 01:40:02,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:02,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:02,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:02,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:02,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:02,752 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:03,381 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:40:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:03,382 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:40:03,382 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:40:03,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:03,383 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:03,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:40:03,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2022-02-24 01:40:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-24 01:40:03,528 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 54 [2022-02-24 01:40:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:03,529 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-24 01:40:03,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-24 01:40:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:03,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:03,529 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:03,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2022-02-24 01:40:03,529 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:03,529 INFO L85 PathProgramCache]: Analyzing trace with hash -551018662, now seen corresponding path program 217 times [2022-02-24 01:40:03,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:03,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538115906] [2022-02-24 01:40:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:03,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:03,531 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:03,531 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:03,531 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:03,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:03,770 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:03,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538115906] [2022-02-24 01:40:03,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1538115906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:03,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:03,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:03,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501914612] [2022-02-24 01:40:03,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:03,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:03,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:03,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:03,771 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:04,443 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:40:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:04,443 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:04,444 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:40:04,444 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:40:04,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:04,444 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:04,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:40:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2022-02-24 01:40:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-24 01:40:04,598 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 54 [2022-02-24 01:40:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:04,598 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-24 01:40:04,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-24 01:40:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:04,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:04,599 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:04,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2022-02-24 01:40:04,599 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1515808474, now seen corresponding path program 218 times [2022-02-24 01:40:04,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:04,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160439836] [2022-02-24 01:40:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:04,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:04,600 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:04,600 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:04,601 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:04,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:04,835 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:04,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160439836] [2022-02-24 01:40:04,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160439836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:04,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:04,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:04,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812283024] [2022-02-24 01:40:04,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:04,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:04,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:04,836 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:05,482 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:40:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:05,483 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:40:05,483 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:40:05,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:05,484 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:05,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:40:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2022-02-24 01:40:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-24 01:40:05,706 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 54 [2022-02-24 01:40:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:05,706 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-24 01:40:05,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-24 01:40:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:05,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:05,706 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:05,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2022-02-24 01:40:05,707 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:05,707 INFO L85 PathProgramCache]: Analyzing trace with hash -833171878, now seen corresponding path program 219 times [2022-02-24 01:40:05,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:05,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348666583] [2022-02-24 01:40:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:05,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:05,708 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:05,708 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:05,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:05,944 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:05,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348666583] [2022-02-24 01:40:05,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [348666583] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:05,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:05,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:05,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766484436] [2022-02-24 01:40:05,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:05,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:05,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:05,944 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:06,602 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:40:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:06,602 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:06,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:06,603 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:40:06,603 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:40:06,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:06,603 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:06,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:40:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 157. [2022-02-24 01:40:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-24 01:40:06,836 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 54 [2022-02-24 01:40:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:06,836 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-24 01:40:06,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-24 01:40:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:06,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:06,837 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:06,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2022-02-24 01:40:06,837 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:06,838 INFO L85 PathProgramCache]: Analyzing trace with hash 949507546, now seen corresponding path program 220 times [2022-02-24 01:40:06,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:06,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483070141] [2022-02-24 01:40:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:06,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:06,839 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:06,839 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:06,839 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:07,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:07,123 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:07,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483070141] [2022-02-24 01:40:07,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1483070141] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:07,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:07,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:07,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429030362] [2022-02-24 01:40:07,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:07,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:07,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:07,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:07,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:07,124 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:07,833 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:40:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:07,834 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:40:07,834 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:40:07,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:07,834 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:07,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:40:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2022-02-24 01:40:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-24 01:40:07,994 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 54 [2022-02-24 01:40:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:07,995 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-24 01:40:07,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-24 01:40:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:07,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:07,995 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:07,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2022-02-24 01:40:07,995 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:07,995 INFO L85 PathProgramCache]: Analyzing trace with hash 412482906, now seen corresponding path program 221 times [2022-02-24 01:40:07,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:07,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917107813] [2022-02-24 01:40:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:07,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:07,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:07,997 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:07,997 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:08,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:08,233 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:08,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917107813] [2022-02-24 01:40:08,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917107813] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:08,233 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:08,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:08,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067745731] [2022-02-24 01:40:08,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:08,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:08,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:08,233 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:08,912 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:40:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:08,912 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:40:08,912 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:40:08,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:08,913 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:08,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:40:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 161. [2022-02-24 01:40:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-24 01:40:09,078 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 54 [2022-02-24 01:40:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:09,078 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-24 01:40:09,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-24 01:40:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:09,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:09,079 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:09,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2022-02-24 01:40:09,079 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash -272120614, now seen corresponding path program 222 times [2022-02-24 01:40:09,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:09,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919838846] [2022-02-24 01:40:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:09,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:09,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:09,081 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:09,081 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:09,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:09,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:09,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919838846] [2022-02-24 01:40:09,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1919838846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:09,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:09,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:09,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962312255] [2022-02-24 01:40:09,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:09,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:09,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:09,323 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:10,021 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:40:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:10,021 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:10,022 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:40:10,022 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:40:10,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:10,022 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:10,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:40:10,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 163. [2022-02-24 01:40:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-24 01:40:10,190 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 54 [2022-02-24 01:40:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:10,190 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-24 01:40:10,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-24 01:40:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:10,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:10,191 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:10,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2022-02-24 01:40:10,191 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1046107046, now seen corresponding path program 223 times [2022-02-24 01:40:10,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:10,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720267319] [2022-02-24 01:40:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:10,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:10,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:10,193 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:10,193 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:10,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:10,423 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:10,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720267319] [2022-02-24 01:40:10,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [720267319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:10,424 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:10,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:10,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351613465] [2022-02-24 01:40:10,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:10,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:10,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:10,424 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:11,123 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:40:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:11,124 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:11,124 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:40:11,124 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:40:11,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:11,125 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:11,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:40:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 165. [2022-02-24 01:40:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-24 01:40:11,297 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 54 [2022-02-24 01:40:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:11,297 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-24 01:40:11,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-24 01:40:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:11,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:11,297 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:11,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2022-02-24 01:40:11,297 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:11,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1817725990, now seen corresponding path program 224 times [2022-02-24 01:40:11,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:11,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597642345] [2022-02-24 01:40:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:11,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:11,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:11,299 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:11,299 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:11,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:11,532 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:11,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597642345] [2022-02-24 01:40:11,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [597642345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:11,532 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:11,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:11,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039929583] [2022-02-24 01:40:11,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:11,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:11,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:11,532 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:12,245 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:40:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:12,245 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:12,245 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:40:12,245 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:40:12,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:12,246 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:12,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:40:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 167. [2022-02-24 01:40:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-24 01:40:12,420 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 54 [2022-02-24 01:40:12,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:12,420 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-24 01:40:12,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-24 01:40:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:12,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:12,421 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:12,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2022-02-24 01:40:12,421 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash -314188966, now seen corresponding path program 225 times [2022-02-24 01:40:12,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:12,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877665688] [2022-02-24 01:40:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:12,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:12,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:12,423 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:12,423 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:12,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:12,680 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:12,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877665688] [2022-02-24 01:40:12,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [877665688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:12,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:12,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:12,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398078479] [2022-02-24 01:40:12,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:12,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:12,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:12,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:12,681 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:13,440 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:40:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:13,440 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:13,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:13,440 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:40:13,440 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:40:13,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:13,441 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:13,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:13,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:40:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 169. [2022-02-24 01:40:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-24 01:40:13,620 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 54 [2022-02-24 01:40:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:13,620 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-24 01:40:13,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-24 01:40:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:13,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:13,621 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:13,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2022-02-24 01:40:13,621 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:13,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:13,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1475879642, now seen corresponding path program 226 times [2022-02-24 01:40:13,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:13,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781568558] [2022-02-24 01:40:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:13,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:13,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:13,623 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:13,623 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:13,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:13,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781568558] [2022-02-24 01:40:13,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781568558] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:13,864 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:13,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:13,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926259232] [2022-02-24 01:40:13,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:13,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:13,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:13,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:13,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:13,864 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:14,585 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:40:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:14,586 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:40:14,586 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:40:14,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:14,586 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:14,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:40:14,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2022-02-24 01:40:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-24 01:40:14,767 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 54 [2022-02-24 01:40:14,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:14,767 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-24 01:40:14,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:14,767 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-24 01:40:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:14,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:14,767 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:14,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2022-02-24 01:40:14,768 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -550073766, now seen corresponding path program 227 times [2022-02-24 01:40:14,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:14,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996943069] [2022-02-24 01:40:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:14,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:14,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:14,769 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:14,769 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:15,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:15,003 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:15,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996943069] [2022-02-24 01:40:15,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [996943069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:15,003 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:15,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:15,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974265904] [2022-02-24 01:40:15,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:15,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:15,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:15,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:15,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:15,004 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:15,739 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:40:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:15,740 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:40:15,740 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:40:15,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:15,741 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:15,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:15,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:40:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2022-02-24 01:40:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-24 01:40:15,923 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 54 [2022-02-24 01:40:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:15,923 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-24 01:40:15,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-24 01:40:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:15,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:15,923 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:15,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2022-02-24 01:40:15,924 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1871113766, now seen corresponding path program 228 times [2022-02-24 01:40:15,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:15,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486075739] [2022-02-24 01:40:15,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:15,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:15,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:15,925 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:15,925 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:16,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:16,157 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:16,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486075739] [2022-02-24 01:40:16,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [486075739] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:16,157 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:16,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:16,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430302671] [2022-02-24 01:40:16,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:16,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:16,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:16,158 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:16,904 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:40:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:16,904 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:16,905 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:40:16,905 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:40:16,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:16,906 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:16,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:40:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 175. [2022-02-24 01:40:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-24 01:40:17,100 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 54 [2022-02-24 01:40:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:17,100 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-24 01:40:17,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-24 01:40:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:17,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:17,100 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:17,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2022-02-24 01:40:17,100 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash -80234150, now seen corresponding path program 229 times [2022-02-24 01:40:17,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:17,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250104369] [2022-02-24 01:40:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:17,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:17,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:17,102 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:17,103 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:17,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:17,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:17,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250104369] [2022-02-24 01:40:17,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250104369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:17,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:17,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:17,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235105489] [2022-02-24 01:40:17,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:17,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:17,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:17,340 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:18,111 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:40:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:18,111 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:18,111 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:40:18,111 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:40:18,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:18,112 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:18,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:40:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 177. [2022-02-24 01:40:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-24 01:40:18,379 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 54 [2022-02-24 01:40:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:18,379 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-24 01:40:18,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-24 01:40:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:40:18,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:18,380 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:18,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2022-02-24 01:40:18,380 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:18,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1326808870, now seen corresponding path program 230 times [2022-02-24 01:40:18,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:18,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886902419] [2022-02-24 01:40:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:18,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:18,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:18,382 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:18,382 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:18,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:18,619 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:18,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886902419] [2022-02-24 01:40:18,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [886902419] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:18,619 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:18,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:40:18,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795524643] [2022-02-24 01:40:18,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:18,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:40:18,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:18,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:40:18,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:40:18,620 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:19,339 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:40:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:40:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:40:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:19,340 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:40:19,340 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:40:19,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:40:19,340 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:19,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:19,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:40:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 139. [2022-02-24 01:40:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-24 01:40:19,479 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 54 [2022-02-24 01:40:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:19,479 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-24 01:40:19,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-24 01:40:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:19,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:19,479 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:19,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2022-02-24 01:40:19,479 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1318625859, now seen corresponding path program 231 times [2022-02-24 01:40:19,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:19,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134918426] [2022-02-24 01:40:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:19,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:19,481 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:19,481 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:19,481 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:19,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:19,735 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:19,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134918426] [2022-02-24 01:40:19,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [134918426] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:19,735 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:19,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:19,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132698112] [2022-02-24 01:40:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:19,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:19,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:19,736 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:20,393 INFO L93 Difference]: Finished difference Result 154 states and 222 transitions. [2022-02-24 01:40:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:20,394 INFO L225 Difference]: With dead ends: 154 [2022-02-24 01:40:20,394 INFO L226 Difference]: Without dead ends: 148 [2022-02-24 01:40:20,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:20,394 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:20,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 25 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-24 01:40:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2022-02-24 01:40:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-24 01:40:20,537 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 56 [2022-02-24 01:40:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:20,537 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-24 01:40:20,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-24 01:40:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:20,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:20,537 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:20,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2022-02-24 01:40:20,537 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:20,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1881392445, now seen corresponding path program 232 times [2022-02-24 01:40:20,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:20,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901252318] [2022-02-24 01:40:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:20,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:20,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:20,539 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:20,539 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:20,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:20,794 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:20,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901252318] [2022-02-24 01:40:20,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901252318] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:20,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:20,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:20,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527301109] [2022-02-24 01:40:20,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:20,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:20,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:20,795 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:21,461 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-24 01:40:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:21,461 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:21,461 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:40:21,461 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:40:21,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:21,462 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:21,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:40:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2022-02-24 01:40:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-24 01:40:21,614 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 56 [2022-02-24 01:40:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:21,614 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-24 01:40:21,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-24 01:40:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:21,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:21,614 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:21,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2022-02-24 01:40:21,614 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1902398653, now seen corresponding path program 233 times [2022-02-24 01:40:21,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:21,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456789261] [2022-02-24 01:40:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:21,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:21,616 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:21,616 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:21,617 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:21,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:21,878 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:21,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456789261] [2022-02-24 01:40:21,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [456789261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:21,878 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:21,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:21,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398766329] [2022-02-24 01:40:21,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:21,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:21,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:21,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:21,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:21,878 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:22,544 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:40:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:22,545 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:22,545 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:40:22,545 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:40:22,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:22,546 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:22,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:40:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2022-02-24 01:40:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-24 01:40:22,772 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 56 [2022-02-24 01:40:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:22,772 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-24 01:40:22,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-24 01:40:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:22,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:22,773 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:22,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2022-02-24 01:40:22,773 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:22,773 INFO L85 PathProgramCache]: Analyzing trace with hash 614528061, now seen corresponding path program 234 times [2022-02-24 01:40:22,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:22,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824743089] [2022-02-24 01:40:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:22,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:22,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:22,775 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:22,775 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:23,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:23,040 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:23,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824743089] [2022-02-24 01:40:23,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824743089] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:23,040 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:23,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:23,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720817221] [2022-02-24 01:40:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:23,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:23,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:23,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:23,041 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:23,723 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:40:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:23,723 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:23,724 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:40:23,724 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:40:23,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:23,724 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:23,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:40:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2022-02-24 01:40:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-24 01:40:23,885 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 56 [2022-02-24 01:40:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:23,885 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-24 01:40:23,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-24 01:40:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:23,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:23,885 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:23,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2022-02-24 01:40:23,885 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -78529603, now seen corresponding path program 235 times [2022-02-24 01:40:23,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:23,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168939532] [2022-02-24 01:40:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:23,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:23,887 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:23,887 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:24,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:24,142 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:24,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168939532] [2022-02-24 01:40:24,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [168939532] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:24,142 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:24,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:24,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182300703] [2022-02-24 01:40:24,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:24,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:24,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:24,143 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:24,836 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:40:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:24,836 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:24,837 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:40:24,837 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:40:24,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:24,838 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:24,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:40:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2022-02-24 01:40:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-24 01:40:25,074 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 56 [2022-02-24 01:40:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:25,075 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-24 01:40:25,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-24 01:40:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:25,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:25,075 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:25,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2022-02-24 01:40:25,075 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash -387013827, now seen corresponding path program 236 times [2022-02-24 01:40:25,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:25,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772318663] [2022-02-24 01:40:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:25,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:25,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:25,078 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:25,078 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:25,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:25,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:25,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772318663] [2022-02-24 01:40:25,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772318663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:25,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:25,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:25,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476033590] [2022-02-24 01:40:25,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:25,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:25,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:25,338 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:26,044 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:40:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:26,045 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:26,045 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:40:26,045 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:40:26,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:26,046 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:26,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:40:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 155. [2022-02-24 01:40:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-24 01:40:26,213 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 56 [2022-02-24 01:40:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-24 01:40:26,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-24 01:40:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:26,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:26,214 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:26,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2022-02-24 01:40:26,214 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash -487609667, now seen corresponding path program 237 times [2022-02-24 01:40:26,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:26,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644857972] [2022-02-24 01:40:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:26,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:26,215 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:26,215 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:26,215 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:26,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:26,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:26,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644857972] [2022-02-24 01:40:26,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [644857972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:26,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:26,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:26,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616705977] [2022-02-24 01:40:26,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:26,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:26,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:26,469 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:27,186 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:40:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:27,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:27,191 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:40:27,191 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:40:27,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:27,191 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:27,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:40:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 157. [2022-02-24 01:40:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-24 01:40:27,363 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 56 [2022-02-24 01:40:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:27,363 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-24 01:40:27,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-24 01:40:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:27,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:27,364 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:27,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2022-02-24 01:40:27,364 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035901, now seen corresponding path program 238 times [2022-02-24 01:40:27,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:27,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201623999] [2022-02-24 01:40:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:27,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:27,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:27,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:27,366 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:27,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:27,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:27,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201623999] [2022-02-24 01:40:27,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201623999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:27,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:27,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:27,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010614791] [2022-02-24 01:40:27,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:27,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:27,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:27,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:27,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:27,639 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:28,368 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:40:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:28,368 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:40:28,368 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:40:28,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:28,369 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:28,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:40:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 159. [2022-02-24 01:40:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-24 01:40:28,545 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 56 [2022-02-24 01:40:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:28,545 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-24 01:40:28,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:28,545 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-24 01:40:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:28,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:28,546 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:28,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2022-02-24 01:40:28,546 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:28,546 INFO L85 PathProgramCache]: Analyzing trace with hash -604104259, now seen corresponding path program 239 times [2022-02-24 01:40:28,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:28,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710285971] [2022-02-24 01:40:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:28,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:28,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:28,547 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:28,548 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:28,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:28,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:28,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710285971] [2022-02-24 01:40:28,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [710285971] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:28,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:28,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:28,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328702270] [2022-02-24 01:40:28,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:28,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:28,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:28,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:28,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:28,818 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:29,551 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:40:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:29,552 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:40:29,552 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:40:29,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:29,552 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:29,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:40:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 161. [2022-02-24 01:40:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-24 01:40:29,735 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 56 [2022-02-24 01:40:29,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:29,735 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-24 01:40:29,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:29,735 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-24 01:40:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:29,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:29,736 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:29,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2022-02-24 01:40:29,736 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:29,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1341882685, now seen corresponding path program 240 times [2022-02-24 01:40:29,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:29,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083693062] [2022-02-24 01:40:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:29,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:29,737 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:29,737 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:29,738 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:29,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:29,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:29,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083693062] [2022-02-24 01:40:29,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2083693062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:29,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:29,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:29,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934606203] [2022-02-24 01:40:29,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:29,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:29,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:29,995 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:30,751 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:40:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:30,751 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:30,752 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:40:30,752 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:40:30,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:30,752 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:30,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:40:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 163. [2022-02-24 01:40:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-24 01:40:30,938 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 56 [2022-02-24 01:40:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:30,939 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-24 01:40:30,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-24 01:40:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:30,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:30,939 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:30,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2022-02-24 01:40:30,939 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:30,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:30,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1170405187, now seen corresponding path program 241 times [2022-02-24 01:40:30,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:30,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048902268] [2022-02-24 01:40:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:30,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:30,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:30,941 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:30,941 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:31,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:31,197 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:31,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048902268] [2022-02-24 01:40:31,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2048902268] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:31,197 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:31,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:31,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472925359] [2022-02-24 01:40:31,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:31,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:31,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:31,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:31,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:31,198 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:31,962 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:40:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:31,962 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:31,963 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:40:31,963 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:40:31,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:31,963 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:31,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:40:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2022-02-24 01:40:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-24 01:40:32,154 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 56 [2022-02-24 01:40:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:32,154 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-24 01:40:32,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-24 01:40:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:32,155 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:32,155 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:32,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2022-02-24 01:40:32,155 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1707429827, now seen corresponding path program 242 times [2022-02-24 01:40:32,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:32,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225484261] [2022-02-24 01:40:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:32,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:32,156 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:32,156 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:32,156 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:32,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:32,412 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:32,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225484261] [2022-02-24 01:40:32,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [225484261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:32,412 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:32,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:32,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759116303] [2022-02-24 01:40:32,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:32,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:32,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:32,413 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:33,185 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:40:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:33,186 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:33,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:33,186 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:40:33,186 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:40:33,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:33,186 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:33,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:40:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2022-02-24 01:40:33,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-24 01:40:33,380 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 56 [2022-02-24 01:40:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:33,380 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-24 01:40:33,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-24 01:40:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:33,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:33,381 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:33,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2022-02-24 01:40:33,381 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:33,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1902933949, now seen corresponding path program 243 times [2022-02-24 01:40:33,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:33,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593615338] [2022-02-24 01:40:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:33,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:33,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:33,382 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:33,382 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:33,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:33,654 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:33,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593615338] [2022-02-24 01:40:33,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [593615338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:33,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:33,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:33,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148318924] [2022-02-24 01:40:33,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:33,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:33,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:33,655 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:34,439 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:40:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:34,440 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:40:34,440 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:40:34,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:34,440 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:34,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 25 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:40:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2022-02-24 01:40:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-24 01:40:34,638 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 56 [2022-02-24 01:40:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:34,638 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-24 01:40:34,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-24 01:40:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:34,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:34,639 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:34,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2022-02-24 01:40:34,639 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:34,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1128947517, now seen corresponding path program 244 times [2022-02-24 01:40:34,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:34,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123987480] [2022-02-24 01:40:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:34,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:34,641 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:34,641 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:34,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:34,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:34,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123987480] [2022-02-24 01:40:34,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2123987480] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:34,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:34,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:34,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151514535] [2022-02-24 01:40:34,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:34,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:34,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:34,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:34,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:34,895 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:35,697 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:40:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:35,698 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:40:35,698 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:40:35,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:35,699 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:35,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:40:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 171. [2022-02-24 01:40:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-24 01:40:35,904 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 56 [2022-02-24 01:40:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:35,904 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-24 01:40:35,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-24 01:40:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:35,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:35,905 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:35,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2022-02-24 01:40:35,905 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:35,905 INFO L85 PathProgramCache]: Analyzing trace with hash 357328573, now seen corresponding path program 245 times [2022-02-24 01:40:35,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:35,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255720781] [2022-02-24 01:40:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:35,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:35,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:35,907 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:35,907 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:36,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:36,158 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:36,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255720781] [2022-02-24 01:40:36,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [255720781] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:36,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:36,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:36,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046630715] [2022-02-24 01:40:36,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:36,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:36,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:36,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:36,159 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:36,930 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:40:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:36,931 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:40:36,931 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:40:36,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:36,931 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:36,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:40:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 173. [2022-02-24 01:40:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-24 01:40:37,138 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 56 [2022-02-24 01:40:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:37,138 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-24 01:40:37,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-24 01:40:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:37,139 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:37,139 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:37,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2022-02-24 01:40:37,139 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:37,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1860865597, now seen corresponding path program 246 times [2022-02-24 01:40:37,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:37,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507168316] [2022-02-24 01:40:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:37,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:37,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:37,141 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:37,141 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:37,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:37,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:37,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507168316] [2022-02-24 01:40:37,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507168316] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:37,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:37,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:37,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120661670] [2022-02-24 01:40:37,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:37,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:37,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:37,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:37,401 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:38,217 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:40:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:38,217 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:38,218 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:40:38,218 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:40:38,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:38,218 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:38,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:40:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 175. [2022-02-24 01:40:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-24 01:40:38,429 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 56 [2022-02-24 01:40:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:38,429 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-24 01:40:38,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-24 01:40:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:38,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:38,429 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:38,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2022-02-24 01:40:38,430 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:38,430 INFO L85 PathProgramCache]: Analyzing trace with hash -644033091, now seen corresponding path program 247 times [2022-02-24 01:40:38,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:38,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647355857] [2022-02-24 01:40:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:38,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:38,431 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:38,431 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:38,432 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:38,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:38,686 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:38,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647355857] [2022-02-24 01:40:38,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [647355857] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:38,686 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:38,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:38,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838186298] [2022-02-24 01:40:38,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:38,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:38,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:38,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:38,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:38,687 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:39,511 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:40:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:39,512 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:40:39,512 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:40:39,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:39,512 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:39,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:40:39,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 177. [2022-02-24 01:40:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-24 01:40:39,725 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 56 [2022-02-24 01:40:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:39,726 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-24 01:40:39,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-24 01:40:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:39,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:39,726 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:39,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2022-02-24 01:40:39,726 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:39,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1624980797, now seen corresponding path program 248 times [2022-02-24 01:40:39,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:39,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980627368] [2022-02-24 01:40:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:39,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:39,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:39,728 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:39,728 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:39,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:39,986 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:39,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980627368] [2022-02-24 01:40:39,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [980627368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:39,986 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:39,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:39,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488714627] [2022-02-24 01:40:39,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:39,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:39,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:39,987 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:40,810 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:40:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:40,810 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:40,811 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:40:40,811 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:40:40,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:40,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:40,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:40:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 179. [2022-02-24 01:40:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-24 01:40:41,028 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 56 [2022-02-24 01:40:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:41,028 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-24 01:40:41,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-24 01:40:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:41,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:41,029 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:41,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2022-02-24 01:40:41,029 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:41,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:41,029 INFO L85 PathProgramCache]: Analyzing trace with hash 303940797, now seen corresponding path program 249 times [2022-02-24 01:40:41,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:41,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167157110] [2022-02-24 01:40:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:41,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:41,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:41,031 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:41,031 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:41,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:41,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:41,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167157110] [2022-02-24 01:40:41,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167157110] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:41,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:41,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:41,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721491098] [2022-02-24 01:40:41,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:41,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:41,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:41,284 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:42,123 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:40:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:42,123 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:42,124 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:40:42,124 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:40:42,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:42,124 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:42,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:40:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 181. [2022-02-24 01:40:42,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-24 01:40:42,343 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 56 [2022-02-24 01:40:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:42,343 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-24 01:40:42,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-24 01:40:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:42,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:42,343 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:42,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2022-02-24 01:40:42,343 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2094820413, now seen corresponding path program 250 times [2022-02-24 01:40:42,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:42,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433219949] [2022-02-24 01:40:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:42,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:42,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:42,345 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:42,345 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:42,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:42,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:42,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433219949] [2022-02-24 01:40:42,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [433219949] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:42,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:42,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:42,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253963391] [2022-02-24 01:40:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:42,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:42,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:42,598 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:43,444 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:40:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:43,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:43,444 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:40:43,445 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:40:43,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:43,445 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:43,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:40:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 183. [2022-02-24 01:40:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-24 01:40:43,669 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 56 [2022-02-24 01:40:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:43,669 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-24 01:40:43,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-24 01:40:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:43,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:43,670 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:43,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2022-02-24 01:40:43,670 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 848245693, now seen corresponding path program 251 times [2022-02-24 01:40:43,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:43,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451206695] [2022-02-24 01:40:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:43,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:43,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:43,672 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:43,672 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:43,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:43,924 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:43,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451206695] [2022-02-24 01:40:43,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [451206695] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:43,924 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:43,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:43,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283437462] [2022-02-24 01:40:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:43,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:43,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:43,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:43,925 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:44,768 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:40:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:44,769 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:40:44,769 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:40:44,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:44,769 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:44,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 15 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:40:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 185. [2022-02-24 01:40:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-24 01:40:45,068 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 56 [2022-02-24 01:40:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:45,068 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-24 01:40:45,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-24 01:40:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:40:45,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:45,068 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:45,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2022-02-24 01:40:45,069 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:45,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1185815357, now seen corresponding path program 252 times [2022-02-24 01:40:45,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:45,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887489504] [2022-02-24 01:40:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:45,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:45,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:45,072 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:45,072 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:45,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:45,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:45,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887489504] [2022-02-24 01:40:45,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [887489504] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:45,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:45,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:40:45,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014703342] [2022-02-24 01:40:45,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:45,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:40:45,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:40:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:40:45,329 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:46,112 INFO L93 Difference]: Finished difference Result 234 states and 341 transitions. [2022-02-24 01:40:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:40:46,112 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:40:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:46,113 INFO L225 Difference]: With dead ends: 234 [2022-02-24 01:40:46,113 INFO L226 Difference]: Without dead ends: 228 [2022-02-24 01:40:46,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:40:46,113 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:46,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-24 01:40:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 145. [2022-02-24 01:40:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-24 01:40:46,268 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 56 [2022-02-24 01:40:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:46,269 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-24 01:40:46,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-24 01:40:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:46,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:46,269 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:46,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2022-02-24 01:40:46,269 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:46,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1554703328, now seen corresponding path program 253 times [2022-02-24 01:40:46,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:46,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360315333] [2022-02-24 01:40:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:46,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:46,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:46,272 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:46,272 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:46,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:46,547 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:46,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360315333] [2022-02-24 01:40:46,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360315333] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:46,547 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:46,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:46,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099886709] [2022-02-24 01:40:46,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:46,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:46,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:46,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:46,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:46,548 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:47,259 INFO L93 Difference]: Finished difference Result 160 states and 231 transitions. [2022-02-24 01:40:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:47,260 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:47,261 INFO L225 Difference]: With dead ends: 160 [2022-02-24 01:40:47,261 INFO L226 Difference]: Without dead ends: 154 [2022-02-24 01:40:47,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:47,261 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:47,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 23 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-24 01:40:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2022-02-24 01:40:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-24 01:40:47,425 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 58 [2022-02-24 01:40:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:47,425 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-24 01:40:47,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-24 01:40:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:47,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:47,426 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:47,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2022-02-24 01:40:47,426 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:47,426 INFO L85 PathProgramCache]: Analyzing trace with hash 459754336, now seen corresponding path program 254 times [2022-02-24 01:40:47,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:47,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555749701] [2022-02-24 01:40:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:47,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:47,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:47,428 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:47,428 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:47,701 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:47,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555749701] [2022-02-24 01:40:47,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555749701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:47,702 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:47,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:47,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044200042] [2022-02-24 01:40:47,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:47,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:47,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:47,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:47,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:47,702 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:48,413 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-24 01:40:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:48,414 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:40:48,414 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:40:48,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:48,414 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:48,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:40:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2022-02-24 01:40:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-24 01:40:48,587 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 58 [2022-02-24 01:40:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:48,587 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-24 01:40:48,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-24 01:40:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:48,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:48,587 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:48,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2022-02-24 01:40:48,587 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:48,588 INFO L85 PathProgramCache]: Analyzing trace with hash 480760544, now seen corresponding path program 255 times [2022-02-24 01:40:48,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:48,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860233921] [2022-02-24 01:40:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:48,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:48,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:48,590 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:48,590 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:48,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:48,862 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:48,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860233921] [2022-02-24 01:40:48,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1860233921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:48,862 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:48,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:48,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873022150] [2022-02-24 01:40:48,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:48,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:48,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:48,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:48,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:48,863 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:49,588 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:40:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:49,588 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:49,589 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:40:49,589 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:40:49,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:49,589 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:49,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:40:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-02-24 01:40:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-24 01:40:49,767 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 58 [2022-02-24 01:40:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:49,768 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-24 01:40:49,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-24 01:40:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:49,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:49,768 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:49,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2022-02-24 01:40:49,768 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash -807110048, now seen corresponding path program 256 times [2022-02-24 01:40:49,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:49,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805324966] [2022-02-24 01:40:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:49,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:49,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:49,770 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:49,770 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:50,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:50,106 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:50,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805324966] [2022-02-24 01:40:50,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [805324966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:50,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:50,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:50,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691673993] [2022-02-24 01:40:50,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:50,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:50,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:50,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:50,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:50,108 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:50,872 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:40:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:50,873 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:50,873 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:40:50,873 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:40:50,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:50,874 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:50,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 33 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:40:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2022-02-24 01:40:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-24 01:40:51,055 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 58 [2022-02-24 01:40:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:51,055 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-24 01:40:51,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-24 01:40:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:51,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:51,055 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:51,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2022-02-24 01:40:51,055 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1500167712, now seen corresponding path program 257 times [2022-02-24 01:40:51,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:51,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678261577] [2022-02-24 01:40:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:51,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:51,057 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:51,057 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:51,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:51,329 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:51,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678261577] [2022-02-24 01:40:51,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678261577] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:51,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:51,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:51,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410846133] [2022-02-24 01:40:51,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:51,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:51,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:51,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:51,330 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:52,077 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:40:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:52,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:52,078 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:40:52,078 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:40:52,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:52,078 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:52,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:40:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2022-02-24 01:40:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-24 01:40:52,266 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 58 [2022-02-24 01:40:52,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:52,266 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-24 01:40:52,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:52,266 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-24 01:40:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:52,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:52,266 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:52,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2022-02-24 01:40:52,266 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:52,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1808651936, now seen corresponding path program 258 times [2022-02-24 01:40:52,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:52,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350335579] [2022-02-24 01:40:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:52,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:52,268 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:52,268 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:52,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:52,540 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:52,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350335579] [2022-02-24 01:40:52,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [350335579] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:52,540 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:52,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:52,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245342400] [2022-02-24 01:40:52,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:52,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:52,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:52,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:52,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:52,541 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:53,299 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:40:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:53,300 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:53,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:53,300 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:40:53,300 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:40:53,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:53,300 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:53,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:40:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 161. [2022-02-24 01:40:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-24 01:40:53,494 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 58 [2022-02-24 01:40:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:53,494 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-24 01:40:53,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-24 01:40:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:53,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:53,494 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:53,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2022-02-24 01:40:53,495 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:53,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:53,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1909247776, now seen corresponding path program 259 times [2022-02-24 01:40:53,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:53,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272385696] [2022-02-24 01:40:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:53,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:53,496 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:53,496 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:53,496 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:53,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:53,791 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:53,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272385696] [2022-02-24 01:40:53,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [272385696] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:53,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:53,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:53,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406327416] [2022-02-24 01:40:53,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:53,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:53,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:53,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:53,792 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:54,557 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:40:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:54,557 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:54,558 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:40:54,558 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:40:54,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:54,558 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:54,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:54,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:40:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 163. [2022-02-24 01:40:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-24 01:40:54,755 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 58 [2022-02-24 01:40:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:54,755 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-24 01:40:54,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-24 01:40:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:54,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:54,755 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:54,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2022-02-24 01:40:54,755 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:54,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:54,756 INFO L85 PathProgramCache]: Analyzing trace with hash 202397792, now seen corresponding path program 260 times [2022-02-24 01:40:54,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:54,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694063430] [2022-02-24 01:40:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:54,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:54,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:54,757 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:54,757 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:55,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:55,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:55,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694063430] [2022-02-24 01:40:55,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [694063430] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:55,035 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:55,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:55,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012194504] [2022-02-24 01:40:55,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:55,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:55,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:55,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:55,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:55,036 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:55,818 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:40:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:55,818 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:40:55,818 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:40:55,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:55,819 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:55,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:40:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 165. [2022-02-24 01:40:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-24 01:40:56,017 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 58 [2022-02-24 01:40:56,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:56,017 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-24 01:40:56,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-24 01:40:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:56,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:56,018 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:56,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2022-02-24 01:40:56,018 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:56,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:56,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2025742368, now seen corresponding path program 261 times [2022-02-24 01:40:56,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:56,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391149620] [2022-02-24 01:40:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:56,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:56,020 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:56,020 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:56,020 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:56,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:56,306 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:56,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391149620] [2022-02-24 01:40:56,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1391149620] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:56,306 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:56,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:56,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431791955] [2022-02-24 01:40:56,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:56,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:56,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:56,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:56,307 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:57,102 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:40:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:57,102 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:57,102 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:40:57,102 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:40:57,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:57,103 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:57,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:40:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2022-02-24 01:40:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-24 01:40:57,308 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 58 [2022-02-24 01:40:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:57,308 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-24 01:40:57,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-24 01:40:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:57,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:57,308 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:57,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2022-02-24 01:40:57,308 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash -79755424, now seen corresponding path program 262 times [2022-02-24 01:40:57,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:57,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836979856] [2022-02-24 01:40:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:57,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:57,310 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:57,310 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:57,310 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:57,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:57,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:57,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836979856] [2022-02-24 01:40:57,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1836979856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:57,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:57,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:57,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837202197] [2022-02-24 01:40:57,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:57,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:57,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:57,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:57,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:57,588 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:58,400 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:40:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:58,400 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:58,400 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:40:58,400 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:40:58,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:58,401 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:58,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:40:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 169. [2022-02-24 01:40:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-24 01:40:58,625 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 58 [2022-02-24 01:40:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:58,625 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-24 01:40:58,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-24 01:40:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:58,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:58,626 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:58,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2022-02-24 01:40:58,626 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1702924000, now seen corresponding path program 263 times [2022-02-24 01:40:58,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:58,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104849784] [2022-02-24 01:40:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:58,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:58,628 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:58,628 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:58,628 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:58,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:40:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:40:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:40:58,898 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:40:58,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104849784] [2022-02-24 01:40:58,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104849784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:40:58,898 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:40:58,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:40:58,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361446735] [2022-02-24 01:40:58,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:40:58,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:40:58,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:40:58,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:40:58,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:40:58,899 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:40:59,719 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:40:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:40:59,719 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:40:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:40:59,719 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:40:59,719 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:40:59,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:40:59,720 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:40:59,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:40:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:40:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 171. [2022-02-24 01:40:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:59,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-24 01:40:59,937 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 58 [2022-02-24 01:40:59,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:40:59,937 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-24 01:40:59,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:40:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-24 01:40:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:40:59,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:40:59,937 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:40:59,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2022-02-24 01:40:59,937 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:40:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:40:59,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1165899360, now seen corresponding path program 264 times [2022-02-24 01:40:59,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:40:59,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111167221] [2022-02-24 01:40:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:40:59,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:40:59,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:40:59,939 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:40:59,939 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:40:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:00,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:00,216 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:00,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111167221] [2022-02-24 01:41:00,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [111167221] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:00,216 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:00,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:00,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748146372] [2022-02-24 01:41:00,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:00,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:00,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:00,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:00,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:00,219 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:01,053 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:41:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:01,053 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:01,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:01,054 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:41:01,054 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:41:01,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:01,054 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:01,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:41:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 173. [2022-02-24 01:41:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-24 01:41:01,272 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 58 [2022-02-24 01:41:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:01,272 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-24 01:41:01,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-24 01:41:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:01,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:01,273 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:01,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2022-02-24 01:41:01,273 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash 481295840, now seen corresponding path program 265 times [2022-02-24 01:41:01,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:01,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253614244] [2022-02-24 01:41:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:01,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:01,275 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:01,275 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:01,275 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:01,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:01,553 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:01,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253614244] [2022-02-24 01:41:01,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [253614244] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:01,554 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:01,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:01,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280712108] [2022-02-24 01:41:01,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:01,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:01,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:01,554 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:02,400 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:41:02,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:02,401 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:02,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:02,401 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:41:02,401 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:41:02,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:02,401 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:02,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 23 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:41:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 175. [2022-02-24 01:41:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-24 01:41:02,622 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 58 [2022-02-24 01:41:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:02,622 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-24 01:41:02,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-24 01:41:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:02,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:02,623 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:02,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2022-02-24 01:41:02,623 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:02,623 INFO L85 PathProgramCache]: Analyzing trace with hash -292690592, now seen corresponding path program 266 times [2022-02-24 01:41:02,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:02,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473765130] [2022-02-24 01:41:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:02,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:02,624 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:02,624 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:02,624 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:02,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:02,893 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:02,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473765130] [2022-02-24 01:41:02,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [473765130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:02,893 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:02,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:02,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752314204] [2022-02-24 01:41:02,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:02,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:02,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:02,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:02,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:02,894 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:03,761 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:41:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:03,761 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:41:03,761 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:41:03,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:03,762 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:03,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 18 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:41:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2022-02-24 01:41:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-24 01:41:03,993 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 58 [2022-02-24 01:41:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:03,993 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-24 01:41:03,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-24 01:41:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:03,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:03,994 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:03,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2022-02-24 01:41:03,994 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:03,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1064309536, now seen corresponding path program 267 times [2022-02-24 01:41:03,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:03,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940618581] [2022-02-24 01:41:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:03,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:03,996 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:03,996 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:03,996 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:04,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:04,267 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:04,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940618581] [2022-02-24 01:41:04,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1940618581] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:04,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:04,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:04,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469371964] [2022-02-24 01:41:04,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:04,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:04,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:04,268 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:05,145 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:41:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:05,145 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:05,146 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:41:05,146 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:41:05,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:05,146 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:05,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 25 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:05,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:41:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 179. [2022-02-24 01:41:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-24 01:41:05,389 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 58 [2022-02-24 01:41:05,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:05,389 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-24 01:41:05,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-24 01:41:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:05,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:05,389 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:05,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2022-02-24 01:41:05,389 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:05,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:05,390 INFO L85 PathProgramCache]: Analyzing trace with hash 439227488, now seen corresponding path program 268 times [2022-02-24 01:41:05,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:05,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830461509] [2022-02-24 01:41:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:05,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:05,391 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:05,391 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:05,391 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:05,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:05,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:05,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830461509] [2022-02-24 01:41:05,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [830461509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:05,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:05,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:05,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365960605] [2022-02-24 01:41:05,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:05,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:05,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:05,665 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:06,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:06,555 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:41:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:06,555 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:06,556 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:41:06,556 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:41:06,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:06,556 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:06,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 23 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:41:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 181. [2022-02-24 01:41:06,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-24 01:41:06,799 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 58 [2022-02-24 01:41:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:06,799 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-24 01:41:06,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-24 01:41:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:06,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:06,800 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:06,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2022-02-24 01:41:06,800 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:06,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2065671200, now seen corresponding path program 269 times [2022-02-24 01:41:06,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:06,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824087538] [2022-02-24 01:41:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:06,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:06,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:06,801 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:06,801 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:07,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:07,079 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:07,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824087538] [2022-02-24 01:41:07,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824087538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:07,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:07,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:07,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187749916] [2022-02-24 01:41:07,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:07,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:07,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:07,080 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:07,979 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:41:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:07,979 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:07,980 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:41:07,980 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:41:07,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:07,980 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:07,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:41:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 183. [2022-02-24 01:41:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-24 01:41:08,226 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 58 [2022-02-24 01:41:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:08,226 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-24 01:41:08,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-24 01:41:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:08,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:08,226 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:08,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2022-02-24 01:41:08,226 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash 203342688, now seen corresponding path program 270 times [2022-02-24 01:41:08,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:08,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973146840] [2022-02-24 01:41:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:08,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:08,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:08,228 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:08,228 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:08,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:08,501 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:08,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973146840] [2022-02-24 01:41:08,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [973146840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:08,501 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:08,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:08,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574499833] [2022-02-24 01:41:08,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:08,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:08,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:08,502 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:09,408 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:41:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:09,409 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:41:09,409 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:41:09,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:09,409 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:09,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:41:09,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 185. [2022-02-24 01:41:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:09,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-24 01:41:09,657 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 58 [2022-02-24 01:41:09,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:09,658 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-24 01:41:09,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:09,658 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-24 01:41:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:09,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:09,658 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:09,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2022-02-24 01:41:09,658 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1117697312, now seen corresponding path program 271 times [2022-02-24 01:41:09,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:09,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200533119] [2022-02-24 01:41:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:09,660 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:09,660 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:09,660 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:09,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:09,931 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:09,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200533119] [2022-02-24 01:41:09,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200533119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:09,931 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:09,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:09,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850786635] [2022-02-24 01:41:09,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:09,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:09,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:09,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:09,932 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:10,842 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:41:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:10,842 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:10,843 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:41:10,843 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:41:10,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:10,843 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:10,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:41:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 187. [2022-02-24 01:41:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-24 01:41:11,094 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 58 [2022-02-24 01:41:11,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:11,094 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-24 01:41:11,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-24 01:41:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:11,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:11,094 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:11,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2022-02-24 01:41:11,094 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:11,095 INFO L85 PathProgramCache]: Analyzing trace with hash 673182304, now seen corresponding path program 272 times [2022-02-24 01:41:11,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:11,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882775574] [2022-02-24 01:41:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:11,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:11,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:11,096 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:11,096 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:11,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:11,375 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:11,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882775574] [2022-02-24 01:41:11,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1882775574] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:11,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:11,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:11,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739918532] [2022-02-24 01:41:11,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:11,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:11,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:11,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:11,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:11,376 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:12,303 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:41:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:12,303 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:12,304 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:41:12,304 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:41:12,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:12,304 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:12,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:41:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 189. [2022-02-24 01:41:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-24 01:41:12,613 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 58 [2022-02-24 01:41:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:12,613 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-24 01:41:12,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-24 01:41:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:12,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:12,613 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:12,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2022-02-24 01:41:12,613 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:12,613 INFO L85 PathProgramCache]: Analyzing trace with hash -573392416, now seen corresponding path program 273 times [2022-02-24 01:41:12,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:12,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168759275] [2022-02-24 01:41:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:12,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:12,615 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:12,615 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:12,615 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:12,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:12,885 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:12,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168759275] [2022-02-24 01:41:12,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [168759275] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:12,885 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:12,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:12,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937052613] [2022-02-24 01:41:12,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:12,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:12,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:12,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:12,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:12,886 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:13,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:13,826 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:41:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:13,827 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:41:13,827 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:41:13,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:13,827 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:13,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:41:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 191. [2022-02-24 01:41:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-24 01:41:14,084 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 58 [2022-02-24 01:41:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:14,084 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-24 01:41:14,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-24 01:41:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:14,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:14,084 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:14,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2022-02-24 01:41:14,085 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash -235822752, now seen corresponding path program 274 times [2022-02-24 01:41:14,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:14,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876829465] [2022-02-24 01:41:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:14,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:14,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:14,086 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:14,086 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:14,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:14,360 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:14,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876829465] [2022-02-24 01:41:14,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [876829465] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:14,360 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:14,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:14,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630027726] [2022-02-24 01:41:14,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:14,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:14,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:14,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:14,361 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:15,290 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:41:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:15,290 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:15,290 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:41:15,290 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:41:15,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:15,291 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:15,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 25 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:41:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 193. [2022-02-24 01:41:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-24 01:41:15,547 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 58 [2022-02-24 01:41:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:15,547 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-24 01:41:15,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-24 01:41:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:41:15,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:15,548 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:15,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2022-02-24 01:41:15,548 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2046077152, now seen corresponding path program 275 times [2022-02-24 01:41:15,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:15,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582197957] [2022-02-24 01:41:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:15,549 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:15,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:15,550 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:15,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:15,820 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:15,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582197957] [2022-02-24 01:41:15,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [582197957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:15,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:15,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:41:15,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241987130] [2022-02-24 01:41:15,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:15,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:41:15,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:15,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:41:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:41:15,821 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:16,675 INFO L93 Difference]: Finished difference Result 244 states and 356 transitions. [2022-02-24 01:41:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:41:16,675 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:41:16,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:16,675 INFO L225 Difference]: With dead ends: 244 [2022-02-24 01:41:16,675 INFO L226 Difference]: Without dead ends: 238 [2022-02-24 01:41:16,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:41:16,676 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:16,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-02-24 01:41:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 151. [2022-02-24 01:41:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-24 01:41:16,852 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 58 [2022-02-24 01:41:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:16,853 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-24 01:41:16,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-24 01:41:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:16,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:16,853 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:16,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2022-02-24 01:41:16,853 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:16,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1160080707, now seen corresponding path program 276 times [2022-02-24 01:41:16,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:16,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821674597] [2022-02-24 01:41:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:16,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:16,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:16,855 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:16,855 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:17,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:17,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:17,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821674597] [2022-02-24 01:41:17,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [821674597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:17,144 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:17,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:17,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795126082] [2022-02-24 01:41:17,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:17,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:17,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:17,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:17,145 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:17,908 INFO L93 Difference]: Finished difference Result 166 states and 240 transitions. [2022-02-24 01:41:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:17,909 INFO L225 Difference]: With dead ends: 166 [2022-02-24 01:41:17,909 INFO L226 Difference]: Without dead ends: 160 [2022-02-24 01:41:17,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:17,909 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:17,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 17 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-24 01:41:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-02-24 01:41:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-24 01:41:18,091 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 60 [2022-02-24 01:41:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:18,091 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-24 01:41:18,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-24 01:41:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:18,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:18,092 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:18,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2022-02-24 01:41:18,092 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash 65131715, now seen corresponding path program 277 times [2022-02-24 01:41:18,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:18,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210311550] [2022-02-24 01:41:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:18,093 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:18,093 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:18,093 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:18,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:18,386 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:18,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210311550] [2022-02-24 01:41:18,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210311550] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:18,386 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:18,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:18,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778294767] [2022-02-24 01:41:18,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:18,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:18,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:18,388 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:19,165 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-24 01:41:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:19,165 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:19,166 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:41:19,166 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:41:19,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:19,166 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:19,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 23 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:41:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 159. [2022-02-24 01:41:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-24 01:41:19,364 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 60 [2022-02-24 01:41:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:19,364 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-24 01:41:19,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-24 01:41:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:19,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:19,364 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:19,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2022-02-24 01:41:19,364 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:19,365 INFO L85 PathProgramCache]: Analyzing trace with hash 86137923, now seen corresponding path program 278 times [2022-02-24 01:41:19,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:19,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488348114] [2022-02-24 01:41:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:19,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:19,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:19,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:19,366 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:19,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:19,656 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:19,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488348114] [2022-02-24 01:41:19,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [488348114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:19,656 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:19,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:19,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214120512] [2022-02-24 01:41:19,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:19,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:19,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:19,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:19,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:19,657 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:20,433 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:41:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:20,434 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:41:20,434 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:41:20,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:20,434 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:20,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:41:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2022-02-24 01:41:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-24 01:41:20,633 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 60 [2022-02-24 01:41:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:20,633 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-24 01:41:20,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-24 01:41:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:20,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:20,634 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:20,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2022-02-24 01:41:20,634 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:20,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:20,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1201732669, now seen corresponding path program 279 times [2022-02-24 01:41:20,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:20,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516554884] [2022-02-24 01:41:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:20,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:20,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:20,638 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:20,638 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:20,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:20,926 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:20,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516554884] [2022-02-24 01:41:20,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [516554884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:20,926 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:20,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:20,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366755811] [2022-02-24 01:41:20,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:20,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:20,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:20,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:20,927 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:21,722 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:41:21,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:21,723 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:21,723 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:41:21,723 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:41:21,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:21,723 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:21,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:41:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 163. [2022-02-24 01:41:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-24 01:41:21,928 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 60 [2022-02-24 01:41:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:21,928 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-24 01:41:21,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-24 01:41:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:21,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:21,929 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:21,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2022-02-24 01:41:21,929 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:21,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1894790333, now seen corresponding path program 280 times [2022-02-24 01:41:21,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:21,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889698954] [2022-02-24 01:41:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:21,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:21,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:21,931 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:21,931 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:22,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:22,222 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:22,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889698954] [2022-02-24 01:41:22,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1889698954] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:22,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:22,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:22,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206650573] [2022-02-24 01:41:22,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:22,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:22,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:22,223 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:23,023 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:41:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:23,024 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:23,024 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:41:23,024 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:41:23,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:23,024 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:23,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:41:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2022-02-24 01:41:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-24 01:41:23,236 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 60 [2022-02-24 01:41:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:23,236 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-24 01:41:23,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-24 01:41:23,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:23,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:23,237 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:23,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2022-02-24 01:41:23,237 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2091692739, now seen corresponding path program 281 times [2022-02-24 01:41:23,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:23,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065584771] [2022-02-24 01:41:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:23,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:23,238 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:23,238 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:23,238 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:23,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:23,579 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:23,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065584771] [2022-02-24 01:41:23,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065584771] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:23,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:23,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:23,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689566044] [2022-02-24 01:41:23,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:23,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:23,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:23,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:23,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:23,580 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:24,397 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:41:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:24,398 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:41:24,398 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:41:24,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:24,398 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:24,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:41:24,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2022-02-24 01:41:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-24 01:41:24,612 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 60 [2022-02-24 01:41:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:24,612 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-24 01:41:24,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-24 01:41:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:24,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:24,612 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:24,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2022-02-24 01:41:24,613 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:24,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1991096899, now seen corresponding path program 282 times [2022-02-24 01:41:24,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:24,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400296520] [2022-02-24 01:41:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:24,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:24,614 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:24,614 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:24,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:24,905 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:24,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400296520] [2022-02-24 01:41:24,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400296520] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:24,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:24,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:24,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926241636] [2022-02-24 01:41:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:24,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:24,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:24,906 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:25,742 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:41:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:25,743 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:41:25,743 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:41:25,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:25,743 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:25,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:41:25,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 169. [2022-02-24 01:41:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-24 01:41:25,962 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 60 [2022-02-24 01:41:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:25,963 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-24 01:41:25,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:25,963 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-24 01:41:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:25,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:25,963 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:25,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2022-02-24 01:41:25,963 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:25,963 INFO L85 PathProgramCache]: Analyzing trace with hash -192224829, now seen corresponding path program 283 times [2022-02-24 01:41:25,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:25,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790800316] [2022-02-24 01:41:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:25,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:25,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:25,965 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:25,965 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:26,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:26,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:26,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790800316] [2022-02-24 01:41:26,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790800316] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:26,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:26,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:26,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067290987] [2022-02-24 01:41:26,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:26,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:26,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:26,265 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:27,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:27,157 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:41:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:27,157 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:27,157 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:41:27,157 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:41:27,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:27,158 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:27,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:41:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 171. [2022-02-24 01:41:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-24 01:41:27,384 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 60 [2022-02-24 01:41:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:27,385 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-24 01:41:27,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-24 01:41:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:27,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:27,385 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:27,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2022-02-24 01:41:27,385 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:27,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1874602307, now seen corresponding path program 284 times [2022-02-24 01:41:27,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:27,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684386146] [2022-02-24 01:41:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:27,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:27,387 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:27,387 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:27,387 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:27,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:27,677 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:27,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684386146] [2022-02-24 01:41:27,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1684386146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:27,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:27,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:27,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803101117] [2022-02-24 01:41:27,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:27,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:27,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:27,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:27,678 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:28,512 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:41:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:28,512 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:28,512 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:41:28,512 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:41:28,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:28,513 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:28,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:41:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 173. [2022-02-24 01:41:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-24 01:41:28,731 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 60 [2022-02-24 01:41:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:28,732 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-24 01:41:28,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-24 01:41:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:28,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:28,732 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:28,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2022-02-24 01:41:28,732 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:28,732 INFO L85 PathProgramCache]: Analyzing trace with hash -474378045, now seen corresponding path program 285 times [2022-02-24 01:41:28,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:28,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291279597] [2022-02-24 01:41:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:28,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:28,734 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:28,734 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:28,734 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:29,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:29,018 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:29,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291279597] [2022-02-24 01:41:29,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [291279597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:29,018 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:29,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:29,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782596807] [2022-02-24 01:41:29,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:29,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:29,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:29,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:29,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:29,019 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:29,848 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:41:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:29,849 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:41:29,849 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:41:29,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:29,850 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:29,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:41:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2022-02-24 01:41:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:30,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-24 01:41:30,076 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 60 [2022-02-24 01:41:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:30,076 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-24 01:41:30,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:30,076 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-24 01:41:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:30,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:30,077 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:30,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2022-02-24 01:41:30,077 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:30,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1308301379, now seen corresponding path program 286 times [2022-02-24 01:41:30,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:30,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516556940] [2022-02-24 01:41:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:30,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:30,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:30,078 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:30,078 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:30,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:30,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:30,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516556940] [2022-02-24 01:41:30,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [516556940] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:30,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:30,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:30,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11367345] [2022-02-24 01:41:30,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:30,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:30,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:30,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:30,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:30,365 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:31,215 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:41:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:31,215 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:31,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:31,216 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:41:31,216 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:41:31,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:31,216 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:31,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:41:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 177. [2022-02-24 01:41:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-24 01:41:31,449 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 60 [2022-02-24 01:41:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:31,449 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-24 01:41:31,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-24 01:41:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:31,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:31,450 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:31,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2022-02-24 01:41:31,450 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:31,450 INFO L85 PathProgramCache]: Analyzing trace with hash 771276739, now seen corresponding path program 287 times [2022-02-24 01:41:31,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:31,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42787776] [2022-02-24 01:41:31,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:31,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:31,451 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:31,452 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:31,452 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:31,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:31,736 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:31,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42787776] [2022-02-24 01:41:31,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [42787776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:31,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:31,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:31,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059234791] [2022-02-24 01:41:31,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:31,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:31,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:31,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:31,737 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:32,612 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:41:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:32,612 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:32,613 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:41:32,613 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:41:32,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:32,613 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:32,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:41:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 179. [2022-02-24 01:41:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-24 01:41:32,856 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 60 [2022-02-24 01:41:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:32,856 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-24 01:41:32,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-24 01:41:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:32,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:32,856 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:32,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2022-02-24 01:41:32,857 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash 86673219, now seen corresponding path program 288 times [2022-02-24 01:41:32,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:32,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878348250] [2022-02-24 01:41:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:32,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:32,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:32,858 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:32,858 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:33,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:33,143 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:33,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878348250] [2022-02-24 01:41:33,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878348250] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:33,143 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:33,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:33,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19241351] [2022-02-24 01:41:33,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:33,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:33,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:33,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:33,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:33,144 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:34,016 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:41:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:34,016 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:34,017 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:41:34,017 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:41:34,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:34,017 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:34,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:41:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 181. [2022-02-24 01:41:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-24 01:41:34,259 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 60 [2022-02-24 01:41:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:34,259 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-24 01:41:34,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:34,260 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-24 01:41:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:34,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:34,260 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:34,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2022-02-24 01:41:34,260 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash -687313213, now seen corresponding path program 289 times [2022-02-24 01:41:34,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:34,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741714113] [2022-02-24 01:41:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:34,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:34,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:34,262 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:34,262 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:34,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:34,610 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:34,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741714113] [2022-02-24 01:41:34,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741714113] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:34,611 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:34,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:34,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383831526] [2022-02-24 01:41:34,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:34,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:34,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:34,612 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:35,504 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:41:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:35,504 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:35,504 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:41:35,504 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:41:35,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:35,505 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:35,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:41:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 183. [2022-02-24 01:41:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-24 01:41:35,752 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 60 [2022-02-24 01:41:35,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:35,752 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-24 01:41:35,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-24 01:41:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:35,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:35,752 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:35,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2022-02-24 01:41:35,752 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:35,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:35,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1458932157, now seen corresponding path program 290 times [2022-02-24 01:41:35,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:35,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051889665] [2022-02-24 01:41:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:35,754 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:35,754 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:35,754 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:36,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:36,039 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:36,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051889665] [2022-02-24 01:41:36,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051889665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:36,039 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:36,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:36,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201047953] [2022-02-24 01:41:36,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:36,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:36,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:36,040 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:36,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:36,953 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:41:36,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:36,954 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:36,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:36,954 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:41:36,954 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:41:36,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:36,954 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:36,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 27 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:41:37,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2022-02-24 01:41:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-24 01:41:37,207 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 60 [2022-02-24 01:41:37,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:37,207 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-24 01:41:37,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-24 01:41:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:37,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:37,207 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:37,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2022-02-24 01:41:37,207 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash 44604867, now seen corresponding path program 291 times [2022-02-24 01:41:37,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:37,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162301647] [2022-02-24 01:41:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:37,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:37,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:37,209 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:37,209 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:37,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:37,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162301647] [2022-02-24 01:41:37,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162301647] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:37,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:37,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:37,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954550139] [2022-02-24 01:41:37,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:37,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:37,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:37,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:37,494 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:38,417 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:41:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:38,418 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:41:38,418 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:41:38,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:38,418 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:38,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 23 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:41:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 187. [2022-02-24 01:41:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-24 01:41:38,671 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 60 [2022-02-24 01:41:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:38,671 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-24 01:41:38,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-24 01:41:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:38,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:38,672 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:38,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2022-02-24 01:41:38,672 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1834673475, now seen corresponding path program 292 times [2022-02-24 01:41:38,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:38,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332934675] [2022-02-24 01:41:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:38,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:38,673 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:38,673 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:38,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:38,959 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:38,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332934675] [2022-02-24 01:41:38,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [332934675] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:38,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:38,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:38,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120604391] [2022-02-24 01:41:38,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:38,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:38,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:38,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:38,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:38,960 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:39,892 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:41:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:39,893 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:41:39,893 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:41:39,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:39,893 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:39,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:41:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 189. [2022-02-24 01:41:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-24 01:41:40,154 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 60 [2022-02-24 01:41:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:40,154 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-24 01:41:40,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-24 01:41:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:40,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:40,154 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:40,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2022-02-24 01:41:40,155 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash -191279933, now seen corresponding path program 293 times [2022-02-24 01:41:40,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:40,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448584909] [2022-02-24 01:41:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:40,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:40,156 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:40,156 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:40,156 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:40,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:40,441 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:40,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448584909] [2022-02-24 01:41:40,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448584909] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:40,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:40,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:40,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014182634] [2022-02-24 01:41:40,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:40,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:40,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:40,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:40,442 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:41,386 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:41:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:41,387 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:41,387 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:41:41,387 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:41:41,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:41,387 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:41,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:41:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2022-02-24 01:41:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-24 01:41:41,650 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 60 [2022-02-24 01:41:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:41,650 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-24 01:41:41,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-24 01:41:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:41,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:41,650 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:41,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2022-02-24 01:41:41,650 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1512319933, now seen corresponding path program 294 times [2022-02-24 01:41:41,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:41,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875820519] [2022-02-24 01:41:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:41,652 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:41,652 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:41,652 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:41,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:41,940 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:41,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875820519] [2022-02-24 01:41:41,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [875820519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:41,940 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:41,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:41,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360026353] [2022-02-24 01:41:41,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:41,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:41,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:41,941 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:42,895 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:41:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:42,895 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:42,896 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:41:42,896 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:41:42,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:42,896 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:42,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 27 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:41:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 193. [2022-02-24 01:41:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-24 01:41:43,162 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 60 [2022-02-24 01:41:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:43,163 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-24 01:41:43,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-24 01:41:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:43,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:43,163 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:43,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2022-02-24 01:41:43,163 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash 278559683, now seen corresponding path program 295 times [2022-02-24 01:41:43,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:43,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791984074] [2022-02-24 01:41:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:43,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:43,165 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:43,165 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:43,165 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:43,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:43,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:43,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791984074] [2022-02-24 01:41:43,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791984074] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:43,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:43,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:43,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893475870] [2022-02-24 01:41:43,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:43,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:43,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:43,451 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:44,409 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:41:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:44,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:44,410 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:41:44,410 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:41:44,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:44,410 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:44,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 23 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:41:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 195. [2022-02-24 01:41:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-24 01:41:44,681 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 60 [2022-02-24 01:41:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:44,681 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-24 01:41:44,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:44,681 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-24 01:41:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:44,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:44,681 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:44,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2022-02-24 01:41:44,682 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash -968015037, now seen corresponding path program 296 times [2022-02-24 01:41:44,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:44,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36492408] [2022-02-24 01:41:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:44,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:44,683 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:44,683 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:44,683 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:44,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:44,969 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:44,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36492408] [2022-02-24 01:41:44,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [36492408] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:44,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:44,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:44,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190459278] [2022-02-24 01:41:44,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:44,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:44,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:44,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:44,970 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:45,933 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:41:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:45,933 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:45,934 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:41:45,934 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:41:45,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:45,934 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:45,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:41:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 197. [2022-02-24 01:41:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-24 01:41:46,205 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 60 [2022-02-24 01:41:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:46,205 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-24 01:41:46,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-24 01:41:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:46,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:46,206 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:46,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2022-02-24 01:41:46,206 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash -630445373, now seen corresponding path program 297 times [2022-02-24 01:41:46,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:46,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52254455] [2022-02-24 01:41:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:46,207 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:46,208 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:46,208 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:46,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:46,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:46,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52254455] [2022-02-24 01:41:46,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [52254455] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:46,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:46,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:46,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292052079] [2022-02-24 01:41:46,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:46,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:46,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:46,494 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:47,467 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-24 01:41:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:47,468 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:41:47,468 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:41:47,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:47,468 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:47,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:41:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 199. [2022-02-24 01:41:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-24 01:41:47,741 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 60 [2022-02-24 01:41:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:47,741 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-24 01:41:47,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-24 01:41:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:47,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:47,742 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:47,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2022-02-24 01:41:47,742 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:47,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1651454531, now seen corresponding path program 298 times [2022-02-24 01:41:47,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:47,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083753854] [2022-02-24 01:41:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:47,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:47,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:47,744 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:47,744 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:48,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:48,029 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:48,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083753854] [2022-02-24 01:41:48,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083753854] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:48,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:48,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:48,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324826209] [2022-02-24 01:41:48,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:48,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:48,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:48,030 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:49,010 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-24 01:41:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:49,011 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:41:49,011 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:41:49,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:49,011 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:49,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:41:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 201. [2022-02-24 01:41:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-24 01:41:49,288 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 60 [2022-02-24 01:41:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:49,288 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-24 01:41:49,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-24 01:41:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:41:49,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:49,288 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:49,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2022-02-24 01:41:49,288 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:49,289 INFO L85 PathProgramCache]: Analyzing trace with hash -171025981, now seen corresponding path program 299 times [2022-02-24 01:41:49,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:49,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743114627] [2022-02-24 01:41:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:49,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:49,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:49,290 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:49,290 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:49,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:49,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:49,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743114627] [2022-02-24 01:41:49,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1743114627] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:49,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:49,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:41:49,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176489873] [2022-02-24 01:41:49,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:49,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:41:49,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:49,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:41:49,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:41:49,576 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:50,469 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:41:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:41:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:41:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:50,470 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:41:50,470 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:41:50,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:41:50,470 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:50,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:50,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:41:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 157. [2022-02-24 01:41:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-24 01:41:50,661 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 60 [2022-02-24 01:41:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:50,661 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-24 01:41:50,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-24 01:41:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:41:50,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:50,661 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:50,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2022-02-24 01:41:50,662 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:50,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash -115136026, now seen corresponding path program 300 times [2022-02-24 01:41:50,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:50,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412612193] [2022-02-24 01:41:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:50,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:50,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:50,663 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:50,663 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:50,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:50,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:50,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412612193] [2022-02-24 01:41:50,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [412612193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:50,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:50,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:41:50,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136028151] [2022-02-24 01:41:50,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:50,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:41:50,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:50,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:41:50,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:41:50,966 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:51,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:51,756 INFO L93 Difference]: Finished difference Result 172 states and 249 transitions. [2022-02-24 01:41:51,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:41:51,756 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:41:51,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:51,756 INFO L225 Difference]: With dead ends: 172 [2022-02-24 01:41:51,756 INFO L226 Difference]: Without dead ends: 166 [2022-02-24 01:41:51,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:41:51,757 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:51,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 19 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-02-24 01:41:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2022-02-24 01:41:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-24 01:41:51,953 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 62 [2022-02-24 01:41:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:51,953 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-24 01:41:51,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-24 01:41:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:41:51,954 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:51,954 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:51,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2022-02-24 01:41:51,954 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1210085018, now seen corresponding path program 301 times [2022-02-24 01:41:51,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:51,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474267513] [2022-02-24 01:41:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:51,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:51,955 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:51,955 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:51,955 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:52,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:52,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:52,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474267513] [2022-02-24 01:41:52,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [474267513] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:52,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:52,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:41:52,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664606970] [2022-02-24 01:41:52,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:52,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:41:52,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:52,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:41:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:41:52,261 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:53,051 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-24 01:41:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:41:53,051 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:41:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:53,051 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:41:53,051 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:41:53,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:41:53,052 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:53,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:41:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2022-02-24 01:41:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-24 01:41:53,259 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 62 [2022-02-24 01:41:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:53,259 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-24 01:41:53,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-24 01:41:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:41:53,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:53,260 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:53,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2022-02-24 01:41:53,260 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1189078810, now seen corresponding path program 302 times [2022-02-24 01:41:53,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:53,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259103811] [2022-02-24 01:41:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:53,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:53,262 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:53,262 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:53,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:53,569 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:53,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259103811] [2022-02-24 01:41:53,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259103811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:53,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:53,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:41:53,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875169513] [2022-02-24 01:41:53,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:53,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:41:53,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:53,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:41:53,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:41:53,570 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:54,409 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:41:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:41:54,409 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:41:54,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:54,409 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:41:54,409 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:41:54,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:41:54,410 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:54,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:41:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 167. [2022-02-24 01:41:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-24 01:41:54,630 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 62 [2022-02-24 01:41:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:54,630 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-24 01:41:54,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-24 01:41:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:41:54,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:54,630 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:54,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2022-02-24 01:41:54,631 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:54,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1818017894, now seen corresponding path program 303 times [2022-02-24 01:41:54,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:54,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807851941] [2022-02-24 01:41:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:54,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:54,633 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:54,633 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:54,633 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:54,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:54,941 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:54,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807851941] [2022-02-24 01:41:54,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [807851941] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:54,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:54,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:41:54,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218509808] [2022-02-24 01:41:54,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:54,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:41:54,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:54,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:41:54,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:41:54,942 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:55,802 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:41:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:41:55,803 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:41:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:55,803 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:41:55,803 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:41:55,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:41:55,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:55,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:41:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2022-02-24 01:41:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-24 01:41:56,030 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 62 [2022-02-24 01:41:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:56,030 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-24 01:41:56,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-24 01:41:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:41:56,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:56,030 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:56,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2022-02-24 01:41:56,030 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1124960230, now seen corresponding path program 304 times [2022-02-24 01:41:56,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:56,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585956679] [2022-02-24 01:41:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:56,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:56,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:56,032 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:56,033 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:56,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:56,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585956679] [2022-02-24 01:41:56,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585956679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:56,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:56,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:41:56,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665918285] [2022-02-24 01:41:56,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:56,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:41:56,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:41:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:41:56,338 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:57,198 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:41:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:41:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:41:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:57,199 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:41:57,199 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:41:57,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:41:57,199 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:57,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 27 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:41:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2022-02-24 01:41:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-24 01:41:57,422 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 62 [2022-02-24 01:41:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:57,422 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-24 01:41:57,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-24 01:41:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:41:57,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:57,422 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:57,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2022-02-24 01:41:57,423 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash 816476006, now seen corresponding path program 305 times [2022-02-24 01:41:57,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:57,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276241756] [2022-02-24 01:41:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:57,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:57,424 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:57,424 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:57,424 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:57,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:57,729 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:57,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276241756] [2022-02-24 01:41:57,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [276241756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:57,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:57,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:41:57,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959257229] [2022-02-24 01:41:57,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:57,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:41:57,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:41:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:41:57,730 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:41:58,589 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:41:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:41:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:41:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:41:58,589 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:41:58,589 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:41:58,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:41:58,590 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:41:58,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:41:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:41:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2022-02-24 01:41:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-24 01:41:58,861 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 62 [2022-02-24 01:41:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:41:58,861 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-24 01:41:58,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:41:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-24 01:41:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:41:58,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:41:58,862 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:41:58,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2022-02-24 01:41:58,862 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:41:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:41:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash 715880166, now seen corresponding path program 306 times [2022-02-24 01:41:58,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:41:58,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830971551] [2022-02-24 01:41:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:41:58,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:41:58,863 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:41:58,863 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:41:58,864 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:41:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:59,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:41:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:41:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:41:59,169 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:41:59,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830971551] [2022-02-24 01:41:59,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [830971551] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:41:59,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:41:59,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:41:59,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730772575] [2022-02-24 01:41:59,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:41:59,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:41:59,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:41:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:41:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:41:59,170 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:00,066 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:42:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:00,067 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:00,067 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:42:00,067 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:42:00,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:00,068 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:00,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:42:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 175. [2022-02-24 01:42:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-24 01:42:00,304 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 62 [2022-02-24 01:42:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:00,304 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-24 01:42:00,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-24 01:42:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:00,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:00,305 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:00,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308 [2022-02-24 01:42:00,305 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1467441562, now seen corresponding path program 307 times [2022-02-24 01:42:00,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:00,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820837839] [2022-02-24 01:42:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:00,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:00,306 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:00,307 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:00,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:00,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:00,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820837839] [2022-02-24 01:42:00,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820837839] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:00,613 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:00,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:00,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21901706] [2022-02-24 01:42:00,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:00,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:00,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:00,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:00,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:00,613 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:01,503 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:42:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:01,504 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:42:01,504 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:42:01,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:01,504 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:01,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:42:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 177. [2022-02-24 01:42:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-24 01:42:01,744 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 62 [2022-02-24 01:42:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:01,744 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-24 01:42:01,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-24 01:42:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:01,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:01,745 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:01,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309 [2022-02-24 01:42:01,745 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:01,745 INFO L85 PathProgramCache]: Analyzing trace with hash 599385574, now seen corresponding path program 308 times [2022-02-24 01:42:01,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:01,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566456251] [2022-02-24 01:42:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:01,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:01,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:01,747 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:01,747 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:02,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:02,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:02,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566456251] [2022-02-24 01:42:02,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566456251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:02,056 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:02,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:02,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517305918] [2022-02-24 01:42:02,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:02,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:02,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:02,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:02,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:02,056 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:02,961 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:42:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:02,961 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:02,962 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:42:02,962 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:42:02,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:02,962 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:02,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:42:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 179. [2022-02-24 01:42:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-24 01:42:03,214 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 62 [2022-02-24 01:42:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:03,214 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-24 01:42:03,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:03,214 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-24 01:42:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:03,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:03,215 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:03,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2022-02-24 01:42:03,215 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:03,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:03,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1749594778, now seen corresponding path program 309 times [2022-02-24 01:42:03,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:03,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238633504] [2022-02-24 01:42:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:03,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:03,216 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:03,217 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:03,217 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:03,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:03,523 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:03,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238633504] [2022-02-24 01:42:03,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [238633504] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:03,523 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:03,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:03,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160126088] [2022-02-24 01:42:03,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:03,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:03,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:03,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:03,524 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:04,439 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:42:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:04,440 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:04,440 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:42:04,440 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:42:04,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:04,441 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:04,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:04,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:42:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 181. [2022-02-24 01:42:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-24 01:42:04,694 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 62 [2022-02-24 01:42:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:04,694 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-24 01:42:04,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-24 01:42:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:04,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:04,695 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:04,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311 [2022-02-24 01:42:04,695 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:04,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:04,695 INFO L85 PathProgramCache]: Analyzing trace with hash 33084646, now seen corresponding path program 310 times [2022-02-24 01:42:04,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:04,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140609805] [2022-02-24 01:42:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:04,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:04,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:04,696 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:04,697 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:04,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:05,001 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:05,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140609805] [2022-02-24 01:42:05,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140609805] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:05,001 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:05,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:05,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241266971] [2022-02-24 01:42:05,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:05,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:05,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:05,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:05,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:05,002 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:05,958 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:42:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:05,959 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:05,959 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:42:05,959 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:42:05,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:05,959 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:05,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:42:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 183. [2022-02-24 01:42:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-24 01:42:06,228 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 62 [2022-02-24 01:42:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:06,228 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-24 01:42:06,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-24 01:42:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:06,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:06,229 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:06,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312 [2022-02-24 01:42:06,229 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:06,229 INFO L85 PathProgramCache]: Analyzing trace with hash -503939994, now seen corresponding path program 311 times [2022-02-24 01:42:06,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:06,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617784150] [2022-02-24 01:42:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:06,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:06,230 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:06,230 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:06,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:06,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:06,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617784150] [2022-02-24 01:42:06,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617784150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:06,534 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:06,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:06,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788538518] [2022-02-24 01:42:06,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:06,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:06,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:06,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:06,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:06,534 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:07,477 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:42:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:07,477 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:42:07,477 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:42:07,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:07,478 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:07,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:42:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 185. [2022-02-24 01:42:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-24 01:42:07,740 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 62 [2022-02-24 01:42:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:07,740 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-24 01:42:07,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-24 01:42:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:07,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:07,741 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:07,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2022-02-24 01:42:07,741 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:07,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1188543514, now seen corresponding path program 312 times [2022-02-24 01:42:07,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:07,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557444926] [2022-02-24 01:42:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:07,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:07,742 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:07,743 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:07,743 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:08,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:08,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:08,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557444926] [2022-02-24 01:42:08,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [557444926] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:08,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:08,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:08,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547249662] [2022-02-24 01:42:08,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:08,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:08,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:08,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:08,050 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:09,014 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:42:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:09,015 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:09,015 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:42:09,015 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:42:09,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:09,015 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:09,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:42:09,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 187. [2022-02-24 01:42:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-24 01:42:09,286 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 62 [2022-02-24 01:42:09,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:09,286 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-24 01:42:09,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-24 01:42:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:09,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:09,286 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:09,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2022-02-24 01:42:09,286 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:09,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1962529946, now seen corresponding path program 313 times [2022-02-24 01:42:09,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:09,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410830778] [2022-02-24 01:42:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:09,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:09,288 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:09,288 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:09,288 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:09,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:09,593 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:09,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410830778] [2022-02-24 01:42:09,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [410830778] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:09,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:09,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:09,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225968141] [2022-02-24 01:42:09,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:09,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:09,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:09,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:09,594 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:10,569 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:42:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:10,569 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:42:10,569 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:42:10,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:10,570 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:10,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:42:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 189. [2022-02-24 01:42:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-24 01:42:10,842 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 62 [2022-02-24 01:42:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:10,842 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-24 01:42:10,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-24 01:42:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:10,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:10,843 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:10,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315 [2022-02-24 01:42:10,843 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1560818406, now seen corresponding path program 314 times [2022-02-24 01:42:10,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:10,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966082918] [2022-02-24 01:42:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:10,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:10,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:10,844 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:10,844 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:11,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:11,154 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:11,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966082918] [2022-02-24 01:42:11,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966082918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:11,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:11,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:11,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199577226] [2022-02-24 01:42:11,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:11,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:11,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:11,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:11,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:11,155 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:12,145 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:42:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:12,145 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:12,145 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:42:12,145 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:42:12,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:12,146 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:12,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:42:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 191. [2022-02-24 01:42:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-24 01:42:12,428 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 62 [2022-02-24 01:42:12,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:12,428 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-24 01:42:12,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-24 01:42:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:12,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:12,428 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:12,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2022-02-24 01:42:12,429 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:12,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1230611866, now seen corresponding path program 315 times [2022-02-24 01:42:12,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:12,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498989613] [2022-02-24 01:42:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:12,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:12,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:12,430 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:12,430 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:12,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:12,736 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:12,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498989613] [2022-02-24 01:42:12,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498989613] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:12,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:12,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:12,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833149300] [2022-02-24 01:42:12,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:12,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:12,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:12,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:12,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:12,737 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:13,734 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:42:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:13,734 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:42:13,734 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:42:13,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:13,735 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:13,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:42:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 193. [2022-02-24 01:42:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-24 01:42:14,023 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 62 [2022-02-24 01:42:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:14,023 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-24 01:42:14,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-24 01:42:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:14,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:14,023 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:14,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2022-02-24 01:42:14,023 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 559456742, now seen corresponding path program 316 times [2022-02-24 01:42:14,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:14,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107109197] [2022-02-24 01:42:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:14,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:14,025 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:14,025 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:14,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:14,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:14,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107109197] [2022-02-24 01:42:14,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2107109197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:14,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:14,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:14,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991118457] [2022-02-24 01:42:14,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:14,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:14,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:14,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:14,330 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:15,348 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:42:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:15,348 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:15,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:15,349 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:42:15,349 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:42:15,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:15,349 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:15,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:15,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:42:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 195. [2022-02-24 01:42:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-24 01:42:15,644 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 62 [2022-02-24 01:42:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:15,644 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-24 01:42:15,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-24 01:42:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:15,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:15,645 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:15,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2022-02-24 01:42:15,645 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:15,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1466496666, now seen corresponding path program 317 times [2022-02-24 01:42:15,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:15,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630884361] [2022-02-24 01:42:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:15,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:15,647 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:15,647 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:15,647 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:15,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:15,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:15,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630884361] [2022-02-24 01:42:15,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630884361] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:15,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:15,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:15,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278055942] [2022-02-24 01:42:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:15,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:15,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:15,951 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:16,991 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:42:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:16,991 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:42:16,991 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:42:16,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:16,992 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:16,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:42:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 197. [2022-02-24 01:42:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-24 01:42:17,304 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 62 [2022-02-24 01:42:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:17,305 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-24 01:42:17,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-24 01:42:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:17,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:17,305 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:17,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2022-02-24 01:42:17,305 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1507430630, now seen corresponding path program 318 times [2022-02-24 01:42:17,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:17,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851041589] [2022-02-24 01:42:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:17,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:17,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:17,307 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:17,307 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:17,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:17,616 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:17,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851041589] [2022-02-24 01:42:17,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [851041589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:17,616 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:17,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:17,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082051024] [2022-02-24 01:42:17,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:17,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:17,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:17,617 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:18,657 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:42:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:18,657 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:18,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:18,658 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:42:18,658 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:42:18,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:18,658 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:18,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:42:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 199. [2022-02-24 01:42:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-24 01:42:18,959 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 62 [2022-02-24 01:42:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:18,959 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-24 01:42:18,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-24 01:42:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:18,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:18,960 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:18,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320 [2022-02-24 01:42:18,960 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:18,960 INFO L85 PathProgramCache]: Analyzing trace with hash -996657050, now seen corresponding path program 319 times [2022-02-24 01:42:18,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:18,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951748400] [2022-02-24 01:42:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:18,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:18,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:18,962 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:18,962 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:19,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:19,267 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:19,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951748400] [2022-02-24 01:42:19,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951748400] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:19,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:19,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:19,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997369454] [2022-02-24 01:42:19,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:19,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:19,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:19,267 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:20,313 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:42:20,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:20,313 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:20,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:20,314 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:42:20,314 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:42:20,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:20,314 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:20,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:42:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 201. [2022-02-24 01:42:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-24 01:42:20,622 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 62 [2022-02-24 01:42:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:20,622 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-24 01:42:20,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-24 01:42:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:20,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:20,622 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:20,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2022-02-24 01:42:20,622 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2051735526, now seen corresponding path program 320 times [2022-02-24 01:42:20,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:20,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697497685] [2022-02-24 01:42:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:20,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:20,624 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:20,624 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:20,624 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:20,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:20,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:20,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697497685] [2022-02-24 01:42:20,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [697497685] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:20,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:20,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:20,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029032666] [2022-02-24 01:42:20,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:20,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:20,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:20,929 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:21,995 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-24 01:42:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:21,995 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:42:21,995 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:42:21,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:21,996 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:21,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:42:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 203. [2022-02-24 01:42:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-24 01:42:22,297 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 62 [2022-02-24 01:42:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:22,297 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-24 01:42:22,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-24 01:42:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:22,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:22,297 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:22,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322 [2022-02-24 01:42:22,297 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1905662106, now seen corresponding path program 321 times [2022-02-24 01:42:22,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:22,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808517018] [2022-02-24 01:42:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:22,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:22,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:22,299 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:22,299 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:22,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:22,608 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:22,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808517018] [2022-02-24 01:42:22,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808517018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:22,608 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:22,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:22,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305159635] [2022-02-24 01:42:22,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:22,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:22,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:22,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:22,609 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:23,674 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-24 01:42:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:23,675 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:42:23,675 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:42:23,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:23,675 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:23,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:42:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 205. [2022-02-24 01:42:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-24 01:42:23,992 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 62 [2022-02-24 01:42:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:23,992 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-24 01:42:23,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-24 01:42:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:23,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:23,993 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:23,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2022-02-24 01:42:23,993 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:23,993 INFO L85 PathProgramCache]: Analyzing trace with hash 376237798, now seen corresponding path program 322 times [2022-02-24 01:42:23,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:23,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263977146] [2022-02-24 01:42:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:23,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:23,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:23,994 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:23,995 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:24,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:24,299 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:24,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263977146] [2022-02-24 01:42:24,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [263977146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:24,299 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:24,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:24,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996943725] [2022-02-24 01:42:24,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:24,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:24,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:24,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:24,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:24,300 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:25,361 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-24 01:42:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:25,362 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:42:25,362 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 01:42:25,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:25,362 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:25,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 01:42:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 207. [2022-02-24 01:42:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-24 01:42:25,676 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 62 [2022-02-24 01:42:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:25,676 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-24 01:42:25,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-24 01:42:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:25,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:25,677 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:25,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324 [2022-02-24 01:42:25,677 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:25,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1446242714, now seen corresponding path program 323 times [2022-02-24 01:42:25,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:25,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695931062] [2022-02-24 01:42:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:25,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:25,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:25,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:25,678 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:25,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:25,983 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:25,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695931062] [2022-02-24 01:42:25,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [695931062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:25,983 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:25,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:25,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547362564] [2022-02-24 01:42:25,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:25,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:25,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:25,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:25,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:25,984 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:27,051 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-24 01:42:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:27,051 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:27,052 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:42:27,052 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:42:27,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:27,052 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:27,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:42:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 209. [2022-02-24 01:42:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-24 01:42:27,360 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 62 [2022-02-24 01:42:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:27,361 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-24 01:42:27,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:27,361 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-24 01:42:27,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:42:27,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:27,361 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:27,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325 [2022-02-24 01:42:27,361 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash -503357978, now seen corresponding path program 324 times [2022-02-24 01:42:27,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:27,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397386234] [2022-02-24 01:42:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:27,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:27,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:27,364 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:27,364 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:27,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:27,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:27,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397386234] [2022-02-24 01:42:27,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [397386234] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:27,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:27,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:42:27,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710019214] [2022-02-24 01:42:27,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:27,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:42:27,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:42:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:42:27,744 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:28,737 INFO L93 Difference]: Finished difference Result 264 states and 386 transitions. [2022-02-24 01:42:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:42:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:42:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:28,738 INFO L225 Difference]: With dead ends: 264 [2022-02-24 01:42:28,738 INFO L226 Difference]: Without dead ends: 258 [2022-02-24 01:42:28,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:42:28,738 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:28,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-24 01:42:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2022-02-24 01:42:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-24 01:42:28,956 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 62 [2022-02-24 01:42:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:28,956 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-24 01:42:28,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-24 01:42:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:28,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:28,956 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:28,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326 [2022-02-24 01:42:28,956 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1532737079, now seen corresponding path program 325 times [2022-02-24 01:42:28,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:28,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659491790] [2022-02-24 01:42:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:28,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:28,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:28,958 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:28,958 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:29,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:29,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:29,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659491790] [2022-02-24 01:42:29,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [659491790] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:29,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:29,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:29,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864791497] [2022-02-24 01:42:29,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:29,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:29,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:29,284 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:30,134 INFO L93 Difference]: Finished difference Result 178 states and 258 transitions. [2022-02-24 01:42:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:30,135 INFO L225 Difference]: With dead ends: 178 [2022-02-24 01:42:30,135 INFO L226 Difference]: Without dead ends: 172 [2022-02-24 01:42:30,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:30,135 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:30,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 17 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-24 01:42:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2022-02-24 01:42:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-24 01:42:30,354 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 64 [2022-02-24 01:42:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:30,354 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-24 01:42:30,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-24 01:42:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:30,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:30,355 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:30,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327 [2022-02-24 01:42:30,355 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:30,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1667281225, now seen corresponding path program 326 times [2022-02-24 01:42:30,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:30,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816646867] [2022-02-24 01:42:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:30,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:30,356 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:30,357 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:30,357 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:30,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:30,680 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:30,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816646867] [2022-02-24 01:42:30,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [816646867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:30,680 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:30,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:30,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331948309] [2022-02-24 01:42:30,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:30,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:30,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:30,681 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:31,535 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-24 01:42:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:31,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:31,535 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:42:31,535 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:42:31,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:31,536 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:31,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:42:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2022-02-24 01:42:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-24 01:42:31,772 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 64 [2022-02-24 01:42:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:31,772 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-24 01:42:31,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-24 01:42:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:31,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:31,772 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:31,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328 [2022-02-24 01:42:31,772 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1688287433, now seen corresponding path program 327 times [2022-02-24 01:42:31,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:31,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777531713] [2022-02-24 01:42:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:31,774 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:31,774 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:31,774 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:32,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:32,105 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:32,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777531713] [2022-02-24 01:42:32,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [777531713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:32,105 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:32,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:32,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133083522] [2022-02-24 01:42:32,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:32,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:32,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:32,106 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:32,993 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:42:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:32,994 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:42:32,994 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:42:32,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:32,994 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:32,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:42:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2022-02-24 01:42:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-24 01:42:33,233 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 64 [2022-02-24 01:42:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:33,233 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-24 01:42:33,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-24 01:42:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:33,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:33,233 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:33,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329 [2022-02-24 01:42:33,234 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash 400416841, now seen corresponding path program 328 times [2022-02-24 01:42:33,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:33,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400815101] [2022-02-24 01:42:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:33,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:33,235 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:33,235 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:33,235 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:33,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:33,558 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:33,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400815101] [2022-02-24 01:42:33,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400815101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:33,558 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:33,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:33,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32406670] [2022-02-24 01:42:33,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:33,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:33,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:33,559 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:34,438 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:42:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:34,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:34,439 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:42:34,439 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:42:34,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:34,439 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:34,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:34,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:42:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 175. [2022-02-24 01:42:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-24 01:42:34,686 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 64 [2022-02-24 01:42:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:34,686 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-24 01:42:34,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-24 01:42:34,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:34,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:34,686 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:34,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330 [2022-02-24 01:42:34,686 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:34,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:34,686 INFO L85 PathProgramCache]: Analyzing trace with hash -292640823, now seen corresponding path program 329 times [2022-02-24 01:42:34,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:34,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697301022] [2022-02-24 01:42:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:34,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:34,688 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:34,688 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:34,688 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:35,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:35,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:35,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697301022] [2022-02-24 01:42:35,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [697301022] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:35,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:35,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:35,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854105503] [2022-02-24 01:42:35,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:35,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:35,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:35,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:35,011 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:35,927 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:42:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:35,928 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:35,928 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:42:35,928 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:42:35,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:35,928 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:35,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:42:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2022-02-24 01:42:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-24 01:42:36,193 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 64 [2022-02-24 01:42:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:36,193 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-24 01:42:36,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-24 01:42:36,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:36,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:36,193 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:36,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331 [2022-02-24 01:42:36,193 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:36,194 INFO L85 PathProgramCache]: Analyzing trace with hash -601125047, now seen corresponding path program 330 times [2022-02-24 01:42:36,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:36,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506054098] [2022-02-24 01:42:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:36,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:36,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:36,195 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:36,195 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:36,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:36,529 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:36,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506054098] [2022-02-24 01:42:36,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506054098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:36,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:36,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:36,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138477471] [2022-02-24 01:42:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:36,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:36,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:36,530 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:37,494 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:42:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:37,495 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:42:37,495 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:42:37,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:37,495 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:37,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:42:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 179. [2022-02-24 01:42:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-24 01:42:37,768 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 64 [2022-02-24 01:42:37,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:37,768 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-24 01:42:37,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-24 01:42:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:37,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:37,768 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:37,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332 [2022-02-24 01:42:37,768 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:37,769 INFO L85 PathProgramCache]: Analyzing trace with hash -701720887, now seen corresponding path program 331 times [2022-02-24 01:42:37,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:37,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397858974] [2022-02-24 01:42:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:37,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:37,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:37,770 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:37,770 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:38,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:38,106 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:38,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397858974] [2022-02-24 01:42:38,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397858974] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:38,106 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:38,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:38,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663848510] [2022-02-24 01:42:38,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:38,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:38,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:38,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:38,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:38,107 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:39,082 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:42:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:39,082 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:39,083 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:42:39,083 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:42:39,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:39,083 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:39,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:42:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 181. [2022-02-24 01:42:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-24 01:42:39,362 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 64 [2022-02-24 01:42:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:39,362 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-24 01:42:39,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-24 01:42:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:39,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:39,363 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:39,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2022-02-24 01:42:39,363 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1409924681, now seen corresponding path program 332 times [2022-02-24 01:42:39,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:39,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878051902] [2022-02-24 01:42:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:39,365 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:39,365 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:39,365 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:39,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:39,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:39,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878051902] [2022-02-24 01:42:39,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878051902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:39,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:39,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:39,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849824823] [2022-02-24 01:42:39,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:39,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:39,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:39,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:39,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:39,696 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:40,680 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:42:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:40,680 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:40,681 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:42:40,681 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:42:40,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:40,681 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:40,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:42:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 183. [2022-02-24 01:42:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-24 01:42:40,966 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 64 [2022-02-24 01:42:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:40,966 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-24 01:42:40,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-24 01:42:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:40,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:40,967 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:40,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2022-02-24 01:42:40,967 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:40,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash -818215479, now seen corresponding path program 333 times [2022-02-24 01:42:40,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:40,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688580234] [2022-02-24 01:42:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:40,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:40,968 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:40,969 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:40,969 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:41,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:41,305 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:41,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688580234] [2022-02-24 01:42:41,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [688580234] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:41,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:41,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:41,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98484198] [2022-02-24 01:42:41,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:41,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:41,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:41,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:41,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:41,306 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:42,321 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:42:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:42,322 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:42:42,322 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:42:42,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:42,322 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:42,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:42:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2022-02-24 01:42:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-24 01:42:42,630 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 64 [2022-02-24 01:42:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:42,630 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-24 01:42:42,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-24 01:42:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:42,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:42,630 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:42,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335 [2022-02-24 01:42:42,630 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:42,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1127771465, now seen corresponding path program 334 times [2022-02-24 01:42:42,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:42,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428300216] [2022-02-24 01:42:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:42,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:42,632 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:42,632 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:42,632 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:42,961 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:42,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428300216] [2022-02-24 01:42:42,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [428300216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:42,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:42,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:42,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154062938] [2022-02-24 01:42:42,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:42,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:42,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:42,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:42,962 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:43,970 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:42:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:43,970 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:43,971 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:42:43,971 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:42:43,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:43,971 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:43,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:43,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:42:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 187. [2022-02-24 01:42:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-24 01:42:44,246 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 64 [2022-02-24 01:42:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:44,246 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-24 01:42:44,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-24 01:42:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:44,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:44,246 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:44,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2022-02-24 01:42:44,246 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1384516407, now seen corresponding path program 335 times [2022-02-24 01:42:44,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:44,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636113294] [2022-02-24 01:42:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:44,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:44,248 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:44,248 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:44,248 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:44,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:44,587 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:44,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636113294] [2022-02-24 01:42:44,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [636113294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:44,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:44,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:44,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966666086] [2022-02-24 01:42:44,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:44,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:44,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:44,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:44,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:44,588 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:45,596 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:42:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:45,596 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:42:45,596 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:42:45,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:45,597 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:45,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:42:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 189. [2022-02-24 01:42:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-24 01:42:45,886 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 64 [2022-02-24 01:42:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:45,886 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-24 01:42:45,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-24 01:42:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:45,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:45,887 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:45,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337 [2022-02-24 01:42:45,887 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1921541047, now seen corresponding path program 336 times [2022-02-24 01:42:45,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:45,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363663868] [2022-02-24 01:42:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:45,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:45,888 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:45,888 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:45,888 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:46,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:46,212 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:46,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363663868] [2022-02-24 01:42:46,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [363663868] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:46,212 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:46,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:46,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074325831] [2022-02-24 01:42:46,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:46,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:46,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:46,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:46,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:46,216 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:47,229 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:42:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:47,229 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:47,229 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:42:47,229 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:42:47,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:47,230 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:47,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:47,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:42:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 191. [2022-02-24 01:42:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-24 01:42:47,523 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 64 [2022-02-24 01:42:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:47,523 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-24 01:42:47,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-24 01:42:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:47,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:47,523 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:47,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338 [2022-02-24 01:42:47,524 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1688822729, now seen corresponding path program 337 times [2022-02-24 01:42:47,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:47,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164312815] [2022-02-24 01:42:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:47,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:47,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:47,525 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:47,525 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:47,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:47,847 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:47,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164312815] [2022-02-24 01:42:47,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [164312815] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:47,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:47,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:47,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734553699] [2022-02-24 01:42:47,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:47,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:47,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:47,848 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:48,876 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:42:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:48,877 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:42:48,877 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:42:48,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:48,878 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:48,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:42:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 193. [2022-02-24 01:42:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-24 01:42:49,171 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 64 [2022-02-24 01:42:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:49,171 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-24 01:42:49,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-24 01:42:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:49,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:49,171 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:49,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2022-02-24 01:42:49,171 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash 914836297, now seen corresponding path program 338 times [2022-02-24 01:42:49,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:49,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182425510] [2022-02-24 01:42:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:49,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:49,173 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:49,173 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:49,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:49,498 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:49,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182425510] [2022-02-24 01:42:49,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [182425510] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:49,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:49,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:49,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754756885] [2022-02-24 01:42:49,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:49,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:49,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:49,499 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:50,549 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:42:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:50,550 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:42:50,550 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:42:50,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:50,550 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:50,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 17 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:42:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 195. [2022-02-24 01:42:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-24 01:42:50,848 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 64 [2022-02-24 01:42:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:50,848 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-24 01:42:50,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-24 01:42:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:50,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:50,848 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:50,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340 [2022-02-24 01:42:50,849 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash 143217353, now seen corresponding path program 339 times [2022-02-24 01:42:50,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:50,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903204337] [2022-02-24 01:42:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:50,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:50,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:50,851 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:50,851 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:51,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:51,179 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:51,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903204337] [2022-02-24 01:42:51,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [903204337] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:51,180 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:51,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:51,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444363153] [2022-02-24 01:42:51,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:51,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:51,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:51,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:51,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:51,180 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:52,248 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:42:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:52,249 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:52,249 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:42:52,249 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:42:52,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:52,250 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:52,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 27 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:42:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 197. [2022-02-24 01:42:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-24 01:42:52,594 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 64 [2022-02-24 01:42:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:52,595 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-24 01:42:52,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-24 01:42:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:52,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:52,595 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:52,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341 [2022-02-24 01:42:52,595 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:52,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:52,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1646754377, now seen corresponding path program 340 times [2022-02-24 01:42:52,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:52,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307139558] [2022-02-24 01:42:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:52,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:52,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:52,597 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:52,597 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:52,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:52,920 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:52,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307139558] [2022-02-24 01:42:52,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307139558] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:52,920 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:52,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:52,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063526167] [2022-02-24 01:42:52,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:52,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:52,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:52,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:52,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:52,921 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:53,984 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:42:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:53,985 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:42:53,985 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:42:53,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:53,985 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:53,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 15 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:42:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 199. [2022-02-24 01:42:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:54,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-24 01:42:54,299 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 64 [2022-02-24 01:42:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:54,299 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-24 01:42:54,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-24 01:42:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:54,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:54,299 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:54,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342 [2022-02-24 01:42:54,299 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -858144311, now seen corresponding path program 341 times [2022-02-24 01:42:54,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:54,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735420604] [2022-02-24 01:42:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:54,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:54,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:54,301 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:54,301 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:54,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:54,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:54,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735420604] [2022-02-24 01:42:54,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [735420604] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:54,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:54,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:54,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659743454] [2022-02-24 01:42:54,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:54,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:54,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:54,625 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:55,717 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:42:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:55,718 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:42:55,718 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:42:55,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:55,719 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:55,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 17 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:42:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 201. [2022-02-24 01:42:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-24 01:42:56,039 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 64 [2022-02-24 01:42:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:56,039 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-24 01:42:56,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-24 01:42:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:56,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:56,039 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:56,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343 [2022-02-24 01:42:56,039 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:56,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1410869577, now seen corresponding path program 342 times [2022-02-24 01:42:56,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:56,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482998890] [2022-02-24 01:42:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:56,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:56,041 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:56,041 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:56,041 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:56,362 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:56,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482998890] [2022-02-24 01:42:56,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [482998890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:56,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:56,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:56,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615690564] [2022-02-24 01:42:56,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:56,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:56,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:56,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:56,363 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:57,468 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:42:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:57,469 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:42:57,469 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:42:57,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:57,470 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:57,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 27 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:42:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 203. [2022-02-24 01:42:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-24 01:42:57,794 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 64 [2022-02-24 01:42:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:57,794 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-24 01:42:57,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-24 01:42:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:57,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:57,794 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:57,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2022-02-24 01:42:57,794 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:57,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:57,795 INFO L85 PathProgramCache]: Analyzing trace with hash 89829577, now seen corresponding path program 343 times [2022-02-24 01:42:57,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:57,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69833405] [2022-02-24 01:42:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:57,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:57,796 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:57,796 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:57,796 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:58,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:58,118 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:58,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69833405] [2022-02-24 01:42:58,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [69833405] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:58,118 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:58,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:58,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135425503] [2022-02-24 01:42:58,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:58,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:58,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:58,119 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:42:59,225 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:42:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:42:59,226 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:42:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:42:59,226 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:42:59,226 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:42:59,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:42:59,227 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:42:59,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 17 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:42:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:42:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 205. [2022-02-24 01:42:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-24 01:42:59,552 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 64 [2022-02-24 01:42:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:42:59,552 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-24 01:42:59,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:42:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-24 01:42:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:42:59,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:42:59,553 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:42:59,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345 [2022-02-24 01:42:59,553 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:42:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:42:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1880709193, now seen corresponding path program 344 times [2022-02-24 01:42:59,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:42:59,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377723049] [2022-02-24 01:42:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:42:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:42:59,554 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:42:59,554 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:42:59,554 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:42:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:59,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:42:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:42:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:42:59,877 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:42:59,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377723049] [2022-02-24 01:42:59,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377723049] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:42:59,877 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:42:59,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:42:59,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181389962] [2022-02-24 01:42:59,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:42:59,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:42:59,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:42:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:42:59,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:42:59,878 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:01,008 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-24 01:43:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:43:01,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:43:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:01,009 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:43:01,009 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:43:01,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:43:01,009 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:01,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:43:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 207. [2022-02-24 01:43:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-24 01:43:01,345 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 64 [2022-02-24 01:43:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:01,345 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-24 01:43:01,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-24 01:43:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:43:01,346 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:01,346 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:01,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346 [2022-02-24 01:43:01,346 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash 634134473, now seen corresponding path program 345 times [2022-02-24 01:43:01,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:01,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946225341] [2022-02-24 01:43:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:01,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:01,348 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:01,348 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:01,348 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:01,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:01,671 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:01,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946225341] [2022-02-24 01:43:01,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [946225341] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:01,671 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:01,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:43:01,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211987173] [2022-02-24 01:43:01,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:01,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:43:01,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:01,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:43:01,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:43:01,672 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:02,823 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-24 01:43:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:43:02,823 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:43:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:02,823 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:43:02,823 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:43:02,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:43:02,824 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:02,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:43:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 209. [2022-02-24 01:43:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-24 01:43:03,164 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 64 [2022-02-24 01:43:03,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:03,164 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-24 01:43:03,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-24 01:43:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:43:03,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:03,165 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:03,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2022-02-24 01:43:03,165 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash 971704137, now seen corresponding path program 346 times [2022-02-24 01:43:03,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:03,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430967727] [2022-02-24 01:43:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:03,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:03,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:03,167 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:03,167 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:03,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:03,488 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:03,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430967727] [2022-02-24 01:43:03,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430967727] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:03,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:03,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:43:03,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983413660] [2022-02-24 01:43:03,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:03,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:43:03,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:43:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:43:03,489 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:04,646 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-24 01:43:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:43:04,646 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:43:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:04,646 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:43:04,646 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 01:43:04,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:43:04,647 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:04,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 01:43:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 211. [2022-02-24 01:43:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-24 01:43:04,988 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 64 [2022-02-24 01:43:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:04,988 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-24 01:43:04,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-24 01:43:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:43:04,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:04,988 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:04,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348 [2022-02-24 01:43:04,988 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:04,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1041363255, now seen corresponding path program 347 times [2022-02-24 01:43:04,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:04,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720892282] [2022-02-24 01:43:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:04,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:04,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:04,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:04,990 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:05,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:05,312 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:05,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720892282] [2022-02-24 01:43:05,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720892282] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:05,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:05,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:43:05,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013100565] [2022-02-24 01:43:05,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:05,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:43:05,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:43:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:43:05,313 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:06,468 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-24 01:43:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:43:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:43:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:06,469 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:43:06,469 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:43:06,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:43:06,469 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:06,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:43:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 213. [2022-02-24 01:43:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-24 01:43:06,817 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 64 [2022-02-24 01:43:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:06,817 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-24 01:43:06,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-24 01:43:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:43:06,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:06,817 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:06,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349 [2022-02-24 01:43:06,817 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1431123529, now seen corresponding path program 348 times [2022-02-24 01:43:06,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:06,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038709165] [2022-02-24 01:43:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:06,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:06,819 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:06,819 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:06,819 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:07,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:07,145 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:07,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038709165] [2022-02-24 01:43:07,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2038709165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:07,146 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:07,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:43:07,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981176743] [2022-02-24 01:43:07,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:07,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:43:07,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:07,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:43:07,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:43:07,146 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:08,307 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-24 01:43:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:43:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:43:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:08,308 INFO L225 Difference]: With dead ends: 314 [2022-02-24 01:43:08,308 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:43:08,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:43:08,309 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:08,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:43:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 215. [2022-02-24 01:43:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-24 01:43:08,656 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 64 [2022-02-24 01:43:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:08,657 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-24 01:43:08,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-24 01:43:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:43:08,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:08,657 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:08,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350 [2022-02-24 01:43:08,657 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1920959031, now seen corresponding path program 349 times [2022-02-24 01:43:08,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:08,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991807706] [2022-02-24 01:43:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:08,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:08,659 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:08,659 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:08,659 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:08,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:08,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:08,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991807706] [2022-02-24 01:43:08,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [991807706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:08,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:08,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:43:08,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832633708] [2022-02-24 01:43:08,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:08,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:43:08,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:43:08,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:43:08,981 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:10,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:10,143 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-24 01:43:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:43:10,143 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:43:10,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:10,143 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:43:10,143 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 01:43:10,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:43:10,144 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:10,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 01:43:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 217. [2022-02-24 01:43:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-24 01:43:10,491 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 64 [2022-02-24 01:43:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:10,491 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-24 01:43:10,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-24 01:43:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:43:10,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:10,491 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:10,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351 [2022-02-24 01:43:10,491 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2046827191, now seen corresponding path program 350 times [2022-02-24 01:43:10,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:10,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084803472] [2022-02-24 01:43:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:10,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:10,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:10,493 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:10,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:10,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:10,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084803472] [2022-02-24 01:43:10,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2084803472] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:10,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:10,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:43:10,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958075298] [2022-02-24 01:43:10,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:10,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:43:10,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:10,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:43:10,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:43:10,812 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:11,886 INFO L93 Difference]: Finished difference Result 274 states and 401 transitions. [2022-02-24 01:43:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:43:11,886 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:43:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:11,886 INFO L225 Difference]: With dead ends: 274 [2022-02-24 01:43:11,886 INFO L226 Difference]: Without dead ends: 268 [2022-02-24 01:43:11,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:43:11,887 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:11,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-02-24 01:43:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 169. [2022-02-24 01:43:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-24 01:43:12,123 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 64 [2022-02-24 01:43:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:12,123 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-24 01:43:12,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-24 01:43:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:12,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:12,124 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:12,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2022-02-24 01:43:12,124 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1952251116, now seen corresponding path program 351 times [2022-02-24 01:43:12,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:12,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695218122] [2022-02-24 01:43:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:12,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:12,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:12,125 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:12,125 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:12,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:12,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:12,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695218122] [2022-02-24 01:43:12,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1695218122] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:12,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:12,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:12,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869813505] [2022-02-24 01:43:12,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:12,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:12,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:12,468 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:13,377 INFO L93 Difference]: Finished difference Result 184 states and 267 transitions. [2022-02-24 01:43:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:13,377 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:13,377 INFO L225 Difference]: With dead ends: 184 [2022-02-24 01:43:13,377 INFO L226 Difference]: Without dead ends: 178 [2022-02-24 01:43:13,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:13,378 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:13,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 19 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-24 01:43:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2022-02-24 01:43:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-24 01:43:13,624 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 66 [2022-02-24 01:43:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:13,624 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-24 01:43:13,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-24 01:43:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:13,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:13,624 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:13,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353 [2022-02-24 01:43:13,625 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:13,625 INFO L85 PathProgramCache]: Analyzing trace with hash 857302124, now seen corresponding path program 352 times [2022-02-24 01:43:13,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:13,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721271134] [2022-02-24 01:43:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:13,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:13,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:13,627 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:13,627 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:13,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:13,975 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:13,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721271134] [2022-02-24 01:43:13,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1721271134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:13,975 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:13,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:13,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259745986] [2022-02-24 01:43:13,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:13,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:13,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:13,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:13,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:13,976 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:14,873 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-24 01:43:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:14,874 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:43:14,874 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:43:14,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:14,874 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:14,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:43:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2022-02-24 01:43:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-24 01:43:15,133 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 66 [2022-02-24 01:43:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:15,133 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-24 01:43:15,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:15,133 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-24 01:43:15,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:15,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:15,133 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:15,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354 [2022-02-24 01:43:15,133 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash 878308332, now seen corresponding path program 353 times [2022-02-24 01:43:15,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:15,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647942212] [2022-02-24 01:43:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:15,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:15,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:15,135 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:15,135 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:15,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:15,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:15,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647942212] [2022-02-24 01:43:15,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647942212] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:15,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:15,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:15,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912839924] [2022-02-24 01:43:15,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:15,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:15,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:15,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:15,490 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:16,423 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:43:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:16,423 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:16,423 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:43:16,423 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:43:16,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:16,424 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:16,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:43:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-02-24 01:43:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-24 01:43:16,695 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 66 [2022-02-24 01:43:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:16,695 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-24 01:43:16,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-24 01:43:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:16,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:16,695 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:16,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355 [2022-02-24 01:43:16,695 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:16,695 INFO L85 PathProgramCache]: Analyzing trace with hash -409562260, now seen corresponding path program 354 times [2022-02-24 01:43:16,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:16,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522577136] [2022-02-24 01:43:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:16,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:16,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:16,697 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:16,697 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:17,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:17,038 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:17,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522577136] [2022-02-24 01:43:17,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [522577136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:17,038 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:17,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:17,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125156132] [2022-02-24 01:43:17,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:17,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:17,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:17,039 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:17,990 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:43:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:17,990 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:17,991 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:43:17,991 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:43:17,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:17,991 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:17,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:43:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 181. [2022-02-24 01:43:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-24 01:43:18,266 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 66 [2022-02-24 01:43:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:18,266 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-24 01:43:18,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-24 01:43:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:18,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:18,266 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:18,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356 [2022-02-24 01:43:18,266 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:18,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1102619924, now seen corresponding path program 355 times [2022-02-24 01:43:18,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:18,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694984417] [2022-02-24 01:43:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:18,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:18,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:18,268 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:18,268 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:18,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:18,617 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:18,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694984417] [2022-02-24 01:43:18,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694984417] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:18,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:18,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:18,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018352862] [2022-02-24 01:43:18,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:18,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:18,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:18,618 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:19,616 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:43:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:19,616 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:19,616 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:43:19,617 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:43:19,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:19,617 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:19,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 27 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:43:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:43:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 183. [2022-02-24 01:43:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-24 01:43:19,910 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 66 [2022-02-24 01:43:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:19,910 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-24 01:43:19,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-24 01:43:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:19,910 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:19,910 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:19,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357 [2022-02-24 01:43:19,910 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:19,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1411104148, now seen corresponding path program 356 times [2022-02-24 01:43:19,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:19,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13636531] [2022-02-24 01:43:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:19,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:19,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:19,912 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:19,912 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:20,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:20,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:20,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13636531] [2022-02-24 01:43:20,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [13636531] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:20,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:20,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:20,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444893841] [2022-02-24 01:43:20,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:20,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:20,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:20,260 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:21,276 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:43:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:21,277 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:21,277 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:43:21,277 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:43:21,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:21,277 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:21,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:43:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:43:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 185. [2022-02-24 01:43:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-24 01:43:21,577 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 66 [2022-02-24 01:43:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:21,577 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-24 01:43:21,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-24 01:43:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:21,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:21,578 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:21,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358 [2022-02-24 01:43:21,578 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:21,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1511699988, now seen corresponding path program 357 times [2022-02-24 01:43:21,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:21,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723442445] [2022-02-24 01:43:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:21,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:21,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:21,579 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:21,579 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:21,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:21,929 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:21,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723442445] [2022-02-24 01:43:21,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [723442445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:21,929 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:21,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:21,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783330899] [2022-02-24 01:43:21,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:21,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:21,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:21,930 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:22,964 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:43:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:22,964 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:22,965 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:43:22,965 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:43:22,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:22,965 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:22,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:43:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 187. [2022-02-24 01:43:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-24 01:43:23,266 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 66 [2022-02-24 01:43:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:23,266 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-24 01:43:23,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-24 01:43:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:23,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:23,267 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:23,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359 [2022-02-24 01:43:23,267 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:23,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash 599945580, now seen corresponding path program 358 times [2022-02-24 01:43:23,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:23,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694647868] [2022-02-24 01:43:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:23,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:23,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:23,269 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:23,269 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:23,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:23,617 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:23,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694647868] [2022-02-24 01:43:23,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694647868] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:23,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:23,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:23,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881803991] [2022-02-24 01:43:23,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:23,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:23,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:23,618 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:24,664 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:43:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:24,665 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:43:24,665 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:43:24,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:24,665 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:24,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:43:24,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2022-02-24 01:43:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-24 01:43:24,977 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 66 [2022-02-24 01:43:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:24,977 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-24 01:43:24,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-24 01:43:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:24,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:24,978 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:24,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360 [2022-02-24 01:43:24,978 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1628194580, now seen corresponding path program 359 times [2022-02-24 01:43:24,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:24,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249016623] [2022-02-24 01:43:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:24,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:24,979 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:24,979 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:24,979 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:25,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:25,326 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:25,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249016623] [2022-02-24 01:43:25,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [249016623] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:25,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:25,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:25,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211795132] [2022-02-24 01:43:25,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:25,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:25,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:25,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:25,327 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:26,397 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:43:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:26,397 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:26,398 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:43:26,398 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:43:26,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:26,398 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:26,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 27 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:43:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 191. [2022-02-24 01:43:26,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-24 01:43:26,724 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 66 [2022-02-24 01:43:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:26,724 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-24 01:43:26,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-24 01:43:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:26,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:26,725 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:26,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361 [2022-02-24 01:43:26,725 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash 317792364, now seen corresponding path program 360 times [2022-02-24 01:43:26,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:26,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526332559] [2022-02-24 01:43:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:26,727 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:26,727 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:26,727 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:27,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:27,074 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:27,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526332559] [2022-02-24 01:43:27,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [526332559] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:27,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:27,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:27,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42493260] [2022-02-24 01:43:27,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:27,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:27,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:27,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:27,075 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:28,160 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:43:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:28,160 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:28,161 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:43:28,161 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:43:28,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:28,161 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:28,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:43:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 193. [2022-02-24 01:43:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-24 01:43:28,487 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 66 [2022-02-24 01:43:28,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:28,487 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-24 01:43:28,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:28,487 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-24 01:43:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:28,487 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:28,488 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:28,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362 [2022-02-24 01:43:28,488 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2100471788, now seen corresponding path program 361 times [2022-02-24 01:43:28,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:28,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440899413] [2022-02-24 01:43:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:28,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:28,489 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:28,489 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:28,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:28,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:28,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440899413] [2022-02-24 01:43:28,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440899413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:28,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:28,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:28,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567866713] [2022-02-24 01:43:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:28,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:28,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:28,840 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:29,961 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:43:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:29,961 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:43:29,961 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:43:29,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:29,962 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:29,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:43:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:43:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 195. [2022-02-24 01:43:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-24 01:43:30,297 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 66 [2022-02-24 01:43:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:30,297 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-24 01:43:30,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-24 01:43:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:30,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:30,297 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:30,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363 [2022-02-24 01:43:30,297 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:30,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1563447148, now seen corresponding path program 362 times [2022-02-24 01:43:30,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:30,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35006296] [2022-02-24 01:43:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:30,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:30,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:30,300 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:30,300 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:30,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:30,679 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:30,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35006296] [2022-02-24 01:43:30,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [35006296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:30,679 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:30,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:30,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835984698] [2022-02-24 01:43:30,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:30,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:30,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:30,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:30,680 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:31,804 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:43:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:31,804 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:43:31,804 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:43:31,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:31,805 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:31,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:43:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 197. [2022-02-24 01:43:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-24 01:43:32,170 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 66 [2022-02-24 01:43:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:32,170 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-24 01:43:32,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-24 01:43:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:32,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:32,170 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:32,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364 [2022-02-24 01:43:32,170 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash 878843628, now seen corresponding path program 363 times [2022-02-24 01:43:32,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:32,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500933710] [2022-02-24 01:43:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:32,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:32,172 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:32,172 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:32,172 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:32,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:32,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:32,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500933710] [2022-02-24 01:43:32,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1500933710] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:32,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:32,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:32,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031398074] [2022-02-24 01:43:32,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:32,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:32,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:32,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:32,522 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:33,679 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:43:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:33,680 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:33,680 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:43:33,680 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:43:33,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:33,681 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:33,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:43:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:43:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 199. [2022-02-24 01:43:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-24 01:43:34,035 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 66 [2022-02-24 01:43:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:34,036 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-24 01:43:34,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-24 01:43:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:34,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:34,036 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:34,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365 [2022-02-24 01:43:34,036 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash 104857196, now seen corresponding path program 364 times [2022-02-24 01:43:34,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:34,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520138442] [2022-02-24 01:43:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:34,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:34,038 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:34,038 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:34,038 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:34,385 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:34,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520138442] [2022-02-24 01:43:34,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [520138442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:34,385 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:34,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:34,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307992322] [2022-02-24 01:43:34,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:34,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:34,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:34,386 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:35,547 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:43:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:35,547 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:35,547 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:43:35,547 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:43:35,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:35,548 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:35,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:43:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2022-02-24 01:43:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-24 01:43:35,901 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 66 [2022-02-24 01:43:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:35,901 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-24 01:43:35,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-24 01:43:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:35,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:35,902 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:35,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366 [2022-02-24 01:43:35,902 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash -666761748, now seen corresponding path program 365 times [2022-02-24 01:43:35,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:35,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482662295] [2022-02-24 01:43:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:35,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:35,904 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:35,904 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:36,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:36,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:36,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482662295] [2022-02-24 01:43:36,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [482662295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:36,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:36,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:36,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257518748] [2022-02-24 01:43:36,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:36,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:36,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:36,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:36,265 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:37,450 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:43:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:37,451 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:43:37,451 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:43:37,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:37,451 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:37,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:43:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 203. [2022-02-24 01:43:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-24 01:43:37,814 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 66 [2022-02-24 01:43:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:37,814 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-24 01:43:37,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-24 01:43:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:37,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:37,814 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:37,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367 [2022-02-24 01:43:37,814 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:37,815 INFO L85 PathProgramCache]: Analyzing trace with hash 836775276, now seen corresponding path program 366 times [2022-02-24 01:43:37,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:37,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166584450] [2022-02-24 01:43:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:37,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:37,816 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:37,816 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:37,816 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:38,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:38,163 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:38,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166584450] [2022-02-24 01:43:38,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [166584450] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:38,163 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:38,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:38,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655765508] [2022-02-24 01:43:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:38,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:38,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:38,164 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:39,358 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:43:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:39,358 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:43:39,358 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:43:39,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:39,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:39,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:43:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2022-02-24 01:43:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-24 01:43:39,727 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 66 [2022-02-24 01:43:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:39,727 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-24 01:43:39,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-24 01:43:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:39,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:39,727 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:39,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368 [2022-02-24 01:43:39,727 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1668123412, now seen corresponding path program 367 times [2022-02-24 01:43:39,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:39,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340008243] [2022-02-24 01:43:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:39,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:39,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:39,729 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:39,729 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:40,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:40,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:40,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340008243] [2022-02-24 01:43:40,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340008243] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:40,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:40,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:40,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103963976] [2022-02-24 01:43:40,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:40,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:40,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:40,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:40,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:40,077 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:41,295 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:43:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:41,295 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:41,296 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:43:41,296 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:43:41,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:41,296 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:41,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:43:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 207. [2022-02-24 01:43:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-24 01:43:41,671 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 66 [2022-02-24 01:43:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:41,672 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-24 01:43:41,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-24 01:43:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:41,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:41,672 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:41,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369 [2022-02-24 01:43:41,672 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash 600890476, now seen corresponding path program 368 times [2022-02-24 01:43:41,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:41,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726559343] [2022-02-24 01:43:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:41,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:41,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:41,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:41,674 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:42,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:42,020 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:42,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726559343] [2022-02-24 01:43:42,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [726559343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:42,020 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:42,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:42,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200975156] [2022-02-24 01:43:42,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:42,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:42,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:42,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:42,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:42,021 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:43,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:43,255 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:43:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:43,255 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:43,256 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:43:43,256 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:43:43,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:43,256 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:43,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:43:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 209. [2022-02-24 01:43:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-24 01:43:43,639 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 66 [2022-02-24 01:43:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:43,639 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-24 01:43:43,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-24 01:43:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:43,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:43,639 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:43,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370 [2022-02-24 01:43:43,640 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:43,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:43,640 INFO L85 PathProgramCache]: Analyzing trace with hash -720149524, now seen corresponding path program 369 times [2022-02-24 01:43:43,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:43,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230585917] [2022-02-24 01:43:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:43,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:43,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:43,641 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:43,641 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:44,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:44,017 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:44,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230585917] [2022-02-24 01:43:44,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230585917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:44,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:44,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:44,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825642442] [2022-02-24 01:43:44,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:44,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:44,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:44,018 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:45,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:45,279 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-24 01:43:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:45,279 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:45,280 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:43:45,280 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:43:45,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:45,280 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:45,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:43:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 211. [2022-02-24 01:43:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-24 01:43:45,667 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 66 [2022-02-24 01:43:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:45,667 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-24 01:43:45,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-24 01:43:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:45,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:45,668 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:45,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371 [2022-02-24 01:43:45,668 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:45,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:45,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1070730092, now seen corresponding path program 370 times [2022-02-24 01:43:45,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:45,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110251019] [2022-02-24 01:43:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:45,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:45,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:45,669 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:45,670 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:46,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:46,021 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:46,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110251019] [2022-02-24 01:43:46,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110251019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:46,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:46,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:46,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628352209] [2022-02-24 01:43:46,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:46,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:46,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:46,022 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:47,306 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-24 01:43:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:47,307 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:47,307 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:43:47,307 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:43:47,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:47,308 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:47,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 29 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:43:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:43:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 213. [2022-02-24 01:43:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-24 01:43:47,700 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 66 [2022-02-24 01:43:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:47,700 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-24 01:43:47,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-24 01:43:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:47,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:47,701 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:47,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372 [2022-02-24 01:43:47,701 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash -175844628, now seen corresponding path program 371 times [2022-02-24 01:43:47,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:47,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710694525] [2022-02-24 01:43:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:47,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:47,702 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:47,702 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:47,702 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:48,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:48,051 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:48,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710694525] [2022-02-24 01:43:48,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [710694525] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:48,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:48,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:48,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772061207] [2022-02-24 01:43:48,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:48,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:48,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:48,052 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:49,341 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-24 01:43:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:49,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:49,341 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:43:49,341 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 01:43:49,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:49,342 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:49,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:43:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 01:43:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 215. [2022-02-24 01:43:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-24 01:43:49,742 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 66 [2022-02-24 01:43:49,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:49,742 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-24 01:43:49,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:49,742 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-24 01:43:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:49,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:49,742 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:49,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373 [2022-02-24 01:43:49,743 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:49,743 INFO L85 PathProgramCache]: Analyzing trace with hash 161725036, now seen corresponding path program 372 times [2022-02-24 01:43:49,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:49,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167481163] [2022-02-24 01:43:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:49,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:49,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:49,744 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:49,744 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:50,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:50,104 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:50,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167481163] [2022-02-24 01:43:50,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167481163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:50,105 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:50,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:50,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373440896] [2022-02-24 01:43:50,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:50,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:50,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:50,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:50,106 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:51,415 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-24 01:43:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:51,416 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:43:51,416 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:43:51,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:51,416 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:51,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:43:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:43:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 217. [2022-02-24 01:43:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-24 01:43:51,814 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 66 [2022-02-24 01:43:51,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:51,814 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-24 01:43:51,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-24 01:43:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:51,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:51,815 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:51,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374 [2022-02-24 01:43:51,815 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:51,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:51,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1851342356, now seen corresponding path program 373 times [2022-02-24 01:43:51,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:51,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784622822] [2022-02-24 01:43:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:51,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:51,817 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:51,817 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:51,817 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:52,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:52,166 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:52,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784622822] [2022-02-24 01:43:52,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [784622822] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:52,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:52,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:52,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302649127] [2022-02-24 01:43:52,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:52,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:52,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:52,167 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:53,470 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-24 01:43:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:53,471 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:53,471 INFO L225 Difference]: With dead ends: 314 [2022-02-24 01:43:53,471 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:43:53,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:53,472 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:53,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:43:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 219. [2022-02-24 01:43:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-24 01:43:53,876 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 66 [2022-02-24 01:43:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:53,876 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-24 01:43:53,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-24 01:43:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:53,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:53,877 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:53,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375 [2022-02-24 01:43:53,877 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:53,877 INFO L85 PathProgramCache]: Analyzing trace with hash 621144428, now seen corresponding path program 374 times [2022-02-24 01:43:53,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:53,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718712074] [2022-02-24 01:43:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:53,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:53,878 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:53,878 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:53,878 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:54,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:54,228 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:54,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718712074] [2022-02-24 01:43:54,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1718712074] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:54,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:54,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:54,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965535788] [2022-02-24 01:43:54,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:54,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:54,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:54,229 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:55,549 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-24 01:43:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:55,549 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:55,550 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:43:55,550 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 01:43:55,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:55,550 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:55,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 01:43:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 221. [2022-02-24 01:43:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-24 01:43:55,959 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 66 [2022-02-24 01:43:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:55,959 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-24 01:43:55,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-24 01:43:55,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:55,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:55,960 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:55,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376 [2022-02-24 01:43:55,960 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1564029164, now seen corresponding path program 375 times [2022-02-24 01:43:55,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:55,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153394977] [2022-02-24 01:43:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:55,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:55,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:55,962 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:55,962 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:56,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:56,308 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:56,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153394977] [2022-02-24 01:43:56,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153394977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:56,308 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:56,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:56,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311427495] [2022-02-24 01:43:56,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:56,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:56,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:56,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:56,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:56,309 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:57,639 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-24 01:43:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:57,640 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:57,640 INFO L225 Difference]: With dead ends: 326 [2022-02-24 01:43:57,640 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 01:43:57,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:57,641 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:57,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:43:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 01:43:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 223. [2022-02-24 01:43:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-24 01:43:58,059 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 66 [2022-02-24 01:43:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:43:58,059 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-24 01:43:58,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-24 01:43:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:43:58,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:43:58,060 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:43:58,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377 [2022-02-24 01:43:58,060 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:43:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:43:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1438161004, now seen corresponding path program 376 times [2022-02-24 01:43:58,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:43:58,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626645740] [2022-02-24 01:43:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:43:58,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:43:58,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:43:58,061 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:43:58,061 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:43:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:58,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:43:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:43:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:43:58,406 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:43:58,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626645740] [2022-02-24 01:43:58,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [626645740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:43:58,407 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:43:58,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:43:58,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523765290] [2022-02-24 01:43:58,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:43:58,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:43:58,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:43:58,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:43:58,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:43:58,407 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:43:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:43:59,743 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-24 01:43:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:43:59,743 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:43:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:43:59,744 INFO L225 Difference]: With dead ends: 332 [2022-02-24 01:43:59,744 INFO L226 Difference]: Without dead ends: 326 [2022-02-24 01:43:59,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:43:59,744 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:43:59,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:43:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-24 01:44:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 225. [2022-02-24 01:44:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-24 01:44:00,167 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 66 [2022-02-24 01:44:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:00,167 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-24 01:44:00,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-24 01:44:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:44:00,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:00,167 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:00,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable378 [2022-02-24 01:44:00,167 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash 737943532, now seen corresponding path program 377 times [2022-02-24 01:44:00,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:00,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704914402] [2022-02-24 01:44:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:00,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:00,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:00,169 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:00,169 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:00,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:00,517 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:00,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704914402] [2022-02-24 01:44:00,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1704914402] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:00,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:00,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:44:00,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847109047] [2022-02-24 01:44:00,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:00,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:44:00,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:00,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:44:00,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:44:00,518 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:01,719 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:44:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:44:01,720 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:44:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:01,720 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:44:01,720 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:44:01,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:44:01,720 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:01,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:44:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:44:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 175. [2022-02-24 01:44:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-24 01:44:02,002 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 66 [2022-02-24 01:44:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:02,002 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-24 01:44:02,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-24 01:44:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:02,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:02,003 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:02,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379 [2022-02-24 01:44:02,003 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:02,003 INFO L85 PathProgramCache]: Analyzing trace with hash 951415631, now seen corresponding path program 378 times [2022-02-24 01:44:02,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:02,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955036644] [2022-02-24 01:44:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:02,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:02,004 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:02,004 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:02,004 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:02,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:02,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:02,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955036644] [2022-02-24 01:44:02,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1955036644] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:02,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:02,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:02,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436842914] [2022-02-24 01:44:02,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:02,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:02,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:02,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:02,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:02,380 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:03,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:03,393 INFO L93 Difference]: Finished difference Result 190 states and 276 transitions. [2022-02-24 01:44:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:03,394 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:03,395 INFO L225 Difference]: With dead ends: 190 [2022-02-24 01:44:03,395 INFO L226 Difference]: Without dead ends: 184 [2022-02-24 01:44:03,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:03,395 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:03,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 17 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:44:03,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-24 01:44:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2022-02-24 01:44:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-24 01:44:03,682 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 68 [2022-02-24 01:44:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:03,682 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-24 01:44:03,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-24 01:44:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:03,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:03,682 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:03,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380 [2022-02-24 01:44:03,682 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash -143533361, now seen corresponding path program 379 times [2022-02-24 01:44:03,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:03,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338001828] [2022-02-24 01:44:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:03,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:03,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:03,684 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:03,684 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:04,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:04,058 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:04,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338001828] [2022-02-24 01:44:04,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338001828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:04,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:04,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:04,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509251375] [2022-02-24 01:44:04,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:04,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:04,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:04,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:04,059 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:05,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:05,084 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-24 01:44:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:05,084 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:05,084 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:44:05,084 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:44:05,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:05,085 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:05,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:44:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2022-02-24 01:44:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-24 01:44:05,390 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 68 [2022-02-24 01:44:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:05,391 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-24 01:44:05,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-24 01:44:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:05,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:05,391 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:05,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381 [2022-02-24 01:44:05,391 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:05,391 INFO L85 PathProgramCache]: Analyzing trace with hash -122527153, now seen corresponding path program 380 times [2022-02-24 01:44:05,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:05,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699311990] [2022-02-24 01:44:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:05,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:05,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:05,393 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:05,394 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:05,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:05,770 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:05,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699311990] [2022-02-24 01:44:05,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [699311990] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:05,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:05,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:05,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975517811] [2022-02-24 01:44:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:05,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:05,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:05,771 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:06,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:06,802 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:44:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:06,803 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:06,803 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:44:06,803 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:44:06,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:06,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:06,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:44:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2022-02-24 01:44:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-24 01:44:07,117 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 68 [2022-02-24 01:44:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:07,117 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-24 01:44:07,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-24 01:44:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:07,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:07,118 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:07,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382 [2022-02-24 01:44:07,118 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:07,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1410397745, now seen corresponding path program 381 times [2022-02-24 01:44:07,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:07,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116259757] [2022-02-24 01:44:07,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:07,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:07,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:07,121 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:07,121 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:07,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:07,496 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:07,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116259757] [2022-02-24 01:44:07,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [116259757] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:07,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:07,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:07,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305232920] [2022-02-24 01:44:07,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:07,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:07,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:07,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:07,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:07,500 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:08,544 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:44:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:08,546 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:44:08,546 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:44:08,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:08,547 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:08,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 15 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:44:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:44:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 187. [2022-02-24 01:44:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-24 01:44:08,867 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 68 [2022-02-24 01:44:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:08,867 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-24 01:44:08,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-24 01:44:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:08,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:08,868 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:08,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383 [2022-02-24 01:44:08,868 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2103455409, now seen corresponding path program 382 times [2022-02-24 01:44:08,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:08,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581984773] [2022-02-24 01:44:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:08,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:08,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:08,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:08,870 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:09,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:09,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:09,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581984773] [2022-02-24 01:44:09,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [581984773] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:09,243 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:09,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:09,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224592260] [2022-02-24 01:44:09,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:09,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:09,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:09,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:09,244 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:10,318 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:44:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:10,319 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:10,319 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:44:10,319 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:44:10,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:10,320 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:10,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:10,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:44:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 189. [2022-02-24 01:44:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-24 01:44:10,647 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 68 [2022-02-24 01:44:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:10,647 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-24 01:44:10,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-24 01:44:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:10,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:10,647 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:10,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384 [2022-02-24 01:44:10,647 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1883027663, now seen corresponding path program 383 times [2022-02-24 01:44:10,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:10,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599892761] [2022-02-24 01:44:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:10,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:10,649 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:10,649 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:10,649 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:11,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:11,018 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:11,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599892761] [2022-02-24 01:44:11,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [599892761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:11,018 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:11,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:11,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270385974] [2022-02-24 01:44:11,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:11,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:11,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:11,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:11,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:11,019 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:12,112 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:44:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:12,113 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:12,113 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:44:12,113 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:44:12,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:12,114 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:12,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:44:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2022-02-24 01:44:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-24 01:44:12,445 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 68 [2022-02-24 01:44:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:12,445 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-24 01:44:12,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-24 01:44:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:12,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:12,445 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:12,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385 [2022-02-24 01:44:12,445 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1782431823, now seen corresponding path program 384 times [2022-02-24 01:44:12,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:12,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839381346] [2022-02-24 01:44:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:12,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:12,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:12,447 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:12,447 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:12,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:12,822 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:12,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839381346] [2022-02-24 01:44:12,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839381346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:12,822 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:12,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:12,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709184171] [2022-02-24 01:44:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:12,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:12,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:12,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:12,823 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:13,938 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:44:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:13,939 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:44:13,939 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:44:13,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:13,939 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:13,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:44:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 193. [2022-02-24 01:44:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-24 01:44:14,278 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 68 [2022-02-24 01:44:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:14,278 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-24 01:44:14,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-24 01:44:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:14,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:14,278 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:14,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386 [2022-02-24 01:44:14,278 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash -400889905, now seen corresponding path program 385 times [2022-02-24 01:44:14,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:14,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916296062] [2022-02-24 01:44:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:14,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:14,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:14,280 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:14,280 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:14,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:14,651 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:14,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916296062] [2022-02-24 01:44:14,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1916296062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:14,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:14,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:14,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515856637] [2022-02-24 01:44:14,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:14,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:14,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:14,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:14,652 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:15,780 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:44:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:15,780 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:15,781 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:44:15,781 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:44:15,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:15,781 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:15,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:44:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 195. [2022-02-24 01:44:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-24 01:44:16,127 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 68 [2022-02-24 01:44:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:16,127 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-24 01:44:16,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-24 01:44:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:16,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:16,127 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:16,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387 [2022-02-24 01:44:16,127 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1665937231, now seen corresponding path program 386 times [2022-02-24 01:44:16,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:16,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021557323] [2022-02-24 01:44:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:16,129 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:16,129 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:16,129 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:16,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:16,498 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:16,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021557323] [2022-02-24 01:44:16,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1021557323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:16,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:16,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:16,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501382241] [2022-02-24 01:44:16,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:16,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:16,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:16,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:16,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:16,499 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:17,644 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:44:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:17,644 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:17,644 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:44:17,644 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:44:17,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:17,645 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:17,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 17 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:44:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:44:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 197. [2022-02-24 01:44:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-24 01:44:18,002 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 68 [2022-02-24 01:44:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:18,002 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-24 01:44:18,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-24 01:44:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:18,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:18,003 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:18,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388 [2022-02-24 01:44:18,003 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:18,003 INFO L85 PathProgramCache]: Analyzing trace with hash -683043121, now seen corresponding path program 387 times [2022-02-24 01:44:18,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:18,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006930846] [2022-02-24 01:44:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:18,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:18,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:18,005 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:18,005 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:18,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:18,378 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:18,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006930846] [2022-02-24 01:44:18,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006930846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:18,378 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:18,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:18,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755280848] [2022-02-24 01:44:18,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:18,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:18,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:18,379 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:19,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:19,555 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:44:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:19,556 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:44:19,556 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:44:19,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:19,556 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:19,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:44:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 199. [2022-02-24 01:44:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-24 01:44:19,915 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 68 [2022-02-24 01:44:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:19,916 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-24 01:44:19,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-24 01:44:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:19,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:19,916 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:19,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable389 [2022-02-24 01:44:19,916 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1099636303, now seen corresponding path program 388 times [2022-02-24 01:44:19,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:19,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039238081] [2022-02-24 01:44:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:19,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:19,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:19,918 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:19,918 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:20,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:20,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:20,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039238081] [2022-02-24 01:44:20,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2039238081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:20,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:20,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:20,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042313530] [2022-02-24 01:44:20,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:20,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:20,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:20,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:20,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:20,354 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:21,551 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:44:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:21,552 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:44:21,552 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:44:21,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:21,553 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:21,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:21,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:44:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 201. [2022-02-24 01:44:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-24 01:44:21,921 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 68 [2022-02-24 01:44:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:21,921 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-24 01:44:21,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-24 01:44:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:21,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:21,922 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:21,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390 [2022-02-24 01:44:21,922 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 562611663, now seen corresponding path program 389 times [2022-02-24 01:44:21,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:21,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270715784] [2022-02-24 01:44:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:21,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:21,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:21,924 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:21,924 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:22,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:22,294 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:22,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270715784] [2022-02-24 01:44:22,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [270715784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:22,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:22,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:22,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862030818] [2022-02-24 01:44:22,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:22,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:22,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:22,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:22,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:22,295 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:23,513 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:44:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:23,513 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:23,513 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:44:23,513 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:44:23,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:23,514 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:23,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:44:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 203. [2022-02-24 01:44:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-24 01:44:23,890 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 68 [2022-02-24 01:44:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:23,890 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-24 01:44:23,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-24 01:44:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:23,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:23,891 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:23,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391 [2022-02-24 01:44:23,891 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:23,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash -121991857, now seen corresponding path program 390 times [2022-02-24 01:44:23,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:23,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821661414] [2022-02-24 01:44:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:23,893 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:23,893 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:23,893 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:24,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:24,273 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:24,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821661414] [2022-02-24 01:44:24,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821661414] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:24,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:24,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:24,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263797252] [2022-02-24 01:44:24,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:24,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:24,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:24,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:24,274 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:25,517 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:44:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:25,518 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:44:25,518 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:44:25,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:25,518 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:25,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:44:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 205. [2022-02-24 01:44:25,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-24 01:44:25,905 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 68 [2022-02-24 01:44:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:25,905 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-24 01:44:25,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:25,905 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-24 01:44:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:25,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:25,905 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:25,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392 [2022-02-24 01:44:25,905 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash -895978289, now seen corresponding path program 391 times [2022-02-24 01:44:25,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:25,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980284506] [2022-02-24 01:44:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:25,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:25,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:25,907 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:25,907 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:26,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:26,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:26,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980284506] [2022-02-24 01:44:26,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [980284506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:26,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:26,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:26,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523672655] [2022-02-24 01:44:26,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:26,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:26,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:26,365 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:27,654 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:44:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:27,654 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:27,654 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:44:27,654 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:44:27,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:27,655 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:27,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:27,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:44:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 207. [2022-02-24 01:44:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-24 01:44:28,056 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 68 [2022-02-24 01:44:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:28,056 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-24 01:44:28,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-24 01:44:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:28,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:28,056 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:28,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393 [2022-02-24 01:44:28,056 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:28,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1667597233, now seen corresponding path program 392 times [2022-02-24 01:44:28,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:28,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393250691] [2022-02-24 01:44:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:28,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:28,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:28,058 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:28,058 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:28,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:28,429 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:28,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393250691] [2022-02-24 01:44:28,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [393250691] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:28,429 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:28,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:28,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902134476] [2022-02-24 01:44:28,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:28,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:28,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:28,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:28,430 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:29,707 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:44:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:29,708 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:44:29,708 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:44:29,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:29,708 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:29,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 17 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:44:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 209. [2022-02-24 01:44:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-24 01:44:30,112 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 68 [2022-02-24 01:44:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:30,112 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-24 01:44:30,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-24 01:44:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:30,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:30,113 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:30,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394 [2022-02-24 01:44:30,113 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash -164060209, now seen corresponding path program 393 times [2022-02-24 01:44:30,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:30,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171830702] [2022-02-24 01:44:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:30,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:30,115 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:30,115 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:30,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:30,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:30,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171830702] [2022-02-24 01:44:30,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [171830702] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:30,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:30,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:30,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939285188] [2022-02-24 01:44:30,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:30,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:30,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:30,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:30,490 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:31,789 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:44:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:31,789 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:31,790 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:44:31,790 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:44:31,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:31,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:31,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:44:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 211. [2022-02-24 01:44:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-24 01:44:32,197 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 68 [2022-02-24 01:44:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:32,197 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-24 01:44:32,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-24 01:44:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:32,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:32,198 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:32,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395 [2022-02-24 01:44:32,198 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008399, now seen corresponding path program 394 times [2022-02-24 01:44:32,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:32,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090617012] [2022-02-24 01:44:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:32,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:32,199 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:32,199 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:32,199 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:32,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:32,569 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:32,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090617012] [2022-02-24 01:44:32,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2090617012] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:32,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:32,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:32,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929924445] [2022-02-24 01:44:32,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:32,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:32,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:32,570 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:33,895 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:44:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:33,896 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:44:33,896 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:44:33,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:33,896 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:33,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 15 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:44:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 213. [2022-02-24 01:44:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-24 01:44:34,309 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 68 [2022-02-24 01:44:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:34,309 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-24 01:44:34,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-24 01:44:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:34,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:34,309 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:34,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396 [2022-02-24 01:44:34,309 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash -399945009, now seen corresponding path program 395 times [2022-02-24 01:44:34,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:34,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807094116] [2022-02-24 01:44:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:34,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:34,311 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:34,311 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:34,311 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:34,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:34,680 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:34,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807094116] [2022-02-24 01:44:34,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1807094116] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:34,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:34,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:34,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077590041] [2022-02-24 01:44:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:34,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:34,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:34,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:34,681 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:36,018 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-24 01:44:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:36,019 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:36,019 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:44:36,019 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:44:36,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:36,020 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:36,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:44:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 215. [2022-02-24 01:44:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-24 01:44:36,444 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 68 [2022-02-24 01:44:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:36,445 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-24 01:44:36,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-24 01:44:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:36,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:36,445 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:36,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397 [2022-02-24 01:44:36,445 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1720985009, now seen corresponding path program 396 times [2022-02-24 01:44:36,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:36,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750614332] [2022-02-24 01:44:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:36,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:36,447 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:36,447 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:36,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:36,816 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:36,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750614332] [2022-02-24 01:44:36,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1750614332] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:36,816 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:36,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:36,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763863841] [2022-02-24 01:44:36,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:36,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:36,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:36,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:36,817 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:38,165 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-24 01:44:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:38,166 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:44:38,166 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:44:38,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:38,166 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:38,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:44:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 217. [2022-02-24 01:44:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-24 01:44:38,596 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 68 [2022-02-24 01:44:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:38,596 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-24 01:44:38,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-24 01:44:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:38,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:38,597 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:38,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398 [2022-02-24 01:44:38,597 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash 69894607, now seen corresponding path program 397 times [2022-02-24 01:44:38,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:38,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916814586] [2022-02-24 01:44:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:38,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:38,598 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:38,598 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:38,598 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:38,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:38,972 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:38,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916814586] [2022-02-24 01:44:38,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1916814586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:38,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:38,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:38,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446607690] [2022-02-24 01:44:38,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:38,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:38,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:38,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:38,973 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:40,328 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-24 01:44:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:40,328 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:40,329 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:44:40,329 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 01:44:40,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:40,329 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:40,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:44:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 01:44:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 219. [2022-02-24 01:44:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-24 01:44:40,759 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 68 [2022-02-24 01:44:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:40,759 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-24 01:44:40,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-24 01:44:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:40,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:40,760 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:40,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399 [2022-02-24 01:44:40,760 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1176680113, now seen corresponding path program 398 times [2022-02-24 01:44:40,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:40,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980911909] [2022-02-24 01:44:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:40,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:40,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:40,762 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:40,762 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:41,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:41,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:41,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980911909] [2022-02-24 01:44:41,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [980911909] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:41,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:41,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:41,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114615266] [2022-02-24 01:44:41,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:41,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:41,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:41,132 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:42,505 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-24 01:44:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:42,506 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:44:42,506 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:44:42,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:42,506 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:42,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:44:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:44:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 221. [2022-02-24 01:44:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-24 01:44:42,938 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 68 [2022-02-24 01:44:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:42,939 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-24 01:44:42,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-24 01:44:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:42,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:42,939 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:42,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400 [2022-02-24 01:44:42,939 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:42,939 INFO L85 PathProgramCache]: Analyzing trace with hash -839110449, now seen corresponding path program 399 times [2022-02-24 01:44:42,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:42,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91147123] [2022-02-24 01:44:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:42,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:42,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:42,941 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:42,941 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:43,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:43,311 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:43,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91147123] [2022-02-24 01:44:43,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [91147123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:43,311 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:43,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:43,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030492045] [2022-02-24 01:44:43,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:43,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:43,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:43,312 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:44,696 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-24 01:44:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:44,697 INFO L225 Difference]: With dead ends: 314 [2022-02-24 01:44:44,697 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:44:44,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:44,697 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:44,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:44:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 223. [2022-02-24 01:44:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-24 01:44:45,142 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 68 [2022-02-24 01:44:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:45,142 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-24 01:44:45,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-24 01:44:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:45,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:45,143 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:45,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401 [2022-02-24 01:44:45,143 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1442789455, now seen corresponding path program 400 times [2022-02-24 01:44:45,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:45,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32312412] [2022-02-24 01:44:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:45,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:45,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:45,144 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:45,145 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:45,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:45,514 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:45,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32312412] [2022-02-24 01:44:45,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [32312412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:45,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:45,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:45,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666282972] [2022-02-24 01:44:45,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:45,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:45,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:45,515 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:46,945 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-24 01:44:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:46,945 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:46,946 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:44:46,946 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 01:44:46,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:46,946 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:46,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:44:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 01:44:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 225. [2022-02-24 01:44:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-24 01:44:47,422 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 68 [2022-02-24 01:44:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:47,422 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-24 01:44:47,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-24 01:44:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:47,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:47,423 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:47,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402 [2022-02-24 01:44:47,423 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash -379691057, now seen corresponding path program 401 times [2022-02-24 01:44:47,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:47,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096916799] [2022-02-24 01:44:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:47,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:47,425 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:47,425 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:47,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:47,852 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:47,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096916799] [2022-02-24 01:44:47,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1096916799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:47,852 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:47,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:47,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345738370] [2022-02-24 01:44:47,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:47,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:47,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:47,853 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:49,275 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-24 01:44:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:49,276 INFO L225 Difference]: With dead ends: 326 [2022-02-24 01:44:49,276 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 01:44:49,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:49,277 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:49,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 01:44:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 227. [2022-02-24 01:44:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-24 01:44:49,736 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 68 [2022-02-24 01:44:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:49,736 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-24 01:44:49,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-24 01:44:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:49,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:49,737 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:49,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403 [2022-02-24 01:44:49,737 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:49,737 INFO L85 PathProgramCache]: Analyzing trace with hash 563193679, now seen corresponding path program 402 times [2022-02-24 01:44:49,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:49,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048066388] [2022-02-24 01:44:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:49,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:49,739 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:49,739 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:49,739 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:50,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:50,112 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:50,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048066388] [2022-02-24 01:44:50,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2048066388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:50,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:50,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:50,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033730323] [2022-02-24 01:44:50,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:50,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:50,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:50,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:50,113 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:51,550 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-24 01:44:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:51,550 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:51,551 INFO L225 Difference]: With dead ends: 332 [2022-02-24 01:44:51,551 INFO L226 Difference]: Without dead ends: 326 [2022-02-24 01:44:51,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:51,551 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:51,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-24 01:44:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2022-02-24 01:44:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-24 01:44:52,019 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 68 [2022-02-24 01:44:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:52,019 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-24 01:44:52,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-24 01:44:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:52,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:52,019 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:52,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404 [2022-02-24 01:44:52,019 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:52,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash 437325519, now seen corresponding path program 403 times [2022-02-24 01:44:52,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:52,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056288421] [2022-02-24 01:44:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:52,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:52,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:52,021 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:52,021 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:52,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:52,403 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:52,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056288421] [2022-02-24 01:44:52,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1056288421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:52,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:52,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:52,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559392420] [2022-02-24 01:44:52,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:52,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:52,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:52,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:52,404 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:53,846 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-24 01:44:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:53,847 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:53,847 INFO L225 Difference]: With dead ends: 338 [2022-02-24 01:44:53,847 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 01:44:53,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:53,847 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:53,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:44:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 01:44:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 231. [2022-02-24 01:44:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-24 01:44:54,303 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 68 [2022-02-24 01:44:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:54,303 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-24 01:44:54,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-24 01:44:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:54,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:54,304 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:54,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405 [2022-02-24 01:44:54,304 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -262891953, now seen corresponding path program 404 times [2022-02-24 01:44:54,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:54,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61380752] [2022-02-24 01:44:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:54,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:54,305 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:54,305 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:54,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:54,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:54,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61380752] [2022-02-24 01:44:54,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [61380752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:54,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:54,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:54,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777193226] [2022-02-24 01:44:54,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:54,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:54,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:54,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:54,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:54,677 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:56,121 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-24 01:44:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:56,122 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:56,122 INFO L225 Difference]: With dead ends: 344 [2022-02-24 01:44:56,122 INFO L226 Difference]: Without dead ends: 338 [2022-02-24 01:44:56,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:56,123 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:56,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 25 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:56,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-24 01:44:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 233. [2022-02-24 01:44:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-24 01:44:56,580 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 68 [2022-02-24 01:44:56,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:56,580 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-24 01:44:56,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-24 01:44:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:44:56,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:56,580 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:56,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406 [2022-02-24 01:44:56,580 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:56,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1137982927, now seen corresponding path program 405 times [2022-02-24 01:44:56,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:56,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708916100] [2022-02-24 01:44:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:56,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:56,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:56,582 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:56,582 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:56,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:56,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:56,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708916100] [2022-02-24 01:44:56,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708916100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:56,953 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:56,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:44:56,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77108415] [2022-02-24 01:44:56,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:56,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:44:56,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:56,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:44:56,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:44:56,954 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:44:58,262 INFO L93 Difference]: Finished difference Result 294 states and 431 transitions. [2022-02-24 01:44:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:44:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:44:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:44:58,263 INFO L225 Difference]: With dead ends: 294 [2022-02-24 01:44:58,263 INFO L226 Difference]: Without dead ends: 288 [2022-02-24 01:44:58,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:44:58,263 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:44:58,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:44:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-24 01:44:58,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 181. [2022-02-24 01:44:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-24 01:44:58,573 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 68 [2022-02-24 01:44:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:44:58,573 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-24 01:44:58,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:44:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-24 01:44:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:44:58,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:44:58,574 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:44:58,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407 [2022-02-24 01:44:58,574 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:44:58,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:44:58,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1221188850, now seen corresponding path program 406 times [2022-02-24 01:44:58,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:44:58,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164567019] [2022-02-24 01:44:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:44:58,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:44:58,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:44:58,576 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:44:58,576 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:44:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:59,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:44:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:44:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:44:59,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:44:59,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164567019] [2022-02-24 01:44:59,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [164567019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:44:59,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:44:59,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:44:59,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653316536] [2022-02-24 01:44:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:44:59,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:44:59,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:44:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:44:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:44:59,029 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:00,125 INFO L93 Difference]: Finished difference Result 196 states and 285 transitions. [2022-02-24 01:45:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:00,126 INFO L225 Difference]: With dead ends: 196 [2022-02-24 01:45:00,126 INFO L226 Difference]: Without dead ends: 190 [2022-02-24 01:45:00,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:00,126 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:00,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 21 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-24 01:45:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2022-02-24 01:45:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-24 01:45:00,451 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 70 [2022-02-24 01:45:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:00,451 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-24 01:45:00,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-24 01:45:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:00,451 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:00,452 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:00,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408 [2022-02-24 01:45:00,452 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:00,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:00,452 INFO L85 PathProgramCache]: Analyzing trace with hash 126239858, now seen corresponding path program 407 times [2022-02-24 01:45:00,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:00,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259088811] [2022-02-24 01:45:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:00,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:00,453 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:00,453 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:00,453 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:00,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:00,845 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:00,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259088811] [2022-02-24 01:45:00,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259088811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:00,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:00,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:00,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546393212] [2022-02-24 01:45:00,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:00,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:00,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:00,846 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:01,952 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-24 01:45:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:01,953 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:01,953 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:45:01,953 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:45:01,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:01,954 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:01,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 29 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:45:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2022-02-24 01:45:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-24 01:45:02,307 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 70 [2022-02-24 01:45:02,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:02,307 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-24 01:45:02,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-24 01:45:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:02,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:02,308 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:02,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409 [2022-02-24 01:45:02,308 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:02,308 INFO L85 PathProgramCache]: Analyzing trace with hash 147246066, now seen corresponding path program 408 times [2022-02-24 01:45:02,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:02,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150858404] [2022-02-24 01:45:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:02,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:02,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:02,309 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:02,309 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:02,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:02,701 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:02,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150858404] [2022-02-24 01:45:02,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1150858404] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:02,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:02,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:02,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860352010] [2022-02-24 01:45:02,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:02,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:02,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:02,702 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:03,796 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:45:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:03,797 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:03,797 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:45:03,797 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:45:03,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:03,798 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:03,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 17 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:45:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:45:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 191. [2022-02-24 01:45:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-24 01:45:04,146 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 70 [2022-02-24 01:45:04,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:04,146 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-24 01:45:04,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:04,147 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-24 01:45:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:04,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:04,147 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:04,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410 [2022-02-24 01:45:04,147 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:04,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1140624526, now seen corresponding path program 409 times [2022-02-24 01:45:04,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:04,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208562021] [2022-02-24 01:45:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:04,148 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:04,148 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:04,148 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:04,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:04,540 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:04,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208562021] [2022-02-24 01:45:04,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1208562021] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:04,540 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:04,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:04,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998267185] [2022-02-24 01:45:04,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:04,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:04,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:04,541 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:05,673 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:45:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:05,674 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:45:05,674 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:45:05,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:05,674 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:05,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:45:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2022-02-24 01:45:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-24 01:45:06,030 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 70 [2022-02-24 01:45:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:06,030 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-24 01:45:06,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-24 01:45:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:06,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:06,031 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:06,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411 [2022-02-24 01:45:06,031 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1833682190, now seen corresponding path program 410 times [2022-02-24 01:45:06,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:06,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005967157] [2022-02-24 01:45:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:06,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:06,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:06,033 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:06,033 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:06,431 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:06,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005967157] [2022-02-24 01:45:06,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005967157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:06,431 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:06,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:06,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654473392] [2022-02-24 01:45:06,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:06,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:06,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:06,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:06,432 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:07,580 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:45:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:07,580 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:07,580 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:45:07,580 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:45:07,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:07,581 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:07,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:45:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 195. [2022-02-24 01:45:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-24 01:45:07,944 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 70 [2022-02-24 01:45:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:07,944 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-24 01:45:07,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-24 01:45:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:07,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:07,945 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:07,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412 [2022-02-24 01:45:07,945 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2142166414, now seen corresponding path program 411 times [2022-02-24 01:45:07,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:07,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312301976] [2022-02-24 01:45:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:07,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:07,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:07,946 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:07,946 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:08,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:08,341 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:08,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312301976] [2022-02-24 01:45:08,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1312301976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:08,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:08,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:08,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81251453] [2022-02-24 01:45:08,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:08,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:08,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:08,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:08,342 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:09,509 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:45:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:09,509 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:09,509 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:45:09,509 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:45:09,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:09,510 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:09,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:45:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 197. [2022-02-24 01:45:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-24 01:45:09,880 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 70 [2022-02-24 01:45:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:09,880 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-24 01:45:09,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-24 01:45:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:09,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:09,881 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:09,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413 [2022-02-24 01:45:09,881 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2052205042, now seen corresponding path program 412 times [2022-02-24 01:45:09,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:09,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114115146] [2022-02-24 01:45:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:09,884 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:09,885 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:09,885 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:10,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:10,279 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:10,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114115146] [2022-02-24 01:45:10,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1114115146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:10,279 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:10,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:10,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963304633] [2022-02-24 01:45:10,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:10,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:10,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:10,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:10,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:10,280 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:11,470 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:45:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:11,470 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:11,470 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:45:11,470 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:45:11,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:11,471 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:11,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:45:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 199. [2022-02-24 01:45:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-24 01:45:11,847 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 70 [2022-02-24 01:45:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:11,847 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-24 01:45:11,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-24 01:45:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:11,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:11,848 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:11,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414 [2022-02-24 01:45:11,848 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash -131116686, now seen corresponding path program 413 times [2022-02-24 01:45:11,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:11,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275920230] [2022-02-24 01:45:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:11,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:11,850 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:11,850 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:12,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:12,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:12,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275920230] [2022-02-24 01:45:12,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [275920230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:12,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:12,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:12,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058324022] [2022-02-24 01:45:12,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:12,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:12,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:12,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:12,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:12,263 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:13,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:13,483 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:45:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:13,483 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:13,483 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:45:13,484 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:45:13,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:13,484 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:13,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 31 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:45:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 201. [2022-02-24 01:45:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-24 01:45:13,868 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 70 [2022-02-24 01:45:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:13,868 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-24 01:45:13,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-24 01:45:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:13,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:13,868 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:13,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415 [2022-02-24 01:45:13,868 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:13,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1935710450, now seen corresponding path program 414 times [2022-02-24 01:45:13,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:13,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574883734] [2022-02-24 01:45:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:13,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:13,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:13,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:13,870 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:14,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:14,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:14,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574883734] [2022-02-24 01:45:14,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574883734] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:14,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:14,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:14,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253107959] [2022-02-24 01:45:14,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:14,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:14,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:14,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:14,263 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:15,501 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:45:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:15,501 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:15,501 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:45:15,501 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:45:15,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:15,502 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:15,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:45:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 203. [2022-02-24 01:45:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-24 01:45:15,893 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 70 [2022-02-24 01:45:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:15,893 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-24 01:45:15,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-24 01:45:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:15,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:15,893 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:15,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416 [2022-02-24 01:45:15,893 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:15,894 INFO L85 PathProgramCache]: Analyzing trace with hash -413269902, now seen corresponding path program 415 times [2022-02-24 01:45:15,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:15,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344372949] [2022-02-24 01:45:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:15,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:15,895 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:15,895 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:15,895 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:16,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:16,287 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:16,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344372949] [2022-02-24 01:45:16,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344372949] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:16,287 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:16,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:16,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852719117] [2022-02-24 01:45:16,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:16,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:16,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:16,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:16,288 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:17,548 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:45:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:17,549 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:45:17,549 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:45:17,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:17,549 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:17,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:45:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 205. [2022-02-24 01:45:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-24 01:45:17,950 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 70 [2022-02-24 01:45:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:17,950 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-24 01:45:17,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-24 01:45:17,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:17,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:17,951 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:17,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417 [2022-02-24 01:45:17,951 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:17,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1369409522, now seen corresponding path program 416 times [2022-02-24 01:45:17,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:17,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339630164] [2022-02-24 01:45:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:17,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:17,952 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:17,952 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:17,953 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:18,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:18,351 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:18,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339630164] [2022-02-24 01:45:18,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [339630164] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:18,351 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:18,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:18,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814872388] [2022-02-24 01:45:18,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:18,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:18,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:18,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:18,352 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:19,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:19,638 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:45:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:19,638 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:19,639 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:45:19,639 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:45:19,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:19,639 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:19,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:45:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 207. [2022-02-24 01:45:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-24 01:45:20,046 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 70 [2022-02-24 01:45:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:20,046 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-24 01:45:20,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:20,046 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-24 01:45:20,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:20,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:20,046 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:20,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418 [2022-02-24 01:45:20,047 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash 832384882, now seen corresponding path program 417 times [2022-02-24 01:45:20,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:20,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488288314] [2022-02-24 01:45:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:20,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:20,048 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:20,048 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:20,048 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:20,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:20,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:20,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488288314] [2022-02-24 01:45:20,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [488288314] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:20,444 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:20,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:20,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649449545] [2022-02-24 01:45:20,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:20,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:20,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:20,444 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:21,748 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:45:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:21,749 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:21,749 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:45:21,749 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:45:21,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:21,750 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:21,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:45:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2022-02-24 01:45:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-24 01:45:22,168 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 70 [2022-02-24 01:45:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:22,168 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-24 01:45:22,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:22,168 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-24 01:45:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:22,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:22,169 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:22,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419 [2022-02-24 01:45:22,169 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:22,169 INFO L85 PathProgramCache]: Analyzing trace with hash 147781362, now seen corresponding path program 418 times [2022-02-24 01:45:22,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:22,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022153159] [2022-02-24 01:45:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:22,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:22,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:22,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:22,171 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:22,567 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:22,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022153159] [2022-02-24 01:45:22,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022153159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:22,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:22,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:22,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535454255] [2022-02-24 01:45:22,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:22,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:22,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:22,568 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:23,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:23,895 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:45:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:23,896 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:23,896 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:45:23,896 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:45:23,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:23,896 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:23,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:45:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 211. [2022-02-24 01:45:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-24 01:45:24,322 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 70 [2022-02-24 01:45:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:24,322 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-24 01:45:24,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-24 01:45:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:24,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:24,322 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:24,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420 [2022-02-24 01:45:24,322 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash -626205070, now seen corresponding path program 419 times [2022-02-24 01:45:24,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:24,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370052587] [2022-02-24 01:45:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:24,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:24,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:24,324 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:24,324 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:24,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:24,739 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:24,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370052587] [2022-02-24 01:45:24,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370052587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:24,740 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:24,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:24,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651668412] [2022-02-24 01:45:24,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:24,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:24,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:24,740 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:26,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:26,084 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:45:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:26,085 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:26,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:26,085 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:45:26,085 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:45:26,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:26,085 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:26,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:26,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:45:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 213. [2022-02-24 01:45:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-24 01:45:26,525 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 70 [2022-02-24 01:45:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:26,525 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-24 01:45:26,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-24 01:45:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:26,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:26,525 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:26,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421 [2022-02-24 01:45:26,525 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:26,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:26,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1397824014, now seen corresponding path program 420 times [2022-02-24 01:45:26,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:26,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766221500] [2022-02-24 01:45:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:26,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:26,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:26,527 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:26,527 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:26,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:26,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:26,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766221500] [2022-02-24 01:45:26,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [766221500] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:26,925 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:26,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:26,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007601536] [2022-02-24 01:45:26,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:26,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:26,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:26,926 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:28,292 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:45:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:28,293 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:28,293 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:45:28,293 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:45:28,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:28,293 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:28,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:45:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 215. [2022-02-24 01:45:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-24 01:45:28,734 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 70 [2022-02-24 01:45:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:28,735 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-24 01:45:28,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-24 01:45:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:28,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:28,735 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:28,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422 [2022-02-24 01:45:28,735 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:28,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:28,735 INFO L85 PathProgramCache]: Analyzing trace with hash 105713010, now seen corresponding path program 421 times [2022-02-24 01:45:28,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:28,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108157629] [2022-02-24 01:45:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:28,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:28,737 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:28,737 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:28,737 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:29,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:29,128 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:29,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108157629] [2022-02-24 01:45:29,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108157629] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:29,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:29,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:29,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910800751] [2022-02-24 01:45:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:29,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:29,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:29,129 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:30,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:30,530 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:45:30,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:30,531 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:30,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:30,531 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:45:30,531 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:45:30,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:30,531 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:30,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:45:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 217. [2022-02-24 01:45:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-24 01:45:30,983 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 70 [2022-02-24 01:45:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:30,984 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-24 01:45:30,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-24 01:45:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:30,984 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:30,984 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:30,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423 [2022-02-24 01:45:30,984 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1895781618, now seen corresponding path program 422 times [2022-02-24 01:45:30,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:30,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650516337] [2022-02-24 01:45:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:30,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:30,986 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:30,986 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:31,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:31,381 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:31,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650516337] [2022-02-24 01:45:31,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [650516337] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:31,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:31,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:31,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862106495] [2022-02-24 01:45:31,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:31,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:31,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:31,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:31,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:31,382 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:32,789 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-24 01:45:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:32,790 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:32,790 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:45:32,790 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:45:32,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:32,791 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:32,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:45:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 219. [2022-02-24 01:45:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-24 01:45:33,252 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 70 [2022-02-24 01:45:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:33,252 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-24 01:45:33,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-24 01:45:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:33,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:33,252 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:33,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424 [2022-02-24 01:45:33,252 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash -130171790, now seen corresponding path program 423 times [2022-02-24 01:45:33,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:33,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91465802] [2022-02-24 01:45:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:33,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:33,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:33,254 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:33,254 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:33,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:33,657 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:33,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91465802] [2022-02-24 01:45:33,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [91465802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:33,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:33,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:33,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774666773] [2022-02-24 01:45:33,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:33,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:33,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:33,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:33,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:33,658 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:35,097 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-24 01:45:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:35,098 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:45:35,098 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:45:35,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:35,098 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:35,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 24 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:45:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 221. [2022-02-24 01:45:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-24 01:45:35,580 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 70 [2022-02-24 01:45:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:35,580 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-24 01:45:35,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-24 01:45:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:35,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:35,581 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:35,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425 [2022-02-24 01:45:35,581 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1451211790, now seen corresponding path program 424 times [2022-02-24 01:45:35,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:35,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982220002] [2022-02-24 01:45:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:35,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:35,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:35,582 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:35,582 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:35,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:35,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:35,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982220002] [2022-02-24 01:45:35,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [982220002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:35,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:35,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:35,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585688002] [2022-02-24 01:45:35,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:35,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:35,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:35,979 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:37,423 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-24 01:45:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:37,423 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:37,424 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:45:37,424 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 01:45:37,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:37,424 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:37,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 01:45:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 223. [2022-02-24 01:45:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-24 01:45:37,901 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 70 [2022-02-24 01:45:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:37,902 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-24 01:45:37,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-24 01:45:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:37,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:37,902 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:37,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426 [2022-02-24 01:45:37,902 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:37,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash 339667826, now seen corresponding path program 425 times [2022-02-24 01:45:37,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:37,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226775224] [2022-02-24 01:45:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:37,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:37,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:37,904 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:37,904 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:38,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:38,296 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:38,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226775224] [2022-02-24 01:45:38,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [226775224] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:38,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:38,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:38,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927796857] [2022-02-24 01:45:38,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:38,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:38,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:38,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:38,297 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:39,766 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-24 01:45:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:39,767 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:39,767 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:45:39,767 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:45:39,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:39,768 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:39,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:45:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 225. [2022-02-24 01:45:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-24 01:45:40,246 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 70 [2022-02-24 01:45:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:40,246 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-24 01:45:40,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-24 01:45:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:40,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:40,246 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:40,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427 [2022-02-24 01:45:40,247 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:40,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash -906906894, now seen corresponding path program 426 times [2022-02-24 01:45:40,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:40,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760637096] [2022-02-24 01:45:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:40,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:40,248 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:40,248 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:40,248 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:40,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:40,643 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:40,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760637096] [2022-02-24 01:45:40,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760637096] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:40,643 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:40,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:40,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193885920] [2022-02-24 01:45:40,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:40,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:40,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:40,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:40,644 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:42,134 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-24 01:45:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:42,135 INFO L225 Difference]: With dead ends: 314 [2022-02-24 01:45:42,135 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:45:42,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:42,136 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:42,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:45:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 227. [2022-02-24 01:45:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-24 01:45:42,620 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 70 [2022-02-24 01:45:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:42,620 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-24 01:45:42,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-24 01:45:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:42,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:42,621 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:42,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428 [2022-02-24 01:45:42,621 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash -569337230, now seen corresponding path program 427 times [2022-02-24 01:45:42,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:42,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092363096] [2022-02-24 01:45:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:42,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:42,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:42,623 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:42,623 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:43,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:43,014 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:43,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092363096] [2022-02-24 01:45:43,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092363096] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:43,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:43,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:43,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703082364] [2022-02-24 01:45:43,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:43,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:43,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:43,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:43,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:43,015 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:44,520 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-24 01:45:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:44,520 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:44,520 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:45:44,520 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 01:45:44,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:44,521 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:44,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 27 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 01:45:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 229. [2022-02-24 01:45:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-24 01:45:45,007 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 70 [2022-02-24 01:45:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:45,007 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-24 01:45:45,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-24 01:45:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:45,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:45,008 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:45,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429 [2022-02-24 01:45:45,008 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:45,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1712562674, now seen corresponding path program 428 times [2022-02-24 01:45:45,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:45,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008256019] [2022-02-24 01:45:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:45,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:45,009 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:45,009 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:45,010 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:45,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:45,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:45,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008256019] [2022-02-24 01:45:45,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2008256019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:45,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:45,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:45,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826731187] [2022-02-24 01:45:45,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:45,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:45,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:45,402 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:46,913 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-24 01:45:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:46,913 INFO L225 Difference]: With dead ends: 326 [2022-02-24 01:45:46,913 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 01:45:46,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:46,914 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:46,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 01:45:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 231. [2022-02-24 01:45:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-24 01:45:47,406 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 70 [2022-02-24 01:45:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:47,406 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-24 01:45:47,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-24 01:45:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:47,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:47,406 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:47,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430 [2022-02-24 01:45:47,406 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash -109917838, now seen corresponding path program 429 times [2022-02-24 01:45:47,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:47,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563332341] [2022-02-24 01:45:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:47,408 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:47,408 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:47,408 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:47,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:47,804 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:47,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563332341] [2022-02-24 01:45:47,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563332341] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:47,804 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:47,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:47,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126034555] [2022-02-24 01:45:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:47,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:47,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:47,805 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:49,349 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-24 01:45:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:49,350 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:49,350 INFO L225 Difference]: With dead ends: 332 [2022-02-24 01:45:49,350 INFO L226 Difference]: Without dead ends: 326 [2022-02-24 01:45:49,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:49,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:49,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 27 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:45:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-24 01:45:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 233. [2022-02-24 01:45:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-24 01:45:49,852 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 70 [2022-02-24 01:45:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:49,852 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-24 01:45:49,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-24 01:45:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:49,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:49,852 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:49,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431 [2022-02-24 01:45:49,852 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash 832966898, now seen corresponding path program 430 times [2022-02-24 01:45:49,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:49,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036082137] [2022-02-24 01:45:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:49,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:49,854 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:49,854 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:50,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:50,240 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:50,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036082137] [2022-02-24 01:45:50,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036082137] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:50,240 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:50,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:50,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297502663] [2022-02-24 01:45:50,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:50,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:50,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:50,241 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:51,715 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-24 01:45:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:51,716 INFO L225 Difference]: With dead ends: 338 [2022-02-24 01:45:51,716 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 01:45:51,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:51,716 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:51,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:45:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 01:45:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 235. [2022-02-24 01:45:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-02-24 01:45:52,186 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 70 [2022-02-24 01:45:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:52,186 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-02-24 01:45:52,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-02-24 01:45:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:52,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:52,187 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:52,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable432 [2022-02-24 01:45:52,187 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:52,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:52,187 INFO L85 PathProgramCache]: Analyzing trace with hash 707098738, now seen corresponding path program 431 times [2022-02-24 01:45:52,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:52,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46891162] [2022-02-24 01:45:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:52,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:52,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:52,188 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:52,188 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:52,573 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:52,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46891162] [2022-02-24 01:45:52,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [46891162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:52,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:52,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:52,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627486578] [2022-02-24 01:45:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:52,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:52,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:52,574 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:54,071 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-24 01:45:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:54,072 INFO L225 Difference]: With dead ends: 344 [2022-02-24 01:45:54,072 INFO L226 Difference]: Without dead ends: 338 [2022-02-24 01:45:54,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:54,072 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:54,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:45:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-24 01:45:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 237. [2022-02-24 01:45:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-02-24 01:45:54,551 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 70 [2022-02-24 01:45:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:54,551 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-02-24 01:45:54,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-02-24 01:45:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:54,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:54,552 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:54,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable433 [2022-02-24 01:45:54,552 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 6881266, now seen corresponding path program 432 times [2022-02-24 01:45:54,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:54,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119352948] [2022-02-24 01:45:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:54,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:54,553 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:54,553 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:54,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:54,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:54,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119352948] [2022-02-24 01:45:54,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119352948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:54,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:54,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:54,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870671195] [2022-02-24 01:45:54,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:54,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:54,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:54,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:54,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:54,938 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:56,422 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-02-24 01:45:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:56,422 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:56,423 INFO L225 Difference]: With dead ends: 350 [2022-02-24 01:45:56,423 INFO L226 Difference]: Without dead ends: 344 [2022-02-24 01:45:56,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:56,423 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:56,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:45:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-24 01:45:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 239. [2022-02-24 01:45:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-02-24 01:45:56,913 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 70 [2022-02-24 01:45:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:56,913 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-02-24 01:45:56,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-02-24 01:45:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:56,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:56,914 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:56,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434 [2022-02-24 01:45:56,914 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1407756146, now seen corresponding path program 433 times [2022-02-24 01:45:56,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:56,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894937824] [2022-02-24 01:45:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:56,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:56,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:56,915 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:56,915 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:57,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:57,305 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:57,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894937824] [2022-02-24 01:45:57,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894937824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:57,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:57,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:57,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486738617] [2022-02-24 01:45:57,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:57,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:57,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:57,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:57,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:57,306 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:58,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:45:58,799 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-02-24 01:45:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:45:58,799 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:45:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:45:58,800 INFO L225 Difference]: With dead ends: 356 [2022-02-24 01:45:58,800 INFO L226 Difference]: Without dead ends: 350 [2022-02-24 01:45:58,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:45:58,800 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:45:58,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:45:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-24 01:45:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 241. [2022-02-24 01:45:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-02-24 01:45:59,285 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 70 [2022-02-24 01:45:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:45:59,285 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-02-24 01:45:59,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:45:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-02-24 01:45:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:45:59,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:45:59,285 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:45:59,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2022-02-24 01:45:59,286 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:45:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:45:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash -971215118, now seen corresponding path program 434 times [2022-02-24 01:45:59,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:45:59,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218294593] [2022-02-24 01:45:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:45:59,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:45:59,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:45:59,287 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:45:59,287 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:45:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:59,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:45:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:45:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:45:59,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:45:59,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218294593] [2022-02-24 01:45:59,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218294593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:45:59,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:45:59,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:45:59,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193227768] [2022-02-24 01:45:59,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:45:59,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:45:59,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:45:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:45:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:45:59,694 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:01,039 INFO L93 Difference]: Finished difference Result 304 states and 446 transitions. [2022-02-24 01:46:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:46:01,040 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:46:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:01,040 INFO L225 Difference]: With dead ends: 304 [2022-02-24 01:46:01,040 INFO L226 Difference]: Without dead ends: 298 [2022-02-24 01:46:01,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:46:01,040 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:01,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 22 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:46:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-24 01:46:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 187. [2022-02-24 01:46:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-24 01:46:01,364 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 70 [2022-02-24 01:46:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:01,364 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-24 01:46:01,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-24 01:46:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:01,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:01,364 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:01,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436 [2022-02-24 01:46:01,364 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1519752747, now seen corresponding path program 435 times [2022-02-24 01:46:01,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:01,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467631534] [2022-02-24 01:46:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:01,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:01,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:01,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:01,366 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:01,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:01,774 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:01,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467631534] [2022-02-24 01:46:01,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467631534] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:01,774 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:01,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:01,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949383521] [2022-02-24 01:46:01,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:01,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:01,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:01,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:01,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:01,775 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:02,886 INFO L93 Difference]: Finished difference Result 202 states and 294 transitions. [2022-02-24 01:46:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:02,886 INFO L225 Difference]: With dead ends: 202 [2022-02-24 01:46:02,886 INFO L226 Difference]: Without dead ends: 196 [2022-02-24 01:46:02,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:02,887 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:02,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 19 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:46:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-24 01:46:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2022-02-24 01:46:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-24 01:46:03,216 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 72 [2022-02-24 01:46:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:03,216 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-24 01:46:03,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-24 01:46:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:03,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:03,216 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:03,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437 [2022-02-24 01:46:03,216 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1680265557, now seen corresponding path program 436 times [2022-02-24 01:46:03,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:03,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805409284] [2022-02-24 01:46:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:03,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:03,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:03,218 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:03,218 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:03,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:03,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:03,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805409284] [2022-02-24 01:46:03,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [805409284] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:03,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:03,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:03,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840512908] [2022-02-24 01:46:03,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:03,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:03,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:03,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:03,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:03,627 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:04,761 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-24 01:46:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:04,761 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:04,761 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:46:04,761 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:46:04,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:04,762 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:04,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:46:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2022-02-24 01:46:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-24 01:46:05,108 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 72 [2022-02-24 01:46:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:05,108 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-24 01:46:05,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-24 01:46:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:05,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:05,108 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:05,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438 [2022-02-24 01:46:05,108 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1701271765, now seen corresponding path program 437 times [2022-02-24 01:46:05,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:05,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309322067] [2022-02-24 01:46:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:05,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:05,110 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:05,110 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:05,110 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:05,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:05,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:05,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309322067] [2022-02-24 01:46:05,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1309322067] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:05,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:05,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:05,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441195762] [2022-02-24 01:46:05,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:05,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:05,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:05,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:05,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:05,522 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:06,669 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:46:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:06,669 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:06,670 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:46:06,670 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:46:06,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:06,670 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:06,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:46:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 197. [2022-02-24 01:46:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-24 01:46:07,027 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 72 [2022-02-24 01:46:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:07,027 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-24 01:46:07,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-24 01:46:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:07,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:07,028 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:07,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439 [2022-02-24 01:46:07,028 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:07,028 INFO L85 PathProgramCache]: Analyzing trace with hash 413401173, now seen corresponding path program 438 times [2022-02-24 01:46:07,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:07,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623308608] [2022-02-24 01:46:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:07,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:07,029 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:07,029 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:07,030 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:07,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:07,442 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:07,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623308608] [2022-02-24 01:46:07,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [623308608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:07,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:07,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:07,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751935130] [2022-02-24 01:46:07,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:07,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:07,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:07,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:07,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:07,442 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:08,598 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:46:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:08,598 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:08,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:08,598 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:46:08,598 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:46:08,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:08,599 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:08,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:46:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2022-02-24 01:46:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-24 01:46:08,964 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 72 [2022-02-24 01:46:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:08,964 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-24 01:46:08,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-24 01:46:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:08,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:08,964 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:08,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440 [2022-02-24 01:46:08,964 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash -279656491, now seen corresponding path program 439 times [2022-02-24 01:46:08,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:08,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793653416] [2022-02-24 01:46:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:08,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:08,966 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:08,966 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:09,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:09,374 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:09,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793653416] [2022-02-24 01:46:09,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [793653416] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:09,374 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:09,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:09,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068895092] [2022-02-24 01:46:09,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:09,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:09,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:09,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:09,375 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:10,555 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:46:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:10,555 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:10,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:10,555 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:46:10,555 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:46:10,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:10,556 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:10,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 27 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:46:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 201. [2022-02-24 01:46:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-24 01:46:10,927 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 72 [2022-02-24 01:46:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:10,927 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-24 01:46:10,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-24 01:46:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:10,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:10,928 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:10,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441 [2022-02-24 01:46:10,928 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash -588140715, now seen corresponding path program 440 times [2022-02-24 01:46:10,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:10,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477469253] [2022-02-24 01:46:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:10,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:10,929 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:10,929 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:11,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:11,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:11,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477469253] [2022-02-24 01:46:11,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477469253] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:11,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:11,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:11,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095330435] [2022-02-24 01:46:11,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:11,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:11,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:11,340 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:12,542 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:46:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:12,543 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:46:12,543 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:46:12,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:12,543 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:12,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:46:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 203. [2022-02-24 01:46:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-24 01:46:12,923 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 72 [2022-02-24 01:46:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:12,923 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-24 01:46:12,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:12,923 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-24 01:46:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:12,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:12,924 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:12,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442 [2022-02-24 01:46:12,924 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:12,924 INFO L85 PathProgramCache]: Analyzing trace with hash -688736555, now seen corresponding path program 441 times [2022-02-24 01:46:12,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:12,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816354748] [2022-02-24 01:46:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:12,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:12,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:12,925 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:12,925 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:13,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:13,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:13,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816354748] [2022-02-24 01:46:13,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [816354748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:13,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:13,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:13,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009777212] [2022-02-24 01:46:13,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:13,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:13,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:13,358 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:14,630 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:46:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:14,631 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:14,631 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:46:14,631 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:46:14,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:14,632 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:14,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:14,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:46:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 205. [2022-02-24 01:46:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-24 01:46:15,048 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 72 [2022-02-24 01:46:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:15,049 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-24 01:46:15,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-24 01:46:15,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:15,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:15,049 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:15,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443 [2022-02-24 01:46:15,049 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:15,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1422909013, now seen corresponding path program 442 times [2022-02-24 01:46:15,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:15,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056292820] [2022-02-24 01:46:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:15,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:15,051 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:15,051 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:15,051 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:15,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:15,465 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:15,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056292820] [2022-02-24 01:46:15,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1056292820] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:15,465 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:15,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:15,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621960548] [2022-02-24 01:46:15,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:15,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:15,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:15,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:15,466 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:16,768 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:46:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:16,769 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:46:16,769 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:46:16,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:16,769 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:16,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:46:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 207. [2022-02-24 01:46:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-24 01:46:17,199 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 72 [2022-02-24 01:46:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:17,199 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-24 01:46:17,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-24 01:46:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:17,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:17,200 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:17,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444 [2022-02-24 01:46:17,200 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash -805231147, now seen corresponding path program 443 times [2022-02-24 01:46:17,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:17,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74773726] [2022-02-24 01:46:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:17,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:17,201 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:17,201 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:17,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:17,621 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:17,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74773726] [2022-02-24 01:46:17,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [74773726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:17,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:17,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:17,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174885847] [2022-02-24 01:46:17,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:17,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:17,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:17,622 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:18,954 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:46:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:18,954 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:46:18,955 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:46:18,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:18,955 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:18,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:46:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 209. [2022-02-24 01:46:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-24 01:46:19,391 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 72 [2022-02-24 01:46:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:19,391 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-24 01:46:19,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-24 01:46:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:19,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:19,391 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:19,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445 [2022-02-24 01:46:19,392 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1140755797, now seen corresponding path program 444 times [2022-02-24 01:46:19,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:19,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940411640] [2022-02-24 01:46:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:19,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:19,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:19,393 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:19,393 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:19,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:19,810 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:19,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940411640] [2022-02-24 01:46:19,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [940411640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:19,810 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:19,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:19,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622328796] [2022-02-24 01:46:19,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:19,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:19,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:19,811 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:21,167 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:46:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:21,167 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:21,168 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:46:21,168 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:46:21,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:21,168 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:21,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:46:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 211. [2022-02-24 01:46:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-24 01:46:21,623 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 72 [2022-02-24 01:46:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:21,623 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-24 01:46:21,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-24 01:46:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:21,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:21,623 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:21,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446 [2022-02-24 01:46:21,624 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1371532075, now seen corresponding path program 445 times [2022-02-24 01:46:21,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:21,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021653308] [2022-02-24 01:46:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:21,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:21,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:21,625 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:21,625 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:22,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:22,053 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:22,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021653308] [2022-02-24 01:46:22,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2021653308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:22,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:22,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:22,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121435994] [2022-02-24 01:46:22,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:22,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:22,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:22,054 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:23,438 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:46:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:23,438 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:23,439 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:46:23,439 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:46:23,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:23,439 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:23,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:46:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 213. [2022-02-24 01:46:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-24 01:46:23,894 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 72 [2022-02-24 01:46:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:23,894 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-24 01:46:23,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-24 01:46:23,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:23,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:23,895 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:23,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447 [2022-02-24 01:46:23,895 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:23,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:23,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1908556715, now seen corresponding path program 446 times [2022-02-24 01:46:23,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:23,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643662540] [2022-02-24 01:46:23,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:23,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:23,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:23,897 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:23,897 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:24,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:24,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:24,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643662540] [2022-02-24 01:46:24,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1643662540] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:24,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:24,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:24,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962441686] [2022-02-24 01:46:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:24,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:24,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:24,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:24,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:24,321 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:25,719 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:46:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:25,720 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:46:25,720 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:46:25,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:25,721 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:25,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:46:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 215. [2022-02-24 01:46:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-24 01:46:26,188 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 72 [2022-02-24 01:46:26,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:26,188 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-24 01:46:26,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-24 01:46:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:26,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:26,189 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:26,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448 [2022-02-24 01:46:26,189 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:26,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1701807061, now seen corresponding path program 447 times [2022-02-24 01:46:26,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:26,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630203643] [2022-02-24 01:46:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:26,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:26,190 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:26,190 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:26,190 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:26,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:26,610 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:26,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630203643] [2022-02-24 01:46:26,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630203643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:26,610 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:26,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:26,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970329588] [2022-02-24 01:46:26,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:26,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:26,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:26,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:26,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:26,611 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:28,028 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:46:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:28,029 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:46:28,029 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:46:28,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:28,029 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:28,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:46:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 217. [2022-02-24 01:46:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-24 01:46:28,506 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 72 [2022-02-24 01:46:28,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:28,506 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-24 01:46:28,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-24 01:46:28,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:28,507 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:28,507 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:28,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449 [2022-02-24 01:46:28,507 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:28,507 INFO L85 PathProgramCache]: Analyzing trace with hash 927820629, now seen corresponding path program 448 times [2022-02-24 01:46:28,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:28,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043502622] [2022-02-24 01:46:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:28,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:28,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:28,508 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:28,508 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:28,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:28,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:28,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043502622] [2022-02-24 01:46:28,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043502622] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:28,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:28,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:28,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018584079] [2022-02-24 01:46:28,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:28,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:28,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:28,947 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:30,388 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:46:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:30,389 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:46:30,389 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:46:30,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:30,389 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:30,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:46:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 219. [2022-02-24 01:46:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-24 01:46:30,868 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 72 [2022-02-24 01:46:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:30,868 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-24 01:46:30,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-24 01:46:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:30,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:30,869 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:30,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450 [2022-02-24 01:46:30,869 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash 156201685, now seen corresponding path program 449 times [2022-02-24 01:46:30,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:30,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384571487] [2022-02-24 01:46:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:30,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:30,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:30,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:30,871 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:31,287 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:31,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384571487] [2022-02-24 01:46:31,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [384571487] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:31,287 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:31,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:31,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898512553] [2022-02-24 01:46:31,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:31,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:31,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:31,288 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:32,751 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:46:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:32,751 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:32,751 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:46:32,751 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:46:32,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:32,752 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:32,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:46:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 221. [2022-02-24 01:46:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-24 01:46:33,239 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 72 [2022-02-24 01:46:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:33,239 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-24 01:46:33,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-24 01:46:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:33,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:33,240 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:33,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451 [2022-02-24 01:46:33,240 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1659738709, now seen corresponding path program 450 times [2022-02-24 01:46:33,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:33,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374263105] [2022-02-24 01:46:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:33,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:33,241 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:33,241 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:33,241 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:33,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:33,657 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:33,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374263105] [2022-02-24 01:46:33,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [374263105] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:33,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:33,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:33,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168413205] [2022-02-24 01:46:33,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:33,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:33,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:33,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:33,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:33,658 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:35,146 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-24 01:46:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:35,146 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:46:35,146 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:46:35,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:35,147 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:35,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:46:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 223. [2022-02-24 01:46:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-24 01:46:35,643 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 72 [2022-02-24 01:46:35,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:35,643 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-24 01:46:35,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-24 01:46:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:35,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:35,644 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:35,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452 [2022-02-24 01:46:35,644 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash -845159979, now seen corresponding path program 451 times [2022-02-24 01:46:35,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:35,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020316981] [2022-02-24 01:46:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:35,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:35,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:35,645 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:35,645 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:36,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:36,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:36,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020316981] [2022-02-24 01:46:36,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020316981] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:36,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:36,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:36,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729669805] [2022-02-24 01:46:36,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:36,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:36,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:36,108 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:37,629 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-24 01:46:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:37,629 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:37,629 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:46:37,629 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:46:37,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:37,630 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:37,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:46:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 225. [2022-02-24 01:46:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-24 01:46:38,130 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 72 [2022-02-24 01:46:38,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:38,130 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-24 01:46:38,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-24 01:46:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:38,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:38,131 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:38,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453 [2022-02-24 01:46:38,131 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1423853909, now seen corresponding path program 452 times [2022-02-24 01:46:38,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:38,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676750079] [2022-02-24 01:46:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:38,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:38,132 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:38,132 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:38,132 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:38,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:38,549 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:38,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676750079] [2022-02-24 01:46:38,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [676750079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:38,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:38,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:38,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941504203] [2022-02-24 01:46:38,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:38,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:38,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:38,550 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:40,086 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-24 01:46:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:40,087 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:46:40,087 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 01:46:40,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:40,087 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:40,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 01:46:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 227. [2022-02-24 01:46:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-24 01:46:40,603 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 72 [2022-02-24 01:46:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:40,604 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-24 01:46:40,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-24 01:46:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:40,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:40,604 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:40,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454 [2022-02-24 01:46:40,604 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash 102813909, now seen corresponding path program 453 times [2022-02-24 01:46:40,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:40,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473991017] [2022-02-24 01:46:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:40,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:40,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:40,606 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:40,606 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:41,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:41,031 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:41,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473991017] [2022-02-24 01:46:41,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [473991017] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:41,031 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:41,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:41,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292988419] [2022-02-24 01:46:41,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:41,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:41,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:41,032 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:42,590 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-24 01:46:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:42,590 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:42,590 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:46:42,590 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:46:42,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:42,591 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:42,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:46:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 229. [2022-02-24 01:46:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-24 01:46:43,114 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 72 [2022-02-24 01:46:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:43,114 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-24 01:46:43,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-24 01:46:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:43,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:43,115 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:43,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable455 [2022-02-24 01:46:43,115 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:43,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1893693525, now seen corresponding path program 454 times [2022-02-24 01:46:43,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:43,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877125503] [2022-02-24 01:46:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:43,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:43,116 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:43,116 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:43,116 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:43,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:43,536 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:43,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877125503] [2022-02-24 01:46:43,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [877125503] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:43,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:43,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:43,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689032946] [2022-02-24 01:46:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:43,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:43,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:43,537 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:45,106 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-24 01:46:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:45,106 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:45,106 INFO L225 Difference]: With dead ends: 314 [2022-02-24 01:46:45,106 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:46:45,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:45,107 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:45,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 27 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:46:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 231. [2022-02-24 01:46:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-24 01:46:45,632 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 72 [2022-02-24 01:46:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:45,632 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-24 01:46:45,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-24 01:46:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:45,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:45,632 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:45,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456 [2022-02-24 01:46:45,633 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash 647118805, now seen corresponding path program 455 times [2022-02-24 01:46:45,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:45,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116196578] [2022-02-24 01:46:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:45,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:45,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:45,635 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:45,635 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:46,051 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:46,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116196578] [2022-02-24 01:46:46,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [116196578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:46,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:46,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:46,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5510704] [2022-02-24 01:46:46,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:46,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:46,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:46,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:46,052 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:47,640 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-24 01:46:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:47,641 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:47,641 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:46:47,641 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 01:46:47,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:47,642 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:47,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 01:46:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 233. [2022-02-24 01:46:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-24 01:46:48,191 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 72 [2022-02-24 01:46:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:48,191 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-24 01:46:48,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-24 01:46:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:48,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:48,192 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:48,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457 [2022-02-24 01:46:48,192 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:48,192 INFO L85 PathProgramCache]: Analyzing trace with hash 984688469, now seen corresponding path program 456 times [2022-02-24 01:46:48,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:48,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753578902] [2022-02-24 01:46:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:48,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:48,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:48,193 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:48,193 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:48,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:48,611 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:48,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753578902] [2022-02-24 01:46:48,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [753578902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:48,611 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:48,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:48,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741508181] [2022-02-24 01:46:48,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:48,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:48,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:48,612 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:50,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:50,220 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-24 01:46:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:50,220 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:50,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:50,221 INFO L225 Difference]: With dead ends: 326 [2022-02-24 01:46:50,221 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 01:46:50,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:50,221 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:50,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 01:46:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 235. [2022-02-24 01:46:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-02-24 01:46:50,767 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 72 [2022-02-24 01:46:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:50,767 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-02-24 01:46:50,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-02-24 01:46:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:50,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:50,767 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:50,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458 [2022-02-24 01:46:50,768 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:50,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:50,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1028378923, now seen corresponding path program 457 times [2022-02-24 01:46:50,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:50,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524057077] [2022-02-24 01:46:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:50,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:50,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:50,769 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:50,769 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:51,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:51,183 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:51,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524057077] [2022-02-24 01:46:51,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524057077] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:51,184 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:51,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:51,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118677408] [2022-02-24 01:46:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:51,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:51,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:51,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:51,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:51,184 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:52,814 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-24 01:46:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:52,815 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:52,815 INFO L225 Difference]: With dead ends: 332 [2022-02-24 01:46:52,815 INFO L226 Difference]: Without dead ends: 326 [2022-02-24 01:46:52,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:52,816 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:52,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-24 01:46:53,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 237. [2022-02-24 01:46:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-02-24 01:46:53,364 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 72 [2022-02-24 01:46:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:53,364 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-02-24 01:46:53,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-02-24 01:46:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:53,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:53,365 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:53,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459 [2022-02-24 01:46:53,365 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1444107861, now seen corresponding path program 458 times [2022-02-24 01:46:53,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:53,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419223688] [2022-02-24 01:46:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:53,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:53,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:53,366 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:53,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:53,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:53,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419223688] [2022-02-24 01:46:53,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [419223688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:53,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:53,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:53,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649467231] [2022-02-24 01:46:53,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:53,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:53,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:53,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:53,783 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:55,434 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-24 01:46:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:55,435 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:55,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:55,436 INFO L225 Difference]: With dead ends: 338 [2022-02-24 01:46:55,436 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 01:46:55,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:55,436 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:55,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 01:46:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 239. [2022-02-24 01:46:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-02-24 01:46:55,991 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 72 [2022-02-24 01:46:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:55,991 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-02-24 01:46:55,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-02-24 01:46:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:55,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:55,991 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:55,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460 [2022-02-24 01:46:55,992 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:55,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1907974699, now seen corresponding path program 459 times [2022-02-24 01:46:55,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:55,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642020283] [2022-02-24 01:46:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:55,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:55,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:55,994 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:55,994 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:56,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:56,434 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:56,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642020283] [2022-02-24 01:46:56,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [642020283] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:56,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:56,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:56,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122049279] [2022-02-24 01:46:56,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:56,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:56,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:56,436 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:46:58,086 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-24 01:46:58,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:46:58,086 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:46:58,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:46:58,086 INFO L225 Difference]: With dead ends: 344 [2022-02-24 01:46:58,086 INFO L226 Difference]: Without dead ends: 338 [2022-02-24 01:46:58,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:46:58,087 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:46:58,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:46:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-24 01:46:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 241. [2022-02-24 01:46:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-02-24 01:46:58,648 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 72 [2022-02-24 01:46:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:46:58,648 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-02-24 01:46:58,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:46:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-02-24 01:46:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:46:58,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:46:58,648 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:46:58,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461 [2022-02-24 01:46:58,648 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:46:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:46:58,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2033842859, now seen corresponding path program 460 times [2022-02-24 01:46:58,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:46:58,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335472353] [2022-02-24 01:46:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:46:58,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:46:58,650 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:46:58,650 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:46:58,650 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:46:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:59,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:46:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:46:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:46:59,065 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:46:59,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335472353] [2022-02-24 01:46:59,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1335472353] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:46:59,065 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:46:59,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:46:59,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534976786] [2022-02-24 01:46:59,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:46:59,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:46:59,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:46:59,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:46:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:46:59,066 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:00,729 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-02-24 01:47:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:47:00,729 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:47:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:00,730 INFO L225 Difference]: With dead ends: 350 [2022-02-24 01:47:00,730 INFO L226 Difference]: Without dead ends: 344 [2022-02-24 01:47:00,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:47:00,730 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:00,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-24 01:47:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 243. [2022-02-24 01:47:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-02-24 01:47:01,294 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 72 [2022-02-24 01:47:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:01,294 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-02-24 01:47:01,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-02-24 01:47:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:47:01,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:01,294 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:01,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462 [2022-02-24 01:47:01,294 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1560906965, now seen corresponding path program 461 times [2022-02-24 01:47:01,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:01,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697467861] [2022-02-24 01:47:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:01,296 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:01,296 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:01,296 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:01,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:01,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:01,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697467861] [2022-02-24 01:47:01,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697467861] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:01,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:01,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:47:01,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438669144] [2022-02-24 01:47:01,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:01,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:47:01,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:01,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:47:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:47:01,715 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:03,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:03,420 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-02-24 01:47:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:47:03,420 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:47:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:03,420 INFO L225 Difference]: With dead ends: 356 [2022-02-24 01:47:03,420 INFO L226 Difference]: Without dead ends: 350 [2022-02-24 01:47:03,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:47:03,421 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:03,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-24 01:47:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 245. [2022-02-24 01:47:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-02-24 01:47:03,983 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 72 [2022-02-24 01:47:03,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:03,983 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-02-24 01:47:03,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-02-24 01:47:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:47:03,984 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:03,984 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:03,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463 [2022-02-24 01:47:03,984 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:03,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1333185451, now seen corresponding path program 462 times [2022-02-24 01:47:03,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:03,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138514304] [2022-02-24 01:47:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:03,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:03,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:03,986 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:03,986 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:04,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:04,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:04,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138514304] [2022-02-24 01:47:04,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [138514304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:04,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:04,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:47:04,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539650727] [2022-02-24 01:47:04,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:04,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:47:04,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:47:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:47:04,402 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:06,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:06,204 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-02-24 01:47:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:47:06,204 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:47:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:06,205 INFO L225 Difference]: With dead ends: 362 [2022-02-24 01:47:06,205 INFO L226 Difference]: Without dead ends: 356 [2022-02-24 01:47:06,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:47:06,205 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:06,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 29 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-24 01:47:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 247. [2022-02-24 01:47:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-02-24 01:47:06,773 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 72 [2022-02-24 01:47:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:06,773 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-02-24 01:47:06,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-02-24 01:47:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:47:06,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:06,774 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:06,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464 [2022-02-24 01:47:06,774 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:06,774 INFO L85 PathProgramCache]: Analyzing trace with hash 582810581, now seen corresponding path program 463 times [2022-02-24 01:47:06,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:06,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333151552] [2022-02-24 01:47:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:06,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:06,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:06,775 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:06,775 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:07,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:07,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:07,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333151552] [2022-02-24 01:47:07,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [333151552] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:07,192 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:07,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:47:07,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753183487] [2022-02-24 01:47:07,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:07,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:47:07,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:07,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:47:07,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:47:07,193 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:08,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:08,884 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-02-24 01:47:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:47:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:47:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:08,885 INFO L225 Difference]: With dead ends: 368 [2022-02-24 01:47:08,885 INFO L226 Difference]: Without dead ends: 362 [2022-02-24 01:47:08,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:47:08,885 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:08,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-24 01:47:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2022-02-24 01:47:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-02-24 01:47:09,456 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 72 [2022-02-24 01:47:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:09,456 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-02-24 01:47:09,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-02-24 01:47:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:47:09,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:09,456 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:09,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465 [2022-02-24 01:47:09,456 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash -685972651, now seen corresponding path program 464 times [2022-02-24 01:47:09,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:09,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872860380] [2022-02-24 01:47:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:09,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:09,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:09,458 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:09,458 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:09,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:09,877 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:09,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872860380] [2022-02-24 01:47:09,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872860380] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:09,877 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:09,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:47:09,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136867936] [2022-02-24 01:47:09,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:09,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:47:09,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:47:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:47:09,878 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:11,383 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-24 01:47:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:47:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:47:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:11,384 INFO L225 Difference]: With dead ends: 314 [2022-02-24 01:47:11,384 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:47:11,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:47:11,384 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:11,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:47:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 193. [2022-02-24 01:47:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-24 01:47:11,767 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 72 [2022-02-24 01:47:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:11,767 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-24 01:47:11,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-24 01:47:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:11,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:11,768 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:11,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable466 [2022-02-24 01:47:11,768 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1545292280, now seen corresponding path program 465 times [2022-02-24 01:47:11,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:11,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701021245] [2022-02-24 01:47:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:11,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:11,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:11,769 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:11,770 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:12,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:12,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:12,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701021245] [2022-02-24 01:47:12,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701021245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:12,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:12,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:12,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302315938] [2022-02-24 01:47:12,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:12,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:12,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:12,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:12,210 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:13,460 INFO L93 Difference]: Finished difference Result 208 states and 303 transitions. [2022-02-24 01:47:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:13,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:13,461 INFO L225 Difference]: With dead ends: 208 [2022-02-24 01:47:13,461 INFO L226 Difference]: Without dead ends: 202 [2022-02-24 01:47:13,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:13,461 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:13,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 21 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:13,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-02-24 01:47:13,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2022-02-24 01:47:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-24 01:47:13,857 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 74 [2022-02-24 01:47:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:13,857 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-24 01:47:13,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-24 01:47:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:13,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:13,858 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:13,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467 [2022-02-24 01:47:13,858 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash 450343288, now seen corresponding path program 466 times [2022-02-24 01:47:13,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:13,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875468419] [2022-02-24 01:47:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:13,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:13,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:13,859 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:13,859 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:14,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:14,302 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:14,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875468419] [2022-02-24 01:47:14,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [875468419] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:14,302 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:14,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:14,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997960393] [2022-02-24 01:47:14,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:14,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:14,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:14,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:14,303 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:15,556 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-24 01:47:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:15,557 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:15,557 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:47:15,557 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:47:15,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:15,557 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:15,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:47:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 201. [2022-02-24 01:47:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-24 01:47:15,987 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 74 [2022-02-24 01:47:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:15,987 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-24 01:47:15,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-24 01:47:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:15,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:15,987 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:15,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468 [2022-02-24 01:47:15,987 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:15,987 INFO L85 PathProgramCache]: Analyzing trace with hash 471349496, now seen corresponding path program 467 times [2022-02-24 01:47:15,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:15,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888635019] [2022-02-24 01:47:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:15,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:15,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:15,989 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:15,989 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:16,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:16,433 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:16,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888635019] [2022-02-24 01:47:16,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [888635019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:16,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:16,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:16,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750147322] [2022-02-24 01:47:16,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:16,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:16,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:16,435 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:17,712 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:47:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:17,713 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:47:17,713 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:47:17,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:17,714 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:17,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:47:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 203. [2022-02-24 01:47:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-24 01:47:18,134 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 74 [2022-02-24 01:47:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:18,134 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-24 01:47:18,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-24 01:47:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:18,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:18,134 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:18,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469 [2022-02-24 01:47:18,135 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash -816521096, now seen corresponding path program 468 times [2022-02-24 01:47:18,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:18,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177786135] [2022-02-24 01:47:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:18,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:18,136 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:18,136 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:18,136 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:18,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:18,677 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:18,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177786135] [2022-02-24 01:47:18,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177786135] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:18,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:18,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:18,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030089484] [2022-02-24 01:47:18,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:18,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:18,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:18,678 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:19,985 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:47:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:19,985 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:19,985 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:47:19,985 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:47:19,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:19,986 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:19,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:47:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2022-02-24 01:47:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-24 01:47:20,418 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 74 [2022-02-24 01:47:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:20,418 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-24 01:47:20,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-24 01:47:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:20,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:20,419 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:20,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470 [2022-02-24 01:47:20,419 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:20,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1509578760, now seen corresponding path program 469 times [2022-02-24 01:47:20,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:20,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549675082] [2022-02-24 01:47:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:20,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:20,420 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:20,420 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:20,420 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:20,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:20,860 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:20,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549675082] [2022-02-24 01:47:20,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [549675082] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:20,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:20,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:20,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970117779] [2022-02-24 01:47:20,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:20,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:20,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:20,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:20,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:20,861 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:22,195 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:47:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:22,196 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:22,196 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:47:22,196 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:47:22,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:22,196 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:22,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:47:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 207. [2022-02-24 01:47:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-24 01:47:22,636 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 74 [2022-02-24 01:47:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:22,636 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-24 01:47:22,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-24 01:47:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:22,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:22,637 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:22,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471 [2022-02-24 01:47:22,637 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:22,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1818062984, now seen corresponding path program 470 times [2022-02-24 01:47:22,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:22,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838903134] [2022-02-24 01:47:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:22,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:22,638 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:22,638 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:22,638 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:23,077 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:23,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838903134] [2022-02-24 01:47:23,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838903134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:23,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:23,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:23,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157526047] [2022-02-24 01:47:23,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:23,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:23,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:23,078 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:24,430 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:47:24,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:24,430 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:24,431 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:47:24,431 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:47:24,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:24,431 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:24,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:47:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 209. [2022-02-24 01:47:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-24 01:47:24,879 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 74 [2022-02-24 01:47:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:24,879 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-24 01:47:24,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-24 01:47:24,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:24,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:24,880 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:24,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472 [2022-02-24 01:47:24,880 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1918658824, now seen corresponding path program 471 times [2022-02-24 01:47:24,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:24,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689000864] [2022-02-24 01:47:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:24,881 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:24,882 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:24,882 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:25,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:25,319 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:25,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689000864] [2022-02-24 01:47:25,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [689000864] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:25,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:25,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:25,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31732870] [2022-02-24 01:47:25,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:25,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:25,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:25,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:25,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:25,320 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:26,682 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:47:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:26,683 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:47:26,683 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:47:26,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:26,683 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:26,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:47:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 211. [2022-02-24 01:47:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-24 01:47:27,144 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 74 [2022-02-24 01:47:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:27,144 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-24 01:47:27,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-24 01:47:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:27,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:27,144 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:27,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473 [2022-02-24 01:47:27,144 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash 192986744, now seen corresponding path program 472 times [2022-02-24 01:47:27,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:27,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306452839] [2022-02-24 01:47:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:27,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:27,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:27,146 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:27,146 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:27,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:27,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:27,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306452839] [2022-02-24 01:47:27,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306452839] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:27,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:27,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:27,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489435949] [2022-02-24 01:47:27,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:27,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:27,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:27,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:27,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:27,625 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:29,010 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:47:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:29,010 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:29,011 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:47:29,011 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:47:29,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:29,011 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:29,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:47:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 213. [2022-02-24 01:47:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-24 01:47:29,481 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 74 [2022-02-24 01:47:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:29,481 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-24 01:47:29,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-24 01:47:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:29,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:29,481 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:29,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474 [2022-02-24 01:47:29,481 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2035153416, now seen corresponding path program 473 times [2022-02-24 01:47:29,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:29,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699224688] [2022-02-24 01:47:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:29,483 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:29,483 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:29,483 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:29,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:29,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:29,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699224688] [2022-02-24 01:47:29,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1699224688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:29,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:29,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:29,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156240492] [2022-02-24 01:47:29,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:29,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:29,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:29,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:29,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:29,929 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:31,350 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:47:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:31,351 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:31,351 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:47:31,351 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:47:31,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:31,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:31,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:47:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 215. [2022-02-24 01:47:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-24 01:47:31,838 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 74 [2022-02-24 01:47:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:31,838 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-24 01:47:31,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-24 01:47:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:31,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:31,839 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:31,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475 [2022-02-24 01:47:31,839 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash -89166472, now seen corresponding path program 474 times [2022-02-24 01:47:31,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:31,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662225541] [2022-02-24 01:47:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:31,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:31,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:31,841 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:31,841 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:32,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:32,305 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:32,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662225541] [2022-02-24 01:47:32,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662225541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:32,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:32,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:32,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465142574] [2022-02-24 01:47:32,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:32,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:32,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:32,306 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:33,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:33,748 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:47:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:33,748 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:33,749 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:47:33,749 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:47:33,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:33,749 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:33,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:47:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2022-02-24 01:47:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-24 01:47:34,242 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 74 [2022-02-24 01:47:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:34,242 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-24 01:47:34,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-24 01:47:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:34,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:34,243 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:34,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable476 [2022-02-24 01:47:34,243 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:34,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1693512952, now seen corresponding path program 475 times [2022-02-24 01:47:34,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:34,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388067259] [2022-02-24 01:47:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:34,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:34,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:34,245 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:34,245 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:34,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:34,684 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:34,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388067259] [2022-02-24 01:47:34,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [388067259] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:34,684 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:34,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:34,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961018938] [2022-02-24 01:47:34,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:34,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:34,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:34,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:34,685 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:36,156 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:47:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:36,157 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:47:36,157 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:47:36,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:36,157 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:36,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:47:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 219. [2022-02-24 01:47:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-24 01:47:36,660 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 74 [2022-02-24 01:47:36,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:36,660 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-24 01:47:36,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:36,660 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-24 01:47:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:36,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:36,660 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:36,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477 [2022-02-24 01:47:36,661 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1156488312, now seen corresponding path program 476 times [2022-02-24 01:47:36,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:36,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748081406] [2022-02-24 01:47:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:36,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:36,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:36,662 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:36,662 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:37,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:37,103 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:37,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748081406] [2022-02-24 01:47:37,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748081406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:37,104 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:37,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:37,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582598683] [2022-02-24 01:47:37,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:37,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:37,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:37,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:37,104 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:38,602 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:47:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:38,603 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:47:38,603 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:47:38,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:38,603 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:38,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 31 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:47:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 221. [2022-02-24 01:47:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-24 01:47:39,113 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 74 [2022-02-24 01:47:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:39,113 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-24 01:47:39,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-24 01:47:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:39,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:39,113 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:39,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478 [2022-02-24 01:47:39,114 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:39,114 INFO L85 PathProgramCache]: Analyzing trace with hash 471884792, now seen corresponding path program 477 times [2022-02-24 01:47:39,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:39,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476072303] [2022-02-24 01:47:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:39,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:39,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:39,115 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:39,115 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:39,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:39,559 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:39,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476072303] [2022-02-24 01:47:39,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [476072303] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:39,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:39,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:39,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415755530] [2022-02-24 01:47:39,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:39,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:39,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:39,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:39,560 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:41,066 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:47:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:41,067 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:47:41,067 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:47:41,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:41,067 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:41,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:47:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 223. [2022-02-24 01:47:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-24 01:47:41,592 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 74 [2022-02-24 01:47:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:41,592 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-24 01:47:41,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-24 01:47:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:41,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:41,595 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:41,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479 [2022-02-24 01:47:41,595 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash -302101640, now seen corresponding path program 478 times [2022-02-24 01:47:41,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:41,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787662483] [2022-02-24 01:47:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:41,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:41,597 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:41,597 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:42,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:42,033 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:42,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787662483] [2022-02-24 01:47:42,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787662483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:42,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:42,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:42,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849832724] [2022-02-24 01:47:42,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:42,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:42,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:42,034 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:43,575 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:47:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:43,575 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:47:43,575 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:47:43,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:43,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:43,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:47:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 225. [2022-02-24 01:47:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-24 01:47:44,103 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 74 [2022-02-24 01:47:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:44,103 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-24 01:47:44,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-24 01:47:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:44,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:44,103 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:44,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480 [2022-02-24 01:47:44,104 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1073720584, now seen corresponding path program 479 times [2022-02-24 01:47:44,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:44,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017638171] [2022-02-24 01:47:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:44,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:44,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:44,105 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:44,105 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:44,544 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:44,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017638171] [2022-02-24 01:47:44,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017638171] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:44,544 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:44,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:44,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485221271] [2022-02-24 01:47:44,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:44,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:44,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:44,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:44,545 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:46,122 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-24 01:47:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:46,123 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:47:46,123 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:47:46,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:46,123 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:46,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:47:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2022-02-24 01:47:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-24 01:47:46,655 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 74 [2022-02-24 01:47:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:46,655 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-24 01:47:46,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-24 01:47:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:46,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:46,655 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:46,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481 [2022-02-24 01:47:46,655 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:46,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash 429816440, now seen corresponding path program 480 times [2022-02-24 01:47:46,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:46,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869771949] [2022-02-24 01:47:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:46,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:46,657 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:46,657 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:47,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:47,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:47,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869771949] [2022-02-24 01:47:47,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [869771949] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:47,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:47,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:47,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636170562] [2022-02-24 01:47:47,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:47,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:47,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:47,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:47,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:47,096 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:48,689 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-24 01:47:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:48,690 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:47:48,690 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:47:48,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:48,690 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:48,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:47:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 229. [2022-02-24 01:47:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-24 01:47:49,234 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 74 [2022-02-24 01:47:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:49,234 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-24 01:47:49,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-24 01:47:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:49,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:49,235 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:49,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482 [2022-02-24 01:47:49,235 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:49,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2075082248, now seen corresponding path program 481 times [2022-02-24 01:47:49,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:49,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729915064] [2022-02-24 01:47:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:49,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:49,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:49,236 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:49,236 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:49,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:49,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:49,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729915064] [2022-02-24 01:47:49,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [729915064] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:49,745 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:49,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:49,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326501748] [2022-02-24 01:47:49,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:49,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:49,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:49,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:49,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:49,746 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:51,366 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-24 01:47:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:51,366 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:51,367 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:47:51,367 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 01:47:51,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:51,367 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:51,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 01:47:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 231. [2022-02-24 01:47:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-24 01:47:51,928 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 74 [2022-02-24 01:47:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:51,928 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-24 01:47:51,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-24 01:47:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:51,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:51,928 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:51,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483 [2022-02-24 01:47:51,928 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash 193931640, now seen corresponding path program 482 times [2022-02-24 01:47:51,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:51,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262880451] [2022-02-24 01:47:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:51,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:51,930 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:51,930 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:52,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:52,373 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:52,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262880451] [2022-02-24 01:47:52,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1262880451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:52,373 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:52,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:52,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870451426] [2022-02-24 01:47:52,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:52,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:52,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:52,374 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:54,021 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-24 01:47:54,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:54,021 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:54,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:54,022 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:47:54,022 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:47:54,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:54,022 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:54,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:47:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 233. [2022-02-24 01:47:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-24 01:47:54,594 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 74 [2022-02-24 01:47:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:54,594 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-24 01:47:54,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-24 01:47:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:54,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:54,595 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:54,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484 [2022-02-24 01:47:54,595 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:54,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1127108360, now seen corresponding path program 483 times [2022-02-24 01:47:54,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:54,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984146733] [2022-02-24 01:47:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:54,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:54,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:54,596 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:54,596 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:55,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:55,033 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:55,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984146733] [2022-02-24 01:47:55,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [984146733] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:55,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:55,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:55,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258780763] [2022-02-24 01:47:55,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:55,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:55,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:55,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:55,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:55,035 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:56,699 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-24 01:47:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:56,700 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:56,700 INFO L225 Difference]: With dead ends: 314 [2022-02-24 01:47:56,700 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:47:56,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:56,700 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:56,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:56,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:47:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2022-02-24 01:47:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-02-24 01:47:57,273 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 74 [2022-02-24 01:47:57,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:57,274 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-02-24 01:47:57,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-02-24 01:47:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:57,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:57,274 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:57,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485 [2022-02-24 01:47:57,274 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:57,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:57,274 INFO L85 PathProgramCache]: Analyzing trace with hash 663771256, now seen corresponding path program 484 times [2022-02-24 01:47:57,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:57,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413585562] [2022-02-24 01:47:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:57,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:57,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:57,276 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:57,276 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:57,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:47:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:47:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:47:57,713 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:47:57,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413585562] [2022-02-24 01:47:57,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413585562] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:47:57,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:47:57,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:47:57,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190549246] [2022-02-24 01:47:57,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:47:57,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:47:57,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:47:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:47:57,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:47:57,715 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:47:59,398 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-24 01:47:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:47:59,399 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:47:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:47:59,399 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:47:59,399 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 01:47:59,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:47:59,400 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:47:59,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 17 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:47:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 01:47:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 237. [2022-02-24 01:47:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-02-24 01:47:59,983 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 74 [2022-02-24 01:47:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:47:59,983 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-02-24 01:47:59,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:47:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-02-24 01:47:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:47:59,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:47:59,983 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:47:59,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486 [2022-02-24 01:47:59,984 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:47:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:47:59,984 INFO L85 PathProgramCache]: Analyzing trace with hash -582803464, now seen corresponding path program 485 times [2022-02-24 01:47:59,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:47:59,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409442326] [2022-02-24 01:47:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:47:59,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:47:59,985 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:47:59,985 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:47:59,985 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:47:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:00,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:00,433 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:00,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409442326] [2022-02-24 01:48:00,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [409442326] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:00,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:00,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:00,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827422981] [2022-02-24 01:48:00,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:00,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:00,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:00,434 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:02,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:02,157 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-24 01:48:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:02,158 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:02,158 INFO L225 Difference]: With dead ends: 326 [2022-02-24 01:48:02,158 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 01:48:02,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:02,158 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:02,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 01:48:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 239. [2022-02-24 01:48:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-02-24 01:48:02,742 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 74 [2022-02-24 01:48:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:02,742 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-02-24 01:48:02,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-02-24 01:48:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:02,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:02,743 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:02,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487 [2022-02-24 01:48:02,743 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:02,743 INFO L85 PathProgramCache]: Analyzing trace with hash -245233800, now seen corresponding path program 486 times [2022-02-24 01:48:02,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:02,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441101109] [2022-02-24 01:48:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:02,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:02,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:02,745 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:02,745 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:03,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:03,181 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:03,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441101109] [2022-02-24 01:48:03,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1441101109] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:03,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:03,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:03,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499983391] [2022-02-24 01:48:03,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:03,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:03,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:03,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:03,182 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:04,904 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-24 01:48:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:04,904 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:04,905 INFO L225 Difference]: With dead ends: 332 [2022-02-24 01:48:04,905 INFO L226 Difference]: Without dead ends: 326 [2022-02-24 01:48:04,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:04,905 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:04,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:04,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-24 01:48:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 241. [2022-02-24 01:48:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-02-24 01:48:05,506 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 74 [2022-02-24 01:48:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:05,506 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-02-24 01:48:05,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-02-24 01:48:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:05,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:05,506 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:05,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable488 [2022-02-24 01:48:05,506 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2036666104, now seen corresponding path program 487 times [2022-02-24 01:48:05,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:05,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005483382] [2022-02-24 01:48:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:05,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:05,508 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:05,508 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:05,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:05,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:05,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005483382] [2022-02-24 01:48:05,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1005483382] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:05,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:05,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:05,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300457828] [2022-02-24 01:48:05,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:05,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:05,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:05,947 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:07,693 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-24 01:48:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:07,693 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:07,694 INFO L225 Difference]: With dead ends: 338 [2022-02-24 01:48:07,694 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 01:48:07,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:07,694 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:07,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 01:48:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 243. [2022-02-24 01:48:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-02-24 01:48:08,288 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 74 [2022-02-24 01:48:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:08,288 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-02-24 01:48:08,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-02-24 01:48:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:08,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:08,289 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:08,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489 [2022-02-24 01:48:08,289 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:08,289 INFO L85 PathProgramCache]: Analyzing trace with hash 214185592, now seen corresponding path program 488 times [2022-02-24 01:48:08,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:08,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061283820] [2022-02-24 01:48:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:08,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:08,290 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:08,290 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:08,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:08,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:08,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061283820] [2022-02-24 01:48:08,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1061283820] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:08,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:08,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:08,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935057541] [2022-02-24 01:48:08,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:08,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:08,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:08,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:08,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:08,727 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:10,483 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-24 01:48:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:10,484 INFO L225 Difference]: With dead ends: 344 [2022-02-24 01:48:10,484 INFO L226 Difference]: Without dead ends: 338 [2022-02-24 01:48:10,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:10,485 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:10,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-24 01:48:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 245. [2022-02-24 01:48:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-02-24 01:48:11,096 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 74 [2022-02-24 01:48:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:11,097 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-02-24 01:48:11,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-02-24 01:48:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:11,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:11,097 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:11,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490 [2022-02-24 01:48:11,097 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1157070328, now seen corresponding path program 489 times [2022-02-24 01:48:11,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:11,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699330917] [2022-02-24 01:48:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:11,099 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:11,099 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:11,099 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:11,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:11,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:11,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699330917] [2022-02-24 01:48:11,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [699330917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:11,534 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:11,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:11,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478373805] [2022-02-24 01:48:11,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:11,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:11,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:11,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:11,535 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:13,318 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-02-24 01:48:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:13,319 INFO L225 Difference]: With dead ends: 350 [2022-02-24 01:48:13,319 INFO L226 Difference]: Without dead ends: 344 [2022-02-24 01:48:13,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:13,320 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:13,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-24 01:48:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 247. [2022-02-24 01:48:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-02-24 01:48:13,936 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 74 [2022-02-24 01:48:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:13,937 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-02-24 01:48:13,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-02-24 01:48:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:13,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:13,937 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:13,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491 [2022-02-24 01:48:13,937 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1031202168, now seen corresponding path program 490 times [2022-02-24 01:48:13,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:13,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291301380] [2022-02-24 01:48:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:13,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:13,939 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:13,939 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:14,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:14,376 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:14,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291301380] [2022-02-24 01:48:14,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [291301380] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:14,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:14,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:14,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433426364] [2022-02-24 01:48:14,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:14,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:14,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:14,377 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:16,168 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-02-24 01:48:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:16,169 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:16,169 INFO L225 Difference]: With dead ends: 356 [2022-02-24 01:48:16,169 INFO L226 Difference]: Without dead ends: 350 [2022-02-24 01:48:16,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:16,169 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:16,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-24 01:48:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 249. [2022-02-24 01:48:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-02-24 01:48:16,782 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 74 [2022-02-24 01:48:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:16,783 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-02-24 01:48:16,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-02-24 01:48:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:16,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:16,783 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:16,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492 [2022-02-24 01:48:16,783 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:16,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:16,783 INFO L85 PathProgramCache]: Analyzing trace with hash 330984696, now seen corresponding path program 491 times [2022-02-24 01:48:16,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:16,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29380598] [2022-02-24 01:48:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:16,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:16,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:16,785 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:16,785 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:17,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:17,219 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:17,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29380598] [2022-02-24 01:48:17,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [29380598] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:17,219 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:17,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:17,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815035272] [2022-02-24 01:48:17,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:17,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:17,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:17,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:17,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:17,220 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:19,010 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-02-24 01:48:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:19,011 INFO L225 Difference]: With dead ends: 362 [2022-02-24 01:48:19,011 INFO L226 Difference]: Without dead ends: 356 [2022-02-24 01:48:19,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:19,012 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:19,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 17 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-24 01:48:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 251. [2022-02-24 01:48:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.4878048780487805) internal successors, (366), 246 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2022-02-24 01:48:19,634 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 74 [2022-02-24 01:48:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:19,634 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2022-02-24 01:48:19,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2022-02-24 01:48:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:19,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:19,634 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:19,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493 [2022-02-24 01:48:19,634 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1731859576, now seen corresponding path program 492 times [2022-02-24 01:48:19,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:19,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013972276] [2022-02-24 01:48:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:19,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:19,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:19,636 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:19,636 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:20,074 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:20,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013972276] [2022-02-24 01:48:20,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2013972276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:20,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:20,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:20,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81895782] [2022-02-24 01:48:20,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:20,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:20,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:20,075 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:21,882 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-02-24 01:48:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:21,883 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:21,883 INFO L225 Difference]: With dead ends: 368 [2022-02-24 01:48:21,883 INFO L226 Difference]: Without dead ends: 362 [2022-02-24 01:48:21,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:21,884 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:21,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-24 01:48:22,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 253. [2022-02-24 01:48:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.4879032258064515) internal successors, (369), 248 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 373 transitions. [2022-02-24 01:48:22,522 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 373 transitions. Word has length 74 [2022-02-24 01:48:22,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:22,523 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 373 transitions. [2022-02-24 01:48:22,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 373 transitions. [2022-02-24 01:48:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:22,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:22,523 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:22,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494 [2022-02-24 01:48:22,523 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:22,523 INFO L85 PathProgramCache]: Analyzing trace with hash -647111688, now seen corresponding path program 493 times [2022-02-24 01:48:22,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:22,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358820176] [2022-02-24 01:48:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:22,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:22,525 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:22,525 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:22,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:22,960 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:22,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358820176] [2022-02-24 01:48:22,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358820176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:22,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:22,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:22,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356467783] [2022-02-24 01:48:22,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:22,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:22,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:22,961 INFO L87 Difference]: Start difference. First operand 253 states and 373 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:24,771 INFO L93 Difference]: Finished difference Result 374 states and 551 transitions. [2022-02-24 01:48:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:24,772 INFO L225 Difference]: With dead ends: 374 [2022-02-24 01:48:24,772 INFO L226 Difference]: Without dead ends: 368 [2022-02-24 01:48:24,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:24,773 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:24,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-24 01:48:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 255. [2022-02-24 01:48:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.488) internal successors, (372), 250 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 376 transitions. [2022-02-24 01:48:25,397 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 376 transitions. Word has length 74 [2022-02-24 01:48:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:25,397 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 376 transitions. [2022-02-24 01:48:25,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 376 transitions. [2022-02-24 01:48:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:25,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:25,397 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:25,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495 [2022-02-24 01:48:25,398 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1915894920, now seen corresponding path program 494 times [2022-02-24 01:48:25,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:25,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882615401] [2022-02-24 01:48:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:25,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:25,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:25,399 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:25,399 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:25,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:25,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:25,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882615401] [2022-02-24 01:48:25,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1882615401] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:25,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:25,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:25,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768408561] [2022-02-24 01:48:25,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:25,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:25,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:25,837 INFO L87 Difference]: Start difference. First operand 255 states and 376 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:27,663 INFO L93 Difference]: Finished difference Result 380 states and 560 transitions. [2022-02-24 01:48:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:27,664 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:27,664 INFO L225 Difference]: With dead ends: 380 [2022-02-24 01:48:27,664 INFO L226 Difference]: Without dead ends: 374 [2022-02-24 01:48:27,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:27,665 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:27,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-24 01:48:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 257. [2022-02-24 01:48:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-02-24 01:48:28,296 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 74 [2022-02-24 01:48:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:28,296 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-02-24 01:48:28,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-02-24 01:48:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:48:28,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:28,296 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:28,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496 [2022-02-24 01:48:28,297 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:28,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1445868808, now seen corresponding path program 495 times [2022-02-24 01:48:28,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:28,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948230853] [2022-02-24 01:48:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:28,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:28,298 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:28,298 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:28,298 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:28,735 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:28,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948230853] [2022-02-24 01:48:28,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [948230853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:28,735 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:28,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:48:28,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020621819] [2022-02-24 01:48:28,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:28,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:48:28,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:28,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:48:28,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:48:28,736 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:30,361 INFO L93 Difference]: Finished difference Result 324 states and 476 transitions. [2022-02-24 01:48:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:48:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:48:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:30,362 INFO L225 Difference]: With dead ends: 324 [2022-02-24 01:48:30,362 INFO L226 Difference]: Without dead ends: 318 [2022-02-24 01:48:30,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:48:30,362 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:30,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-24 01:48:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 199. [2022-02-24 01:48:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-24 01:48:30,785 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 74 [2022-02-24 01:48:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:30,785 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-24 01:48:30,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-24 01:48:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:30,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:30,786 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:30,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497 [2022-02-24 01:48:30,786 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:30,786 INFO L85 PathProgramCache]: Analyzing trace with hash 705998171, now seen corresponding path program 496 times [2022-02-24 01:48:30,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:30,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927410043] [2022-02-24 01:48:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:30,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:30,787 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:30,787 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:30,787 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:31,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:31,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927410043] [2022-02-24 01:48:31,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927410043] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:31,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:31,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:31,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61419327] [2022-02-24 01:48:31,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:31,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:31,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:31,248 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:32,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:32,572 INFO L93 Difference]: Finished difference Result 214 states and 312 transitions. [2022-02-24 01:48:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:32,573 INFO L225 Difference]: With dead ends: 214 [2022-02-24 01:48:32,573 INFO L226 Difference]: Without dead ends: 208 [2022-02-24 01:48:32,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:32,573 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:32,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 19 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-24 01:48:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2022-02-24 01:48:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-24 01:48:33,013 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 76 [2022-02-24 01:48:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:33,013 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-24 01:48:33,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-24 01:48:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:33,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:33,014 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:33,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498 [2022-02-24 01:48:33,014 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash -388950821, now seen corresponding path program 497 times [2022-02-24 01:48:33,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:33,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731794225] [2022-02-24 01:48:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:33,015 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:33,015 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:33,016 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:33,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:33,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:33,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731794225] [2022-02-24 01:48:33,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [731794225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:33,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:33,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:33,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902847557] [2022-02-24 01:48:33,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:33,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:33,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:33,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:33,477 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:34,823 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-24 01:48:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:34,824 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:34,824 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:48:34,824 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:48:34,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:34,824 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:34,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 17 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:48:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2022-02-24 01:48:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-24 01:48:35,289 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 76 [2022-02-24 01:48:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:35,290 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-24 01:48:35,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-24 01:48:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:35,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:35,290 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:35,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499 [2022-02-24 01:48:35,290 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash -367944613, now seen corresponding path program 498 times [2022-02-24 01:48:35,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:35,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041768411] [2022-02-24 01:48:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:35,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:35,292 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:35,292 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:35,292 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:35,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:35,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:35,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041768411] [2022-02-24 01:48:35,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041768411] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:35,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:35,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:35,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734201061] [2022-02-24 01:48:35,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:35,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:35,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:35,752 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:37,105 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:48:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:37,105 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:37,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:37,105 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:48:37,105 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:48:37,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:37,106 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:37,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:48:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 209. [2022-02-24 01:48:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-24 01:48:37,577 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 76 [2022-02-24 01:48:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:37,577 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-24 01:48:37,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-24 01:48:37,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:37,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:37,578 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:37,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500 [2022-02-24 01:48:37,578 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1655815205, now seen corresponding path program 499 times [2022-02-24 01:48:37,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:37,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856212081] [2022-02-24 01:48:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:37,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:37,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:37,579 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:37,579 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:38,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:38,040 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:38,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856212081] [2022-02-24 01:48:38,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [856212081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:38,040 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:38,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:38,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229423000] [2022-02-24 01:48:38,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:38,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:38,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:38,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:38,041 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:39,371 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:48:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:39,371 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:39,371 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:48:39,371 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:48:39,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:39,372 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:39,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:48:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 211. [2022-02-24 01:48:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-24 01:48:39,811 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 76 [2022-02-24 01:48:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:39,812 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-24 01:48:39,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-24 01:48:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:39,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:39,812 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:39,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501 [2022-02-24 01:48:39,812 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:39,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1946094427, now seen corresponding path program 500 times [2022-02-24 01:48:39,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:39,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609671996] [2022-02-24 01:48:39,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:39,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:39,814 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:39,814 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:39,814 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:40,267 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:40,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609671996] [2022-02-24 01:48:40,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1609671996] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:40,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:40,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:40,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673699662] [2022-02-24 01:48:40,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:40,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:40,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:40,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:40,268 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:41,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:41,607 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-24 01:48:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:41,608 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:48:41,608 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:48:41,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:41,608 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:41,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:48:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 213. [2022-02-24 01:48:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-24 01:48:42,066 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 76 [2022-02-24 01:48:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:42,066 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-24 01:48:42,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-24 01:48:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:42,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:42,066 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:42,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502 [2022-02-24 01:48:42,067 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1637610203, now seen corresponding path program 501 times [2022-02-24 01:48:42,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:42,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629672411] [2022-02-24 01:48:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:42,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:42,068 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:42,068 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:42,519 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:42,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629672411] [2022-02-24 01:48:42,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1629672411] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:42,519 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:42,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:42,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002114055] [2022-02-24 01:48:42,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:42,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:42,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:42,520 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:43,905 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-24 01:48:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:43,905 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:43,905 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:48:43,905 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:48:43,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:43,906 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:43,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:48:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 215. [2022-02-24 01:48:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-24 01:48:44,364 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 76 [2022-02-24 01:48:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:44,364 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-24 01:48:44,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-24 01:48:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:44,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:44,364 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:44,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503 [2022-02-24 01:48:44,365 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:44,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1537014363, now seen corresponding path program 502 times [2022-02-24 01:48:44,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:44,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224744171] [2022-02-24 01:48:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:44,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:44,366 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:44,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:44,366 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:44,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:44,820 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:44,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224744171] [2022-02-24 01:48:44,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [224744171] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:44,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:44,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:44,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229861641] [2022-02-24 01:48:44,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:44,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:44,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:44,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:44,821 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:46,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:46,204 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-24 01:48:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:46,205 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:46,205 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:48:46,205 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:48:46,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:46,205 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:46,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 15 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:48:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 217. [2022-02-24 01:48:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-24 01:48:46,672 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 76 [2022-02-24 01:48:46,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:46,672 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-24 01:48:46,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-24 01:48:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:46,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:46,672 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:46,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504 [2022-02-24 01:48:46,672 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash -646307365, now seen corresponding path program 503 times [2022-02-24 01:48:46,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:46,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822495449] [2022-02-24 01:48:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:46,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:46,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:46,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:46,675 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:47,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:47,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:47,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822495449] [2022-02-24 01:48:47,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [822495449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:47,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:47,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:47,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825229316] [2022-02-24 01:48:47,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:47,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:47,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:47,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:47,145 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:48,551 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-24 01:48:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:48,551 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:48:48,552 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:48:48,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:48,552 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:48,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:48:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 219. [2022-02-24 01:48:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-24 01:48:49,025 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 76 [2022-02-24 01:48:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:49,026 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-24 01:48:49,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-24 01:48:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:49,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:49,026 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:49,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505 [2022-02-24 01:48:49,026 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:49,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1420519771, now seen corresponding path program 504 times [2022-02-24 01:48:49,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:49,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296315653] [2022-02-24 01:48:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:49,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:49,028 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:49,028 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:49,028 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:49,481 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:49,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296315653] [2022-02-24 01:48:49,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [296315653] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:49,481 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:49,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:49,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454795929] [2022-02-24 01:48:49,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:49,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:49,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:49,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:49,482 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:50,904 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-24 01:48:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:50,904 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:50,905 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:48:50,905 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:48:50,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:50,905 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:50,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:48:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 221. [2022-02-24 01:48:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-24 01:48:51,395 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 76 [2022-02-24 01:48:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:51,395 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-24 01:48:51,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-24 01:48:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:51,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:51,395 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:51,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506 [2022-02-24 01:48:51,395 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -928460581, now seen corresponding path program 505 times [2022-02-24 01:48:51,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:51,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737001019] [2022-02-24 01:48:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:51,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:51,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:51,397 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:51,397 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:51,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:51,849 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:51,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737001019] [2022-02-24 01:48:51,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [737001019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:51,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:51,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:51,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617054862] [2022-02-24 01:48:51,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:51,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:51,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:51,850 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:53,373 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-24 01:48:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:53,373 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:48:53,373 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:48:53,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:53,374 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:53,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:48:53,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 223. [2022-02-24 01:48:53,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-24 01:48:53,862 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 76 [2022-02-24 01:48:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:53,863 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-24 01:48:53,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:53,863 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-24 01:48:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:53,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:53,863 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:53,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507 [2022-02-24 01:48:53,863 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:53,863 INFO L85 PathProgramCache]: Analyzing trace with hash 854218843, now seen corresponding path program 506 times [2022-02-24 01:48:53,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:53,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585179816] [2022-02-24 01:48:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:53,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:53,865 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:53,865 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:53,865 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:54,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:54,315 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:54,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585179816] [2022-02-24 01:48:54,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [585179816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:54,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:54,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:54,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465127334] [2022-02-24 01:48:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:54,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:54,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:54,316 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:55,796 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-24 01:48:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:55,797 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:48:55,797 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:48:55,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:55,797 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:55,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:48:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 225. [2022-02-24 01:48:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-24 01:48:56,299 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 76 [2022-02-24 01:48:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:56,299 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-24 01:48:56,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-24 01:48:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:56,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:56,300 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:56,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508 [2022-02-24 01:48:56,300 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash 317194203, now seen corresponding path program 507 times [2022-02-24 01:48:56,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:56,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977055328] [2022-02-24 01:48:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:56,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:56,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:56,302 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:56,302 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:56,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:56,754 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:56,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977055328] [2022-02-24 01:48:56,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977055328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:56,754 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:56,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:56,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930708230] [2022-02-24 01:48:56,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:56,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:56,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:56,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:56,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:56,755 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:48:58,258 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-24 01:48:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:48:58,258 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:48:58,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:48:58,259 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:48:58,259 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:48:58,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:48:58,259 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:48:58,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:48:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:48:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 227. [2022-02-24 01:48:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-24 01:48:58,771 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 76 [2022-02-24 01:48:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:48:58,771 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-24 01:48:58,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:48:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-24 01:48:58,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:48:58,771 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:48:58,771 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:48:58,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509 [2022-02-24 01:48:58,771 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:48:58,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:48:58,772 INFO L85 PathProgramCache]: Analyzing trace with hash -367409317, now seen corresponding path program 508 times [2022-02-24 01:48:58,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:48:58,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860332386] [2022-02-24 01:48:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:48:58,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:48:58,773 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:48:58,773 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:48:58,774 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:48:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:59,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:48:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:48:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:48:59,227 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:48:59,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860332386] [2022-02-24 01:48:59,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [860332386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:48:59,227 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:48:59,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:48:59,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169270418] [2022-02-24 01:48:59,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:48:59,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:48:59,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:48:59,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:48:59,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:48:59,231 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:00,763 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-24 01:49:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:00,763 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:00,763 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:49:00,763 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:49:00,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:00,764 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:00,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:49:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 229. [2022-02-24 01:49:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-24 01:49:01,283 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 76 [2022-02-24 01:49:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:01,283 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-24 01:49:01,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-24 01:49:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:01,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:01,284 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:01,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510 [2022-02-24 01:49:01,284 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:01,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:01,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1141395749, now seen corresponding path program 509 times [2022-02-24 01:49:01,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:01,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265567580] [2022-02-24 01:49:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:01,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:01,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:01,287 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:01,287 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:01,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:01,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:01,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265567580] [2022-02-24 01:49:01,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265567580] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:01,745 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:01,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:01,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190311789] [2022-02-24 01:49:01,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:01,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:01,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:01,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:01,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:01,748 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:03,314 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-24 01:49:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:03,315 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:03,315 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:49:03,315 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:49:03,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:03,317 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:03,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:49:03,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 231. [2022-02-24 01:49:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-24 01:49:03,856 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 76 [2022-02-24 01:49:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:03,857 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-24 01:49:03,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:03,857 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-24 01:49:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:03,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:03,857 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:03,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511 [2022-02-24 01:49:03,858 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:03,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:03,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1913014693, now seen corresponding path program 510 times [2022-02-24 01:49:03,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:03,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454433872] [2022-02-24 01:49:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:03,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:03,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:03,859 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:03,860 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:04,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:04,308 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:04,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454433872] [2022-02-24 01:49:04,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1454433872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:04,308 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:04,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:04,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195304531] [2022-02-24 01:49:04,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:04,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:04,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:04,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:04,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:04,309 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:05,910 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-24 01:49:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:05,910 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:49:05,910 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:49:05,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:05,911 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:05,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:49:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 233. [2022-02-24 01:49:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-24 01:49:06,457 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 76 [2022-02-24 01:49:06,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:06,457 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-24 01:49:06,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:06,457 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-24 01:49:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:06,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:06,457 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:06,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512 [2022-02-24 01:49:06,457 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:06,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:06,458 INFO L85 PathProgramCache]: Analyzing trace with hash -409477669, now seen corresponding path program 511 times [2022-02-24 01:49:06,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:06,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210305655] [2022-02-24 01:49:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:06,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:06,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:06,459 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:06,459 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:06,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:06,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:06,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210305655] [2022-02-24 01:49:06,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210305655] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:06,910 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:06,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:06,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952238972] [2022-02-24 01:49:06,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:06,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:06,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:06,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:06,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:06,910 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:08,536 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-24 01:49:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:08,536 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:08,537 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:49:08,537 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 01:49:08,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:08,537 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:08,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 01:49:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 235. [2022-02-24 01:49:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-02-24 01:49:09,080 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 76 [2022-02-24 01:49:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:09,080 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-02-24 01:49:09,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-02-24 01:49:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:09,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:09,080 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:09,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513 [2022-02-24 01:49:09,081 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:09,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:09,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1380590939, now seen corresponding path program 512 times [2022-02-24 01:49:09,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:09,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766285973] [2022-02-24 01:49:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:09,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:09,082 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:09,082 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:09,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:09,531 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:09,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766285973] [2022-02-24 01:49:09,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [766285973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:09,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:09,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:09,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678588053] [2022-02-24 01:49:09,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:09,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:09,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:09,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:09,532 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:11,162 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-24 01:49:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:11,162 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:11,163 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:49:11,163 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:49:11,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:11,163 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:11,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:49:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 237. [2022-02-24 01:49:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-02-24 01:49:11,725 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 76 [2022-02-24 01:49:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:11,726 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-02-24 01:49:11,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-02-24 01:49:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:11,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:11,726 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:11,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514 [2022-02-24 01:49:11,726 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash -645362469, now seen corresponding path program 513 times [2022-02-24 01:49:11,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:11,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847643884] [2022-02-24 01:49:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:11,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:11,728 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:11,728 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:12,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:12,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:12,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847643884] [2022-02-24 01:49:12,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [847643884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:12,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:12,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:12,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160464221] [2022-02-24 01:49:12,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:12,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:12,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:12,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:12,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:12,178 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:13,841 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-24 01:49:13,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:13,841 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:13,842 INFO L225 Difference]: With dead ends: 314 [2022-02-24 01:49:13,842 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:49:13,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:13,842 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:13,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 25 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:49:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 239. [2022-02-24 01:49:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-02-24 01:49:14,412 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 76 [2022-02-24 01:49:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:14,412 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-02-24 01:49:14,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-02-24 01:49:14,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:14,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:14,412 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:14,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515 [2022-02-24 01:49:14,412 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1966402469, now seen corresponding path program 514 times [2022-02-24 01:49:14,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:14,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950910212] [2022-02-24 01:49:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:14,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:14,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:14,414 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:14,414 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:14,864 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:14,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950910212] [2022-02-24 01:49:14,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [950910212] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:14,864 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:14,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:14,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118766389] [2022-02-24 01:49:14,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:14,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:14,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:14,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:14,865 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:16,548 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-24 01:49:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:16,548 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:49:16,549 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 01:49:16,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:16,549 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:16,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 27 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 01:49:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 241. [2022-02-24 01:49:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-02-24 01:49:17,125 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 76 [2022-02-24 01:49:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:17,125 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-02-24 01:49:17,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-02-24 01:49:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:17,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:17,126 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:17,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516 [2022-02-24 01:49:17,126 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash -175522853, now seen corresponding path program 515 times [2022-02-24 01:49:17,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:17,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096811470] [2022-02-24 01:49:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:17,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:17,127 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:17,127 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:17,127 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:17,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:17,579 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:17,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096811470] [2022-02-24 01:49:17,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2096811470] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:17,579 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:17,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:17,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109347833] [2022-02-24 01:49:17,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:17,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:17,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:17,580 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:19,298 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-24 01:49:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:19,298 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:19,299 INFO L225 Difference]: With dead ends: 326 [2022-02-24 01:49:19,299 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 01:49:19,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:19,299 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:19,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 01:49:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 243. [2022-02-24 01:49:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-02-24 01:49:19,876 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 76 [2022-02-24 01:49:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:19,877 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-02-24 01:49:19,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-02-24 01:49:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:19,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:19,877 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:19,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517 [2022-02-24 01:49:19,877 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1422097573, now seen corresponding path program 516 times [2022-02-24 01:49:19,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:19,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146982018] [2022-02-24 01:49:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:19,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:19,879 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:19,879 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:20,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:20,333 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:20,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146982018] [2022-02-24 01:49:20,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [146982018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:20,333 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:20,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:20,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847810438] [2022-02-24 01:49:20,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:20,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:20,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:20,334 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:22,067 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-24 01:49:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:22,068 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:22,068 INFO L225 Difference]: With dead ends: 332 [2022-02-24 01:49:22,068 INFO L226 Difference]: Without dead ends: 326 [2022-02-24 01:49:22,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:22,069 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:22,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-24 01:49:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 245. [2022-02-24 01:49:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-02-24 01:49:22,662 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 76 [2022-02-24 01:49:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:22,662 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-02-24 01:49:22,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-02-24 01:49:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:22,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:22,663 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:22,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518 [2022-02-24 01:49:22,663 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:22,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1084527909, now seen corresponding path program 517 times [2022-02-24 01:49:22,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:22,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733866877] [2022-02-24 01:49:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:22,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:22,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:22,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:22,664 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:23,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:23,117 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:23,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733866877] [2022-02-24 01:49:23,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [733866877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:23,118 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:23,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:23,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517850783] [2022-02-24 01:49:23,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:23,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:23,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:23,118 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:24,869 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-24 01:49:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:24,870 INFO L225 Difference]: With dead ends: 338 [2022-02-24 01:49:24,870 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 01:49:24,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:24,870 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:24,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 01:49:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 247. [2022-02-24 01:49:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-02-24 01:49:25,470 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 76 [2022-02-24 01:49:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:25,470 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-02-24 01:49:25,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-02-24 01:49:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:25,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:25,471 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:25,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2022-02-24 01:49:25,471 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:25,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1197371995, now seen corresponding path program 518 times [2022-02-24 01:49:25,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:25,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74998414] [2022-02-24 01:49:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:25,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:25,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:25,472 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:25,473 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:25,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:25,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:25,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74998414] [2022-02-24 01:49:25,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [74998414] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:25,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:25,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:25,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851130559] [2022-02-24 01:49:25,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:25,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:25,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:25,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:25,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:25,929 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:27,712 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-24 01:49:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:27,712 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:27,713 INFO L225 Difference]: With dead ends: 344 [2022-02-24 01:49:27,713 INFO L226 Difference]: Without dead ends: 338 [2022-02-24 01:49:27,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:27,713 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:27,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 25 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-24 01:49:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 249. [2022-02-24 01:49:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-02-24 01:49:28,318 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 76 [2022-02-24 01:49:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:28,318 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-02-24 01:49:28,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-02-24 01:49:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:28,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:28,318 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:28,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2022-02-24 01:49:28,318 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:28,318 INFO L85 PathProgramCache]: Analyzing trace with hash -625108517, now seen corresponding path program 519 times [2022-02-24 01:49:28,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:28,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61622719] [2022-02-24 01:49:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:28,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:28,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:28,320 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:28,320 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:28,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:28,771 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:28,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61622719] [2022-02-24 01:49:28,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [61622719] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:28,771 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:28,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:28,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493910303] [2022-02-24 01:49:28,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:28,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:28,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:28,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:28,772 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:30,597 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-02-24 01:49:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:30,597 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:30,598 INFO L225 Difference]: With dead ends: 350 [2022-02-24 01:49:30,598 INFO L226 Difference]: Without dead ends: 344 [2022-02-24 01:49:30,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:30,598 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:30,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-24 01:49:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 251. [2022-02-24 01:49:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.4878048780487805) internal successors, (366), 246 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2022-02-24 01:49:31,210 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 76 [2022-02-24 01:49:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:31,210 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2022-02-24 01:49:31,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2022-02-24 01:49:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:31,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:31,210 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:31,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable521 [2022-02-24 01:49:31,210 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash 317776219, now seen corresponding path program 520 times [2022-02-24 01:49:31,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:31,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327472289] [2022-02-24 01:49:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:31,212 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:31,212 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:31,212 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:31,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:31,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327472289] [2022-02-24 01:49:31,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [327472289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:31,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:31,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:31,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500758141] [2022-02-24 01:49:31,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:31,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:31,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:31,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:31,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:31,665 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:33,491 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-02-24 01:49:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:33,491 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:33,492 INFO L225 Difference]: With dead ends: 356 [2022-02-24 01:49:33,492 INFO L226 Difference]: Without dead ends: 350 [2022-02-24 01:49:33,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:33,492 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:33,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:33,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-24 01:49:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 253. [2022-02-24 01:49:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.4879032258064515) internal successors, (369), 248 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 373 transitions. [2022-02-24 01:49:34,118 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 373 transitions. Word has length 76 [2022-02-24 01:49:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:34,118 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 373 transitions. [2022-02-24 01:49:34,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 373 transitions. [2022-02-24 01:49:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:34,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:34,119 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:34,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522 [2022-02-24 01:49:34,119 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:34,119 INFO L85 PathProgramCache]: Analyzing trace with hash 191908059, now seen corresponding path program 521 times [2022-02-24 01:49:34,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:34,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44811280] [2022-02-24 01:49:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:34,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:34,120 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:34,120 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:34,120 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:34,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:34,593 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:34,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44811280] [2022-02-24 01:49:34,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [44811280] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:34,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:34,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:34,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216552786] [2022-02-24 01:49:34,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:34,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:34,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:34,594 INFO L87 Difference]: Start difference. First operand 253 states and 373 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:36,434 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-02-24 01:49:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:36,434 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:36,434 INFO L225 Difference]: With dead ends: 362 [2022-02-24 01:49:36,435 INFO L226 Difference]: Without dead ends: 356 [2022-02-24 01:49:36,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:36,435 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:36,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-24 01:49:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 255. [2022-02-24 01:49:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.488) internal successors, (372), 250 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 376 transitions. [2022-02-24 01:49:37,063 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 376 transitions. Word has length 76 [2022-02-24 01:49:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:37,063 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 376 transitions. [2022-02-24 01:49:37,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 376 transitions. [2022-02-24 01:49:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:37,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:37,064 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:37,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523 [2022-02-24 01:49:37,064 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash -508309413, now seen corresponding path program 522 times [2022-02-24 01:49:37,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:37,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187742045] [2022-02-24 01:49:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:37,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:37,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:37,066 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:37,066 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:37,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:37,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:37,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187742045] [2022-02-24 01:49:37,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [187742045] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:37,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:37,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:37,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129285300] [2022-02-24 01:49:37,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:37,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:37,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:37,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:37,517 INFO L87 Difference]: Start difference. First operand 255 states and 376 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:39,374 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-02-24 01:49:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:39,375 INFO L225 Difference]: With dead ends: 368 [2022-02-24 01:49:39,375 INFO L226 Difference]: Without dead ends: 362 [2022-02-24 01:49:39,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:39,375 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:39,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 17 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-24 01:49:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 257. [2022-02-24 01:49:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-02-24 01:49:40,013 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 76 [2022-02-24 01:49:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:40,013 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-02-24 01:49:40,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-02-24 01:49:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:40,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:40,014 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:40,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524 [2022-02-24 01:49:40,014 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:40,014 INFO L85 PathProgramCache]: Analyzing trace with hash 892565467, now seen corresponding path program 523 times [2022-02-24 01:49:40,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:40,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518421869] [2022-02-24 01:49:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:40,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:40,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:40,016 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:40,016 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:40,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:40,467 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:40,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518421869] [2022-02-24 01:49:40,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518421869] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:40,467 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:40,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:40,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436723204] [2022-02-24 01:49:40,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:40,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:40,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:40,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:40,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:40,468 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:42,326 INFO L93 Difference]: Finished difference Result 374 states and 551 transitions. [2022-02-24 01:49:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:42,327 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:42,327 INFO L225 Difference]: With dead ends: 374 [2022-02-24 01:49:42,327 INFO L226 Difference]: Without dead ends: 368 [2022-02-24 01:49:42,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:42,328 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:42,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 29 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-24 01:49:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 259. [2022-02-24 01:49:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.4881889763779528) internal successors, (378), 254 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 382 transitions. [2022-02-24 01:49:42,964 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 382 transitions. Word has length 76 [2022-02-24 01:49:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:42,965 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 382 transitions. [2022-02-24 01:49:42,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 382 transitions. [2022-02-24 01:49:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:42,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:42,965 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:42,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525 [2022-02-24 01:49:42,965 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:42,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1486405797, now seen corresponding path program 524 times [2022-02-24 01:49:42,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:42,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393027841] [2022-02-24 01:49:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:42,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:42,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:42,967 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:42,967 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:43,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:43,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393027841] [2022-02-24 01:49:43,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393027841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:43,422 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:43,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:43,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752761474] [2022-02-24 01:49:43,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:43,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:43,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:43,422 INFO L87 Difference]: Start difference. First operand 259 states and 382 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:45,283 INFO L93 Difference]: Finished difference Result 380 states and 560 transitions. [2022-02-24 01:49:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:45,284 INFO L225 Difference]: With dead ends: 380 [2022-02-24 01:49:45,284 INFO L226 Difference]: Without dead ends: 374 [2022-02-24 01:49:45,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:45,284 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:45,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-24 01:49:45,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 261. [2022-02-24 01:49:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.48828125) internal successors, (381), 256 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 385 transitions. [2022-02-24 01:49:45,923 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 385 transitions. Word has length 76 [2022-02-24 01:49:45,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:45,923 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 385 transitions. [2022-02-24 01:49:45,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 385 transitions. [2022-02-24 01:49:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:45,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:45,924 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:45,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2022-02-24 01:49:45,924 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1539778267, now seen corresponding path program 525 times [2022-02-24 01:49:45,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:45,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840612417] [2022-02-24 01:49:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:45,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:45,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:45,926 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:45,926 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:46,378 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:46,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840612417] [2022-02-24 01:49:46,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [840612417] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:46,378 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:46,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:46,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581857306] [2022-02-24 01:49:46,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:46,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:46,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:46,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:46,379 INFO L87 Difference]: Start difference. First operand 261 states and 385 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:48,253 INFO L93 Difference]: Finished difference Result 386 states and 569 transitions. [2022-02-24 01:49:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:48,253 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:48,254 INFO L225 Difference]: With dead ends: 386 [2022-02-24 01:49:48,254 INFO L226 Difference]: Without dead ends: 380 [2022-02-24 01:49:48,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:48,254 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:48,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-24 01:49:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 263. [2022-02-24 01:49:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 258 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 388 transitions. [2022-02-24 01:49:48,895 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 388 transitions. Word has length 76 [2022-02-24 01:49:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:48,895 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 388 transitions. [2022-02-24 01:49:48,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 388 transitions. [2022-02-24 01:49:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:48,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:48,895 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:48,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2022-02-24 01:49:48,896 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2009804379, now seen corresponding path program 526 times [2022-02-24 01:49:48,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:48,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306122447] [2022-02-24 01:49:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:48,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:48,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:48,897 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:48,897 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:49,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:49,346 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:49,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306122447] [2022-02-24 01:49:49,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306122447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:49,347 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:49,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:49,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658840829] [2022-02-24 01:49:49,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:49,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:49,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:49,347 INFO L87 Difference]: Start difference. First operand 263 states and 388 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:51,219 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-02-24 01:49:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:51,220 INFO L225 Difference]: With dead ends: 392 [2022-02-24 01:49:51,220 INFO L226 Difference]: Without dead ends: 386 [2022-02-24 01:49:51,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:51,221 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:51,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-24 01:49:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 265. [2022-02-24 01:49:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.4884615384615385) internal successors, (387), 260 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 391 transitions. [2022-02-24 01:49:51,874 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 391 transitions. Word has length 76 [2022-02-24 01:49:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:51,875 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 391 transitions. [2022-02-24 01:49:51,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 391 transitions. [2022-02-24 01:49:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:49:51,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:51,875 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:51,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528 [2022-02-24 01:49:51,875 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1561635365, now seen corresponding path program 527 times [2022-02-24 01:49:51,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:51,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725649166] [2022-02-24 01:49:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:51,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:51,877 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:51,877 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:52,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:52,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725649166] [2022-02-24 01:49:52,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725649166] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:52,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:52,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:49:52,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132650956] [2022-02-24 01:49:52,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:52,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:49:52,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:52,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:49:52,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:49:52,329 INFO L87 Difference]: Start difference. First operand 265 states and 391 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:54,016 INFO L93 Difference]: Finished difference Result 334 states and 491 transitions. [2022-02-24 01:49:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:49:54,016 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:49:54,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:54,017 INFO L225 Difference]: With dead ends: 334 [2022-02-24 01:49:54,017 INFO L226 Difference]: Without dead ends: 328 [2022-02-24 01:49:54,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:49:54,017 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:54,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-24 01:49:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 205. [2022-02-24 01:49:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-24 01:49:54,453 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 76 [2022-02-24 01:49:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:54,453 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-24 01:49:54,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-24 01:49:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:49:54,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:54,453 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:54,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529 [2022-02-24 01:49:54,453 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:54,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1598211070, now seen corresponding path program 528 times [2022-02-24 01:49:54,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:54,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514845604] [2022-02-24 01:49:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:54,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:54,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:54,455 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:54,455 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:54,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:54,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:54,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514845604] [2022-02-24 01:49:54,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [514845604] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:54,925 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:54,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:49:54,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343926263] [2022-02-24 01:49:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:54,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 01:49:54,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:54,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 01:49:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:49:54,926 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:56,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:56,269 INFO L93 Difference]: Finished difference Result 220 states and 321 transitions. [2022-02-24 01:49:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:49:56,270 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-24 01:49:56,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:56,270 INFO L225 Difference]: With dead ends: 220 [2022-02-24 01:49:56,270 INFO L226 Difference]: Without dead ends: 214 [2022-02-24 01:49:56,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:49:56,270 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:56,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 23 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:56,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-24 01:49:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2022-02-24 01:49:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-24 01:49:56,713 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 78 [2022-02-24 01:49:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:56,713 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-24 01:49:56,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-24 01:49:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:49:56,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:56,713 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:56,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530 [2022-02-24 01:49:56,713 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash 503262078, now seen corresponding path program 529 times [2022-02-24 01:49:56,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:56,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588220578] [2022-02-24 01:49:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:56,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:56,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:56,715 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:56,715 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:57,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:57,189 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:57,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588220578] [2022-02-24 01:49:57,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588220578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:57,189 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:57,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:49:57,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994510351] [2022-02-24 01:49:57,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:57,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 01:49:57,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 01:49:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:49:57,190 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:49:58,547 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-24 01:49:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:49:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-24 01:49:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:49:58,548 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:49:58,548 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:49:58,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:49:58,548 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:49:58,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:49:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:49:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2022-02-24 01:49:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-24 01:49:59,031 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 78 [2022-02-24 01:49:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:49:59,031 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-24 01:49:59,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:49:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-24 01:49:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:49:59,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:49:59,032 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:49:59,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable531 [2022-02-24 01:49:59,032 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:49:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:49:59,032 INFO L85 PathProgramCache]: Analyzing trace with hash 524268286, now seen corresponding path program 530 times [2022-02-24 01:49:59,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:49:59,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258580468] [2022-02-24 01:49:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:49:59,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:49:59,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:49:59,033 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:49:59,033 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:49:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:59,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:49:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:49:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:49:59,512 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:49:59,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258580468] [2022-02-24 01:49:59,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [258580468] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:49:59,512 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:49:59,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:49:59,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929772013] [2022-02-24 01:49:59,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:49:59,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 01:49:59,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:49:59,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 01:49:59,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:49:59,513 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:50:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:50:00,895 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-24 01:50:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:50:00,895 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-24 01:50:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:50:00,896 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:50:00,896 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:50:00,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:50:00,896 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:50:00,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:50:00,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:50:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 215. [2022-02-24 01:50:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:50:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-24 01:50:01,370 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 78 [2022-02-24 01:50:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:50:01,370 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-24 01:50:01,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:50:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-24 01:50:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:50:01,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:50:01,371 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:50:01,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable532 [2022-02-24 01:50:01,371 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:50:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:50:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash -763602306, now seen corresponding path program 531 times [2022-02-24 01:50:01,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:50:01,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998980018] [2022-02-24 01:50:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:50:01,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:50:01,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:50:01,372 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-24 01:50:01,373 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:50:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat